valves are supposed to rotate as they work. some engines even have rocker offsets to make the valve rotate as it is actuated. you cant stop it anyway, unless you had a square valve.
The down fall to a pushrod engine the springs have to be strong to shove the rocker arm up and push rod and the lifter then the springs are so stiff the valve has to be heavy and beats the crap out of the seats. Go dohc
@JasonMann8 normal speed with a strobe light cycling just slightly less or more than the rpm of the engine. eg: 8000 rpm engine with a 7999 or 8001 flash per minute strobe. Very cool effect
The valves, springs, and retainers are not suppose to rotate in an engine like this. When they do its a sign of valvetrain instability. High end race engines such as this (no this is not the engine from the civic) are rebuilt frequently, they never have a chance for carbon buildup and such. Some production vehicle engines use rotator type retainers that do rotate the valve,but not the spring, in operation to aviod hot spots, carbon buildup, ect.
@mopar340360 lifters rotate, pushrods rotate, valves are round so they can rotate, hence the procedure of lapping them in, the only force able to rotate the valve is of course the spring, so it must rotate or lose contact with the valve at some point, it they were meant to not rotate they could easily be designed in a fixed position, and they are not for that reason, the wobble and the bounce are the problems in this video, correct me if im wrong plz!!!!
@curtknows101 watch the video again start to finish , note what the text is saying in relation to what is being shown in the video (severe rotation ,ect.) these are all examples of valvetrain control problems. I know this because I work for a high end engine builder, and see this kind of thing every week. They mention valve rotation as a bad thing, because its never suppose to occur in this type of engine. The wobble and flex you're seeing are symtoms exacerbated by valve float.
@mopar340360 Thankyou, i watched it several times and yea that cant be good, i can almost imagine the wear on the spring seats, hey while i got your attention, i notice your sign inas mopar 340360, check out my channel and you will see why that caught my attention, for a street 318 , 340 cam 444. max rpm 5500, your recommendation for a valve spring would be???? 1977, stock heads, 600 cfm, 74 Dart, 3.55 on 25 inch tires, dont know the weight of the car, 3000 lbs app. Thankyou, curtknows101
The spring spins because the diameter changes; it gets larger when you compress a spring. Go grab a spring, compressor, and calipers and test it yourself. So changing the spring's diameter 4,000 times per minute will definitely cause a spring to rotate; creating the need for hardened seats and avoiding titanium retainers for high endurance.
The Valve itself should spin. As FLSHBK1 stated it prevents carbon buildup on the valve and the valve seat. That prevents hotspots. hotspots cause ping.
What they are showing in the video is valve float. If you watch closely you will see the valve spring itself bounce, and spin. The Spring should not spin, or bounce. When the spring bounces, the valve itself bounces in the combustion chamber. This will cause that valve to fail, not to mention hurt the engines performance.
That's crazy, because I thought engines were good at 6000 but the assembly was spinning around at those revs. That's really strange to me, is that terrible for the engine or normal for it to spin like that?
@D13fledermause well get this ... on a VW flat-4 air cooled type I motor , the rocker arms are purposely off set when pushing them , to make the valves spin for even wear ... seriously ! . so I'm like you I dont see whats wrong with a valve rotating on its axes as long as its open ? ? ? but hey I dont know anything about V-8 valve trains ... anybody ? ? tell us please .
Your retarded....it looks like the valve is floating because the frames of the video equipment are catching up with the strobe light and valve movement when filming...take a timing light and point it at your fan...get the rpm's of your engine just right and it looks like the fan is not moving...ya go ahead and stick your fckn finger it.....post that video for me...
I am a valvetrain engineer and I see no evidence of float. Poor dynamic for sure. The spring bouncing and wobbling like that is surge and is common to all springs at high speed. The valve bounce on the other hand is very bad - not only for making power but for durability of the valve seat - it means the valve is seating at far too high a speed and/or in an uncontrolled manner. Much of that has to do with the cam design as it does with the spring load. Also the valve is supposed to rotate
@gravey07 The top rated comment by FLSHBK1 answers your questions. The valve bounce/float is caused by springs that aren't up to the task so they wobble and allow the valve to unseat. This was a much bigger problem in the past than it is now that we have a better understanding of valve profiles(computers) as well as better metallurgy. Though there's always a trade off. The stronger springs to reduce bounce also cause greater valvetrain stress and power loss. Desmo valves are another alternative.
valve rotation is a good efect and some diesel companies put ball bearings under the spring in order to do just that!they usually do that on exhaust valves!
It's interesting how some folks love American muscle cars but when you watch Top Gear, the hosts and their fans do nothing but rip on those cars. For me, it's all interesting and it's all good for selective purposes. For cruising on a Saturday night, I'd prefer a Lambo or Zonda, but that's just me.
