Yes, we did drill the jets one time for a go kart engine. We went too large, and it ran poorly! Even with a set of # drill bits etc., a slight increase can be too much.
We like the old carbs with the needle valve, gotta luv those golden oldies!!!! :)
@ChargerMiles007 Cool... i just drilled one for a quad racer i'm working on i had two jets to work with one to big other to small... in my case I got lucky 1/16 was right in the middle. I'm only working with big bores... your video inspired me to look into other methods.
Yes, you could, but the average Turbo you can buy cheaply is way to large to spin up to a reasonable speed with such a small displacement engine. It will spin, but it sure won't make anything for boost.
They seem to be able to absorb some punishment, they rev them to 7000rpm in go-karts. We have yet to blow one up, but I know it is possible, since I have collected a few from the scrap yard with holes blown in the side :(
If the Briggs and scrap iron engine company would use a stronger metal in the bottom ends of thier engines (say like;bronze instead of the puny aluminum alloy) the HP gain would be obtainable.That is the weak link to the HP gain with these small engines.They really are not able to handle the extra hp that is wanted.When you push then for an extra 2hp they barf thier bottom ends very shortly.IF a person could even possible manage to weld some extra bracing down the sides of the rod them maybe???.
Howdy, sounds like you have had bad luck with conrods!
I would put in a racing 5 horse rod, and try it again, I have had good luck with these engines, but I make sure it has a tight rod first. I generally tear each engine right down to check the rod and crank. I have heard that the racing "5 horses" can put out at least 10 horse at about 7000 rpm, but they have modified cams, valve springs etc. to achieve that.
Right on 007.Ive toyed with small engines to gain HP and found that by just adapting a larger carb was a simple method of getting the gain.I simply put a 5hp.carb on a 31/2 engine and installed it on a riding mower.Im sure that the 31/2 engine put out a 5 to 6hp for the few moments it coud handle the overkill of gas.It ended up tossing a rod very shortly.I then installed an 8hp carb on an 5hp with the same results as before.I think it turned out 7hp for a few moments before throwing a rod also.
Hard to say, a friend did the machine work on the turbo.
Knowing my son, he probably had it done in a week or so, I know the inlet manifold posed some problems, the one for the other configuration was made of fiberglass.
I guess I was wrong about that, according to my son :(
This one uses a diaphragm fuel pump to pressurize the fuel bowl, since you have to overcome the boost pressure to allow fuel to go into the carb. The original way it was made (on the vid where it is running) used a suck thru carb. setup, so no fuel pump was required. Sorry for leading you astray there, I thought the tank was pressurized, and I think a person could make that work with a pressure regulator.
@Mrengineerwannabe1 I think he got it wrong about the fuel tank.but my nitro engines pressurise the tank from a pipe from the muffler to the tank. Its only a little pressure but I'm not sure if it would be safe to do this with petrol.
I will admit that I am not fully aware of how this set up works, as my son built it. I think the idea is that since the carb is now pressurised, the fuel needs to be also, but I think the tank isn't pressurized, only the fuel after the pump, like in a car. I goofed on the vid, it is all the high pressure I am under!!!!! :)
@ChargerMiles007 you said big turn at crankshaft and a little one at the supercharger but you have to say little trun on the crankshaft and a big one at the supercharger...
The supercharger needs to spin very fast to make any boost, so we put a large pulley on the crankshaft, and spin it at say 5000rpm. The we put a small pulley on the supercharger, 1/6th as large as the crankshaft pulley. Therefore the supercharger spins at 6 times the speed of the crankshaft, like 30,000 rpm.
Oh, sorry about that, if thats the way I said it in the vid!
With a centrifugal type supercharger, like this, it has to spin very fast to make any boost pressure, thats why you need it to spin much faster than the crankshaft. Turbochargers are the same way, some this size spin at least 100,000 rpm. We would have used an 8:1 or even 10:1 speed increase, but we could not find or fit in a pulley that large, plus a large pulley can fly apart if driven too fast!
How was the engine running with no sparkplug wire in the photo??? Btw the engine will run alot nicer if you were to attach the charger directly to the block, then have the carb on the intake of the turbo, more vacuum= better performance plus it doesn't run lean because the supercharger may try to push the fuel back into the fuel bowl. You did do a good job thoe :)
nice build. you will need gears to get the impeller to turn fast enough though. 6 to 1 is not enough without gears. if you look at centrifugal super charger made for a vehicle, you will notice they have gearing that further increases the ratio made by the pulleys. tell you son to becareful. I strapped one of these (5hp b&s) to a push scooter when i was 15 and the exposed gears ended up taking a bite size hunk of meat out of my thigh. the throttle had stuck and i was doin 30mph down a dead end st
It don't git much more awesome than that man... WOW!!! I'd love to see it working too.... Great usage of the belt. I saw another vid of a guy who used the exhaust from the engine but a car turbo. obviously not nearly enough flow to make good use of the turbo, but your idea is much better and more sound.... Great idea and workmanship!