You just can't beat American muscle, i live in the uk where we have crappy little cars with underpowered engines, i would just love a 60's/70's muscle car with a blown big block v8, you just cant beat them.
Is this video being played in slow motion and then real-time towards the end, or is it real-time all the way through? I just found a bent pushrod in my motor, so I'm just trying to get some perspective on how this all works.
@novaracer1963 at the end the valve seems to go faster but in fact it goes almost the same speed. It's just because the strobe-light is not timed perfectly with the rpm... you can see the same thing with a timing light and a fan.
@novaracer1963 If no one has answered you yet what you're seeing is an optical illusion similar to the rotation of a hellicopter blade at speed or the spokes of a wheel at speed. Because your brain can only process a certain amout of data from your eyes, you actually see glimpses of the object as it rotates. Watch some spoked wheels on the road. At certain speeds they can appear to be still or travel backwards. See at 1:20 when the engine slows the perspective changes. Hope this helps
When we studied AutoMech in the 1960s, we were taught that the valves were EXPECTED to rotate during their operation, and their followers were designed to create this desired feature. Rotating prevented hotspots or build-up of foreign objects on the valve seats. I still don't see rotation as a 'bad' thing. The valve stem wobble, however, is not something I would want, since it would cause the valve to leak around the seat.
@FLSHBK1 The valves are supposed to rotate ok, one of the spring holders contain a "roto-cap" and causes the valve to rotate slightly each time it is pushed. A friend of mine once had a Ford V6 that sounded like it had a bad valve lash on one valve. Removed the valve covers and found that one of the valves didnt rotate. Gave it a squirt of 5-56 and knocked it with a hammer(yes it was running), and the sound disappeared.
@FLSHBK1 youre correct on the rotating. stem wobble is almost unavoidable though, due to the geometry of the valve train. the rockers technically move in an arc, which is where guide wear comes from
@circlethewagons1 Absolutely correct! The arc isn't much, but it serves to wear the guides over time. I would love to find a hi-spd-slo-mo video of a desmodromic valve system running this high (8200 rpm) for comparison. For some reason, I didn't get the audio with this video the other times I viewed it. The narration adds a lot to undrstndng what we're seeing. I've always attributed engine "flat spots" to carb or ignition issues, but they can be caused by valve bounce or float @ intermediate RPM
@FLSHBK1 I think the problem with valve float is that the valve doesn't make good contact with the valve seat and so not only causes a loss in engine power but the valve does not cool properly and the valve "burns" causing permanent power loss and valve cooling problems.
@1971SuperLead Oh, I absolutely agree. Further, in some hi-compression engines, if the valve doesn't close fully or quickly enough, there's a real danger of it 'kissing' the piston. I've also had two engines which flashed-back thru the carb at high rpm, caused by weak intake springs ~ ignition occurred while the intake valve was not fully closed.
I would enjoy watching a comparison of this engine with a desmodromic valve train, such as they had on the old Mercedes Benz 300 SLs and Ducati bikes.
so correct me if im wrong cause i no nothing about how your able to watch the valve. but from what it looks like, your using some sort of strob in timing with the valve so you can take almost still shots of it to see the placment and unwanted rotation of the valve spring. its really amazing that the quick flashes trick your mind into seeing it almost still when really its moving 7000 times a min.
High 8000RPM or even 9000RPM for this valve spring can creat sagging and valves guide start to wear also,lots of valves manufacture should sell staineless steel valves guide for lesser wear,on any vehicles with high RMP...we already have stainless steel valves with black coating
Comp Cams is known for their dynamically unstable lobe profiles and the need for much higher valve spring pressures, especially when compared to the more dynamically stable grinds from Isky and UD. Not surprising to see Comp Cams show up in a valve float video....
Are these...Int/Exh valves hollowed within the stem core? Valve guides, are new right? The secret to having less of a rotation to the spring is easy. can anyone guess what that is? Hint; High heat, high rpm, spring...........?
false.. the valve is round, the seat is round, the valve guide is perfectly centered, when you lap the valve to the head, you basically, mate the surfaces. on a roller rocker engine you dont need valve rotation to maintain a valve seal. only full closure of the valves themselves. it is actually detrimental to guide wear, because it leeds to wobble as seen
I think I might want to consider upgrading my valve springs and cams after seeing this O.O I redline my Subaru pretty much every day I drive it, and I have no idea if the stock valve springs would like it...
The valves are sopose to rotate. We had to replace valve springs, valves and keepers on a chrysler recall because they failed to rotate and this caused carbon cake up on the valve bevels causing a rough idle and miss fire. so don't get why you showed that last part as if it were a problem.
@mushere2k9 the rotate to keep the carbon off. preventing burn valves. and in a high performance engine that is exactly what you want. any power house engine that doesn't do that will have valve trouble unless of course you run alcohol.
What did you do to correct the side to side valve movement, I know how important the spring pressure is but did you tighten up the stem clearance? Was this an actual running engine or electric motor driven?
OR you're a troll or you're a noob in engine's , anyway the valve moves so fast it can't be recorded by the camere , it what you see is like wen you're watching a tire of a car thats running fast , you see it run backwards/moving slowly , the sound you hear is the actual speed the valve is going up and down cheers
@combomaster99 ok, i get it, i didnt see any changes like how a wheel looks like its going backwards, the spring just compressed and decompressed at the same rate.
that is really interesting i didn't know it floated that much makes me want to replace the valve springs in my engine i know that is what is happing my engine looses power at about 4000 rpms but hay it got a lot of miles
Is this video taken with a strobe? Or a very fast fps vid camera, or both?
The comment that said it would be difficult to set up a strobe for this isn't true. The strobes that I have used for this kind of stuff are really pretty simple. They have a dial and a digital readout on them. So you just have to jack around with the dial to get it "on".
@mikem75 How do you think they adjust timing belts? A computer is used with a strobe light hooked to it and the computer is hooked up to the engine to calculate the engine's RPM. Then uses this RPM and tells the strobe light what frequency to flash with.
Markus Bott was murdered in 2009 by the BND which is the renamed GESTAPO because of our homepage linked on my channel. He had been tortured since 2004 to stop his human rights activities. Our homepage is linked on my channel.
@craigg1981 thats the most retarded thing ive ever heard....since you obviously know nothing about engines, what happens if the coil binds before the cam gets to max lift??? i'll leave you to think about that for a while and give you the opportunity to correct your statement.
Excellent video guys. Just a quick question.... was the head/valvetrain designed to spin the valve between stokes? Or is it just a by-product of high RPM/weak springs?
valves are supposed to rotate as they work. some engines even have rocker offsets to make the valve rotate as it is actuated. you cant stop it anyway, unless you had a square valve.
apexironworks 2 months ago
1:31 "It's Alive, ALIIIIIIIIIVE!"
GerbilEssences 2 months ago 3
for all trouble : new4stroke
feliksandrew 2 months ago
Just imaging all that wear on every revolution mile after mile, its amazing the valves and all even last 10,000 miles on an engine.
doggiejigs 3 months ago
Its like porn.
killersushi99 3 months ago 2
The down fall to a pushrod engine the springs have to be strong to shove the rocker arm up and push rod and the lifter then the springs are so stiff the valve has to be heavy and beats the crap out of the seats. Go dohc
sammonsrandall 4 months ago 4
Why not use shorter valve stems and dual springs?
stopglobalswarming 5 months ago
this is normal speed, the frame rate of the camera is too slow to show the valves actual movement.
JasonMann8 5 months ago
@JasonMann8 normal speed with a strobe light cycling just slightly less or more than the rpm of the engine. eg: 8000 rpm engine with a 7999 or 8001 flash per minute strobe. Very cool effect
MrBoolyman 2 months ago
Is this video realtime with the audio laid over it? is the frame rate matching the rate of the valve? or is this 10k+ FPS?
dakdewolf 5 months ago
valve floating is that left right movement of the valve?
180TheDragon 5 months ago
The valves, springs, and retainers are not suppose to rotate in an engine like this. When they do its a sign of valvetrain instability. High end race engines such as this (no this is not the engine from the civic) are rebuilt frequently, they never have a chance for carbon buildup and such. Some production vehicle engines use rotator type retainers that do rotate the valve,but not the spring, in operation to aviod hot spots, carbon buildup, ect.
mopar340360 5 months ago
@mopar340360 lifters rotate, pushrods rotate, valves are round so they can rotate, hence the procedure of lapping them in, the only force able to rotate the valve is of course the spring, so it must rotate or lose contact with the valve at some point, it they were meant to not rotate they could easily be designed in a fixed position, and they are not for that reason, the wobble and the bounce are the problems in this video, correct me if im wrong plz!!!!
curtknows101 5 months ago
@curtknows101 watch the video again start to finish , note what the text is saying in relation to what is being shown in the video (severe rotation ,ect.) these are all examples of valvetrain control problems. I know this because I work for a high end engine builder, and see this kind of thing every week. They mention valve rotation as a bad thing, because its never suppose to occur in this type of engine. The wobble and flex you're seeing are symtoms exacerbated by valve float.
mopar340360 5 months ago
@mopar340360 Thankyou, i watched it several times and yea that cant be good, i can almost imagine the wear on the spring seats, hey while i got your attention, i notice your sign inas mopar 340360, check out my channel and you will see why that caught my attention, for a street 318 , 340 cam 444. max rpm 5500, your recommendation for a valve spring would be???? 1977, stock heads, 600 cfm, 74 Dart, 3.55 on 25 inch tires, dont know the weight of the car, 3000 lbs app. Thankyou, curtknows101
curtknows101 5 months ago
so it's actually moving very fast?