I do have a vid of it running, but it uses a suck thru carb. on that vid, and it wasn't taken with a digital camera, so I would have to take a vid of my TV screen! But I guess I could do that, just to prove that it has indeed been run. I will see if I can locate the VHS tape of it :)
My son built this one, and we have yet to run it in this configuration.
@ChargerMiles007 if you can that would be great because im planning on doing it on a 8hp briggs with my turbo but convert it to belt since its the same size as this one
I will make a note to myself to check that out, since I have so much going on that I forget stuff! :( If you don't see a vid within a week, send me a message to wake me up! :)
DUDE!!! Your colling system is missing, YES it is cool up there,BUT!!!!!! The cylinder head is lacking a fly wheel cover and is in fact is the engine cooling system
I know it has been mild, but generally you have to play around with an engine a bit to get it tuned right, thats not nice to do at 20 some degrees F. , and thats on a warm day. It would probably be OK to fire it up at 50F., but that is going to be a ways off yet!
Oh, trust me it WILL work, if I have to use mechanical fuel injection (me spraying gas into the blower inlet with an oil can!!! :)) While wearing gloves and safety glasses!
yeah i hate winter id never be able to live in canada. i love the snow but i hate not being able to do anything.. and that gives me a idea...... spray a tiny bit of nos into the inlet ahaha
Will the wee fuel pump raise the fuel pressure above boost even with a pressurized tank? I think that could be an issue. It should work in downdraft mode. If you run it please put a pressure gage on the intake!!! ;) I hope it runs.
did you just drill the jets? dont think they sell larger jets for those motors?
domains38 2 weeks ago
@domains38
Yes, we did drill the jets one time for a go kart engine. We went too large, and it ran poorly! Even with a set of # drill bits etc., a slight increase can be too much.
We like the old carbs with the needle valve, gotta luv those golden oldies!!!! :)
ChargerMiles007 2 weeks ago
@ChargerMiles007 Cool... i just drilled one for a quad racer i'm working on i had two jets to work with one to big other to small... in my case I got lucky 1/16 was right in the middle. I'm only working with big bores... your video inspired me to look into other methods.
domains38 2 weeks ago
Comment removed
domains38 2 weeks ago
@ChargerMiles007 can you use those turbos on exhaust instead?
domains38 2 weeks ago
@domains38
Yes, you could, but the average Turbo you can buy cheaply is way to large to spin up to a reasonable speed with such a small displacement engine. It will spin, but it sure won't make anything for boost.
ChargerMiles007 2 weeks ago
This is actually a procharger style compressor. it is basically a turbo with a pully. cool idea
tylerspyler2 2 weeks ago
@tylerspyler2
Yes, I guess you are right, hadn't really thought of that, we just came up with the idea, and built it. :)
ChargerMiles007 2 weeks ago
I worked on those 5 Hp Briggs engines They are very frail in construction to be adding a supercharger
chuckbear1961 1 month ago
@chuckbear1961
They seem to be able to absorb some punishment, they rev them to 7000rpm in go-karts. We have yet to blow one up, but I know it is possible, since I have collected a few from the scrap yard with holes blown in the side :(
Nice old engine in your channel logo!
ChargerMiles007 1 month ago
If the Briggs and scrap iron engine company would use a stronger metal in the bottom ends of thier engines (say like;bronze instead of the puny aluminum alloy) the HP gain would be obtainable.That is the weak link to the HP gain with these small engines.They really are not able to handle the extra hp that is wanted.When you push then for an extra 2hp they barf thier bottom ends very shortly.IF a person could even possible manage to weld some extra bracing down the sides of the rod them maybe???.
mastersduhgree 1 month ago
@mastersduhgree
Howdy, sounds like you have had bad luck with conrods!
I would put in a racing 5 horse rod, and try it again, I have had good luck with these engines, but I make sure it has a tight rod first. I generally tear each engine right down to check the rod and crank. I have heard that the racing "5 horses" can put out at least 10 horse at about 7000 rpm, but they have modified cams, valve springs etc. to achieve that.
ChargerMiles007 1 month ago
Right on 007.Ive toyed with small engines to gain HP and found that by just adapting a larger carb was a simple method of getting the gain.I simply put a 5hp.carb on a 31/2 engine and installed it on a riding mower.Im sure that the 31/2 engine put out a 5 to 6hp for the few moments it coud handle the overkill of gas.It ended up tossing a rod very shortly.I then installed an 8hp carb on an 5hp with the same results as before.I think it turned out 7hp for a few moments before throwing a rod also.
mastersduhgree 1 month ago
How long did it take your son to build it?