Bakeneko64 5 months ago
@Bakeneko64 Yes.
dc12volthippy 5 months ago
omg im watching one scary ass amature horror film
lolfake111 5 months ago
The spring spins because the diameter changes; it gets larger when you compress a spring. Go grab a spring, compressor, and calipers and test it yourself. So changing the spring's diameter 4,000 times per minute will definitely cause a spring to rotate; creating the need for hardened seats and avoiding titanium retainers for high endurance.
steelmesh 6 months ago
the spring is good. nothing is wrong. you are trying to steal my money. >:(
LOL,
just kidding.
rscunha13 6 months ago
The Valve itself should spin. As FLSHBK1 stated it prevents carbon buildup on the valve and the valve seat. That prevents hotspots. hotspots cause ping.
What they are showing in the video is valve float. If you watch closely you will see the valve spring itself bounce, and spin. The Spring should not spin, or bounce. When the spring bounces, the valve itself bounces in the combustion chamber. This will cause that valve to fail, not to mention hurt the engines performance.
bluntdude420 6 months ago
I couldn't really see any valve float, the spring always looked connected to the rocker to me?
roflex2 6 months ago
@roflex2 you obviously didnt watch it past 3 minutes 17 seconds if you couldnt see it before then
rxrosco 6 months ago
That's crazy, because I thought engines were good at 6000 but the assembly was spinning around at those revs. That's really strange to me, is that terrible for the engine or normal for it to spin like that?
D13fledermause 6 months ago
@D13fledermause well get this ... on a VW flat-4 air cooled type I motor , the rocker arms are purposely off set when pushing them , to make the valves spin for even wear ... seriously ! . so I'm like you I dont see whats wrong with a valve rotating on its axes as long as its open ? ? ? but hey I dont know anything about V-8 valve trains ... anybody ? ? tell us please .
Cheer's from Arizona , usa .
lolahavasuaz 6 months ago
thats how fast i hump
dickcheese663 7 months ago
@dickcheese663 i feel bad for your girl lol jk
daltondevore 6 months ago
@dickcheese663 Your pillow!!!!!
curtknows101 5 months ago
Your retarded....it looks like the valve is floating because the frames of the video equipment are catching up with the strobe light and valve movement when filming...take a timing light and point it at your fan...get the rpm's of your engine just right and it looks like the fan is not moving...ya go ahead and stick your fckn finger it.....post that video for me...
SoundFactors 7 months ago
@SoundFactors Dude your an idiot, that sob is still spinning and i got thirteen stitches now to prove it!!!!! thanks a whole bunch you moron:-D
curtknows101 4 months ago
I am a valvetrain engineer and I see no evidence of float. Poor dynamic for sure. The spring bouncing and wobbling like that is surge and is common to all springs at high speed. The valve bounce on the other hand is very bad - not only for making power but for durability of the valve seat - it means the valve is seating at far too high a speed and/or in an uncontrolled manner. Much of that has to do with the cam design as it does with the spring load. Also the valve is supposed to rotate
mikeknauf 7 months ago
@mikeknauf Yes you are correct, they are supposed to rotate, thankyou, otherwise it would be designed square lol
curtknows101 5 months ago
Boing boing boing boing lol
avalanch08 7 months ago
have you tried tubular valve stems? 1.2 mm in diameter holes?
authmaax 8 months ago
Im not arguing it. But wanted to know how valve spring rotation can be a good thing?
And what is valve bounce exactly? Whwn the valve isnt quick enough to return to its position or whwn it wobbles? Or...?
Thanks.
gravey07 8 months ago
@gravey07 The top rated comment by FLSHBK1 answers your questions. The valve bounce/float is caused by springs that aren't up to the task so they wobble and allow the valve to unseat. This was a much bigger problem in the past than it is now that we have a better understanding of valve profiles(computers) as well as better metallurgy. Though there's always a trade off. The stronger springs to reduce bounce also cause greater valvetrain stress and power loss. Desmo valves are another alternative.
UCMolosser 8 months ago
valve rotation is a good efect and some diesel companies put ball bearings under the spring in order to do just that!they usually do that on exhaust valves!
petros172 9 months ago
How did I get here from a Portal 2 video...?
Oh, wait...
FranxNeto 9 months ago 2
@FranxNeto Ahahaha valve. I went from some tf2 video to something about breast implants, lol
Isjix 8 months ago
It's interesting how some folks love American muscle cars but when you watch Top Gear, the hosts and their fans do nothing but rip on those cars. For me, it's all interesting and it's all good for selective purposes. For cruising on a Saturday night, I'd prefer a Lambo or Zonda, but that's just me.
terrabus1 9 months ago
don't watch this video if you have epilepsy... lol.
battlefield2maniac 9 months ago 80
@battlefield2maniac Now you fkn tell me ...
LRGHMN 7 months ago
@battlefield2maniac kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
jnsbp83 4 months ago
You just can't beat American muscle, i live in the uk where we have crappy little cars with underpowered engines, i would just love a 60's/70's muscle car with a blown big block v8, you just cant beat them.
V8 all the way !!!
02uawitt 9 months ago
@02uawitt DERP!
karsown 9 months ago
@02uawitt thats whats up man, i gotta hand it to european cars tho man, they have style....and plenty of power as well
ITRIEDEL 8 months ago
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wd4000000 9 months ago
Comment removed
wd4000000 9 months ago
Is this video being played in slow motion and then real-time towards the end, or is it real-time all the way through? I just found a bent pushrod in my motor, so I'm just trying to get some perspective on how this all works.
novaracer1963 9 months ago
@novaracer1963 at the end the valve seems to go faster but in fact it goes almost the same speed. It's just because the strobe-light is not timed perfectly with the rpm... you can see the same thing with a timing light and a fan.
olivier01234 9 months ago
@novaracer1963 If no one has answered you yet what you're seeing is an optical illusion similar to the rotation of a hellicopter blade at speed or the spokes of a wheel at speed. Because your brain can only process a certain amout of data from your eyes, you actually see glimpses of the object as it rotates. Watch some spoked wheels on the road. At certain speeds they can appear to be still or travel backwards. See at 1:20 when the engine slows the perspective changes. Hope this helps
speed55racer 9 months ago
and valve springs bounce. that doesn't mean they're floating.
circlethewagons1 10 months ago
valves are supposed to rotate to distribute heat.
circlethewagons1 10 months ago
holy fuck, gabe newell must watch this.
iiGerardoii 10 months ago
COOL!
lastofgenxxx 11 months ago
Congratulations on an excellent video.
palapescada 11 months ago
was there coil bind in that? doint know just wondering.
ranger3931 1 year ago
i got here bcaus i type valve the game company valve that makes l4d l4d2 and hlf2 tf2 then this happen.
gam3zrolf 1 year ago
@gam3zrolf same
DeathRow200 11 months ago
sweet vid
25rsboy 1 year ago
When we studied AutoMech in the 1960s, we were taught that the valves were EXPECTED to rotate during their operation, and their followers were designed to create this desired feature. Rotating prevented hotspots or build-up of foreign objects on the valve seats. I still don't see rotation as a 'bad' thing. The valve stem wobble, however, is not something I would want, since it would cause the valve to leak around the seat.
Thnx for posting this very interesting vid.
FLSHBK1 1 year ago 44
@FLSHBK1 The valves are supposed to rotate ok, one of the spring holders contain a "roto-cap" and causes the valve to rotate slightly each time it is pushed. A friend of mine once had a Ford V6 that sounded like it had a bad valve lash on one valve. Removed the valve covers and found that one of the valves didnt rotate. Gave it a squirt of 5-56 and knocked it with a hammer(yes it was running), and the sound disappeared.
KapteinOpel 11 months ago
@FLSHBK1 youre correct on the rotating. stem wobble is almost unavoidable though, due to the geometry of the valve train. the rockers technically move in an arc, which is where guide wear comes from
circlethewagons1 10 months ago
@circlethewagons1 Absolutely correct! The arc isn't much, but it serves to wear the guides over time. I would love to find a hi-spd-slo-mo video of a desmodromic valve system running this high (8200 rpm) for comparison. For some reason, I didn't get the audio with this video the other times I viewed it. The narration adds a lot to undrstndng what we're seeing. I've always attributed engine "flat spots" to carb or ignition issues, but they can be caused by valve bounce or float @ intermediate RPM
FLSHBK1 10 months ago
Comment removed
wd4000000 9 months ago
Comment removed
wd4000000 9 months ago
@FLSHBK1 I think the problem with valve float is that the valve doesn't make good contact with the valve seat and so not only causes a loss in engine power but the valve does not cool properly and the valve "burns" causing permanent power loss and valve cooling problems.
1971SuperLead 9 months ago
@1971SuperLead Oh, I absolutely agree. Further, in some hi-compression engines, if the valve doesn't close fully or quickly enough, there's a real danger of it 'kissing' the piston. I've also had two engines which flashed-back thru the carb at high rpm, caused by weak intake springs ~ ignition occurred while the intake valve was not fully closed.
I would enjoy watching a comparison of this engine with a desmodromic valve train, such as they had on the old Mercedes Benz 300 SLs and Ducati bikes.
FLSHBK1 9 months ago
@FLSHBK1 The rotation isn't bad, the jackhammer effect is... It's basically pounding on the valve seat.
Excellent video!
SarraPiyopiyo 6 months ago
@FLSHBK1 Yeah the valves ARE supposed to rotate, but not the springs also.
yobarry 4 months ago
talk about a painful sound : (
2tallbrandon 1 year ago
so correct me if im wrong cause i no nothing about how your able to watch the valve. but from what it looks like, your using some sort of strob in timing with the valve so you can take almost still shots of it to see the placment and unwanted rotation of the valve spring. its really amazing that the quick flashes trick your mind into seeing it almost still when really its moving 7000 times a min.
299special 1 year ago
@299special You just described a video camera. lol
TacoChino 1 year ago
@TacoChino haha did i really? i didnt know how video cameras worked
299special 1 year ago
@299special lol! Yah! :P How DO you get one in such a small space, though?
TacoChino 1 year ago
@299special yeah it is correct,strobe lights was used for super slow motion before the invention of high fps cameras
bisnonnocanapa 1 year ago
bitchin shit dude, great video
cfb36 1 year ago
Great video, love the shot of the valve! In addition to spring pressure, cam profile plays a large part to minimize valve bounce too. Nice job!
Ottodyn 1 year ago
Is it going so fast that I cant see it? I dont understand..
Kirbynessness 1 year ago
@Kirbynessness stroboscope...
AKAtheA 1 year ago
You want good stuff by isky period never had a problem.
HunterCO1 1 year ago
High 8000RPM or even 9000RPM for this valve spring can creat sagging and valves guide start to wear also,lots of valves manufacture should sell staineless steel valves guide for lesser wear,on any vehicles with high RMP...we already have stainless steel valves with black coating
ltp9735 1 year ago
Comp Cams is known for their dynamically unstable lobe profiles and the need for much higher valve spring pressures, especially when compared to the more dynamically stable grinds from Isky and UD. Not surprising to see Comp Cams show up in a valve float video....
The10851Man 1 year ago
dude !!! this is totally awesome video very nice!!!
beluga420 1 year ago
very cool video of the valvetrain at high rpms
BlkFlagMotorsports 1 year ago
so do you want valve rotation or no?
TheTalonTsi 1 year ago
Comment removed
TheTalonTsi 1 year ago
what kind of rocker are that for civic i never seen that before?
tub88vang 1 year ago
Are these...Int/Exh valves hollowed within the stem core? Valve guides, are new right? The secret to having less of a rotation to the spring is easy. can anyone guess what that is? Hint; High heat, high rpm, spring...........?
sprydo7 1 year ago
@sprydo7 spring retainer??
beluga420 1 year ago
@beluga420
sprydo7 1 year ago
@sprydo7 huhh?
beluga420 1 year ago
This has been flagged as spam show
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puppypuppy14 1 year ago
why is the spring in rotation?
machusi1989 1 year ago
@machusi1989 because if it didnt rotate the valve would never seal
Feralspirit15 1 year ago
@Feralspirit15
false.. the valve is round, the seat is round, the valve guide is perfectly centered, when you lap the valve to the head, you basically, mate the surfaces. on a roller rocker engine you dont need valve rotation to maintain a valve seal. only full closure of the valves themselves. it is actually detrimental to guide wear, because it leeds to wobble as seen
xionmotorpeng 1 year ago
damn its like watching a horror movie
eghatchoutlawed 1 year ago
How is this filmed? Its awesome!
crisvsv 1 year ago
I think I might want to consider upgrading my valve springs and cams after seeing this O.O I redline my Subaru pretty much every day I drive it, and I have no idea if the stock valve springs would like it...
AWDfreak 1 year ago
Wow!!! I want to watch this video whilst on acid!!!!!!
MalliganTheUFO 1 year ago
@MalliganTheUFO haha whilst. Awesome word!
thooke222 1 year ago
@thooke222 lol, Im not going to argue with you there!!! But why do you figure its so awesome????
MalliganTheUFO 1 year ago
@MalliganTheUFO I guess I just don't hear it very often, and in the context of an acid trip it just struck me as funny
thooke222 1 year ago
@thooke222 I can see your point
MalliganTheUFO 1 year ago
whoever is working the gas pedal has a highly tuned right foot! :)
383mazda 1 year ago
The valves are sopose to rotate. We had to replace valve springs, valves and keepers on a chrysler recall because they failed to rotate and this caused carbon cake up on the valve bevels causing a rough idle and miss fire. so don't get why you showed that last part as if it were a problem.
MrGizmo757 1 year ago
@MrGizmo757 because some engines do have valves that are desinged to rotate, but most dont because of the desing of the valve seats
mushere2k9 1 year ago
@mushere2k9 the rotate to keep the carbon off. preventing burn valves. and in a high performance engine that is exactly what you want. any power house engine that doesn't do that will have valve trouble unless of course you run alcohol.
MrGizmo757 1 year ago
@MrGizmo757 yes thats what i mean, but i know for a fact the spring isnt supposed to spin.......that means the sping isnt keeping proper pressure
mushere2k9 1 year ago
Moving sooo fast that it looks like it is going slow....AMAZING...
scott93257 1 year ago
it's ok! just put some lapping compound in the fuel!!! lol
edcoondog 1 year ago
this isn't slowed down is it? I guess it's like you would the timing
Wambonater 1 year ago
What did you do to correct the side to side valve movement, I know how important the spring pressure is but did you tighten up the stem clearance? Was this an actual running engine or electric motor driven?
trumpnut 1 year ago
wtf? is the camera too slow for it or is the engine really running that slow? whats the buzzing sound?
chillincruisin 1 year ago
@chillincruisin
herpa derp
combomaster99 1 year ago
@combomaster99 :(
chillincruisin 1 year ago
@chillincruisin
OR you're a troll or you're a noob in engine's , anyway the valve moves so fast it can't be recorded by the camere , it what you see is like wen you're watching a tire of a car thats running fast , you see it run backwards/moving slowly , the sound you hear is the actual speed the valve is going up and down cheers
combomaster99 1 year ago
@combomaster99 ok, i get it, i didnt see any changes like how a wheel looks like its going backwards, the spring just compressed and decompressed at the same rate.
chillincruisin 1 year ago
@chillincruisin
don't worry dude , beeing alittle behind in physics is not so bad, you will have you're own things that you're good at:)
combomaster99 1 year ago
No Boom?! @1:20 to 1, is it 8200 or 3200?
AdMiRaLeDpIeTt 1 year ago
@AdMiRaLeDpIeTt 8200^^
BruceCarbon 1 year ago
@BruceCarbon oh man that's a heart attacking, cardiac arresting and ROFL RPM! That resulted to a Coronary Artery Disease!
AdMiRaLeDpIeTt 1 year ago
@AdMiRaLeDpIeTt some engines are reving higher than 8000 rpm like Honda S2000 with it's vtec ;-)
BruceCarbon 1 year ago
i think i just vomited colors
bobcow384 1 year ago
Fun with strobe lights ! :)
yak55x 1 year ago
It looks like one of those avant garde experimental movies :P
ashacrasha 1 year ago
que mierda de video
sam62361 1 year ago
i dont understand how they got that second shot, and was it the intake, or the exaugst valve on the second pard?
chargerfish1 1 year ago
@chargerfish1 id say it wouldnt be on a complete engine, dont see any detonation happening. very intersting to see the valve rotating though.
Sum0nelse 1 year ago
@nipaaa hahahahaahahaha..... man!!! you made me laugh out loud....
pirervoi 1 year ago
that is really interesting i didn't know it floated that much makes me want to replace the valve springs in my engine i know that is what is happing my engine looses power at about 4000 rpms but hay it got a lot of miles
MrUnderpaid 1 year ago
honeycomb springs would help
xxxxdarksidexxxx 1 year ago
bestale quanto sballotta la molla :S
soapman7x7 1 year ago
the speed at the cam is the half of the crank
and when the intake valve works the exhaust doesn't
so it's not so high rpm that 8000 for the valves
michaelovitch 1 year ago
uhhh.. wow, gonna go buy valve springs now and do some head work.
snaremj 1 year ago
sounds like skunk2 at the ending part because there so advance with their head works
TaLoCc 1 year ago
Extremly good Video!!! I've never seen suh a dynamic process before and it helps me to understand what happens in the motor.
lupuszzz 1 year ago
OMG, my eyes were going funny. this vid needs an seizure warning, cool though
imautuber444 1 year ago
Thats it..........the scariest thing ive ever seen
acmwm 1 year ago
cant imagine that this spring does it 160 times a second
DizzlerDazzler 1 year ago
wow this is psychedelic dude! lol
Michaeljsnow 1 year ago 11
@Michaeljsnow yea that is trippy
tevinm14 11 months ago
ROFL. it's like the ring.
snowman4839 1 year ago
@snowman4839 i was thinking the samething
germancatala 1 year ago
If there is anyone around the Tampa Florida area that would like to "play" with one, gimme a shout.
I am about 90 miles north of Tampa and use these strobes on my racecars and whatnot lol....
ACEMAN34448 1 year ago
Is this video taken with a strobe? Or a very fast fps vid camera, or both?
The comment that said it would be difficult to set up a strobe for this isn't true. The strobes that I have used for this kind of stuff are really pretty simple. They have a dial and a digital readout on them. So you just have to jack around with the dial to get it "on".
We use them all the time at my job.
Thanks for sharing!!
ACEMAN34448 1 year ago
timing the strobe light meter to the rpm had to be difficult.
mikem75 1 year ago
@mikem75 How do you think they adjust timing belts? A computer is used with a strobe light hooked to it and the computer is hooked up to the engine to calculate the engine's RPM. Then uses this RPM and tells the strobe light what frequency to flash with.
KirkTheGod 1 year ago
that is some high tech testing, i wish i had this technology in my garage
ed563 1 year ago
EPILEPTICS BEWARE!!!
art1618 1 year ago
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Markus Bott was murdered in 2009 by the BND which is the renamed GESTAPO because of our homepage linked on my channel. He had been tortured since 2004 to stop his human rights activities. Our homepage is linked on my channel.
wwwtotalitaerde 1 year ago
That was kind of trippy.
mgospeed31 1 year ago 3
geez, are you trying to give me a seizure?
dcdearth 1 year ago
Craig 1981 you are a retard who knows nothing about engines. Coil bind damages valve springs and you should NEVER have it. Moron.
LoudMouthTim 1 year ago
Damn. Awesome video. With all that flexing, i was kinda hoping for the valve to fatigue and drop into the cylinder.
ihazpowrz 1 year ago
looks like you have some spring bind going on too.
565Customz 1 year ago
@565Customz Your supposed to have coil bind, thats what stops the valve from going too far into the cylinder and kissing the piston.
craigg1981 1 year ago
@craigg1981 thats the most retarded thing ive ever heard....since you obviously know nothing about engines, what happens if the coil binds before the cam gets to max lift??? i'll leave you to think about that for a while and give you the opportunity to correct your statement.
565Customz 1 year ago
1:35 gave me a seizure. 1:40 made it worse.
RomeoReject23 1 year ago
wtf is happening this video is horrible
klx134sm 1 year ago
@klx134sm this video is horrible?, lets see u make a better one
rubberbandman03 1 year ago
@rubberbandman03 maybe I will asshole
klx134sm 1 year ago
this causes way to much oil consumption and really not necessary.
loveudestany 1 year ago
Who filed this ??
Ingsok 1 year ago
Not true. Check out Coates engines.
turboslag 1 year ago
Roll on pnuematic or solenoid actuated valves !! Or , better still , rotary valves !!
turboslag 1 year ago
rotary valves sucks.
there is not tight seal as on a regular valve.
solenoid actuated is not done yet.
naturalyshocked 1 year ago
the idea of rotary valves is a great one! while the seal does suck, it can be made to work, and the RPMs would be amazing, as are desmodesic valves
petthekittyz 1 year ago
Excellent video guys. Just a quick question.... was the head/valvetrain designed to spin the valve between stokes? Or is it just a by-product of high RPM/weak springs?
Just curious.
putneyscustommachine 1 year ago
good call, it's a design feature in some engines
OverlyExcitedNewJack 1 year ago
just the capability to make a video like this says alot. very informative! maybe i will have you guys build my engine while in iraq..=)
TheRowdyJ 2 years ago 12
get a rotary engine, less worries
kriegdouch 2 years ago 2
no torque...........granted you can run them high and not worry... then again with any amount of money you can make a big block rev at 9,000
MidnightSpeedNSound 1 year ago
Not really. You're trading valve springs for apex seals.
Personally, I'd rather have the springs. Easier to replace than apex seals.
TestECull 1 year ago
@kriegdouch your a fool. rotaries have a lot more that can go wrong. its just easier to fix them if you know how to fix rotaries.
tennerman 1 year ago
yet less moving parts
kriegdouch 1 year ago
i second that! lol. "oil premix + worrying about apex seals"
Slidingmy240sx 1 year ago
This has been flagged as spam show
all spics must die
600YamahaJunkie 2 years ago
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WTF looks like a bad horror movie or a bad club strobe ,,the lights ruined it !!!
Even though i got the idea good demo
ABLACKX 2 years ago