Mrengineerwannabe1 1 month ago
@Mrengineerwannabe1
Hard to say, a friend did the machine work on the turbo.
Knowing my son, he probably had it done in a week or so, I know the inlet manifold posed some problems, the one for the other configuration was made of fiberglass.
ChargerMiles007 1 month ago
Can you walk me through the pressurized fuel tank part?
Mrengineerwannabe1 1 month ago
@Mrengineerwannabe1
I guess I was wrong about that, according to my son :(
This one uses a diaphragm fuel pump to pressurize the fuel bowl, since you have to overcome the boost pressure to allow fuel to go into the carb. The original way it was made (on the vid where it is running) used a suck thru carb. setup, so no fuel pump was required. Sorry for leading you astray there, I thought the tank was pressurized, and I think a person could make that work with a pressure regulator.
ChargerMiles007 1 month ago
@Mrengineerwannabe1 I think he got it wrong about the fuel tank.but my nitro engines pressurise the tank from a pipe from the muffler to the tank. Its only a little pressure but I'm not sure if it would be safe to do this with petrol.
thra5herxb12s 3 weeks ago
@thra5herxb12s
I will admit that I am not fully aware of how this set up works, as my son built it. I think the idea is that since the carb is now pressurised, the fuel needs to be also, but I think the tank isn't pressurized, only the fuel after the pump, like in a car. I goofed on the vid, it is all the high pressure I am under!!!!! :)
ChargerMiles007 3 weeks ago
lol i figure "hey is must be easy on a Briggs and stratton" then i click on the video and im all like
"what in the fuck am i looking at right now" XD
171apples171 1 month ago
you said a big turn at the crankshaft and a little ond at the supercharger... but it's the other way around...
Dirtpros 5 months ago
@Dirtpros
Not if you look at the pulley sizes on the back. The big one on the crankshaft turns the supercharger 6 times as fast.
ChargerMiles007 5 months ago
@ChargerMiles007 you said big turn at crankshaft and a little one at the supercharger but you have to say little trun on the crankshaft and a big one at the supercharger...
Dirtpros 5 months ago
@Dirtpros
Sorry, I don't follow you.
The supercharger needs to spin very fast to make any boost, so we put a large pulley on the crankshaft, and spin it at say 5000rpm. The we put a small pulley on the supercharger, 1/6th as large as the crankshaft pulley. Therefore the supercharger spins at 6 times the speed of the crankshaft, like 30,000 rpm.
ChargerMiles007 5 months ago
@ChargerMiles007 but in your video you didn't say it that way... in the video you said the right gear ratio but you explaned it wrong.
Dirtpros 5 months ago
@Dirtpros
Oh, sorry about that, if thats the way I said it in the vid!
With a centrifugal type supercharger, like this, it has to spin very fast to make any boost pressure, thats why you need it to spin much faster than the crankshaft. Turbochargers are the same way, some this size spin at least 100,000 rpm. We would have used an 8:1 or even 10:1 speed increase, but we could not find or fit in a pulley that large, plus a large pulley can fly apart if driven too fast!
ChargerMiles007 5 months ago
Thats just bad ass... plain and simple.
AnnexGroup 8 months ago
@AnnexGroup
Thanks :)
My son wants to fire his Beast up soon, but I am currently using the base for my poppet valve 2 stroke.
ChargerMiles007 8 months ago
Was this done just to see if it will work or are you trying to get some kind of advantage with this configuration?
swampthing1034 8 months ago
@swampthing1034
Yes, this was done just for the heck of it, although my son would have squeezed it onto a go-kart somehow, if it worked really well.
ChargerMiles007 8 months ago
How was the engine running with no sparkplug wire in the photo??? Btw the engine will run alot nicer if you were to attach the charger directly to the block, then have the carb on the intake of the turbo, more vacuum= better performance plus it doesn't run lean because the supercharger may try to push the fuel back into the fuel bowl. You did do a good job thoe :)
MrTpengineer 1 year ago
@MrTpengineer
We haven't actually ran this new configuration yet, I just did the vid to show the engine under construction.
There is a fuel pump to overcome the boost pressure, to maintain supply to the carb.
ChargerMiles007 1 year ago
@ChargerMiles007 Ok, just checking. I'm thinking about doing this with my v-twin 14hp briggs from the 80's.
MrTpengineer 1 year ago
@MrTpengineer
Hey, send me a vid of it if you go for it! :)
ChargerMiles007 1 year ago
@ChargerMiles007 Sure :)
MrTpengineer 1 year ago
nice build. you will need gears to get the impeller to turn fast enough though. 6 to 1 is not enough without gears. if you look at centrifugal super charger made for a vehicle, you will notice they have gearing that further increases the ratio made by the pulleys. tell you son to becareful. I strapped one of these (5hp b&s) to a push scooter when i was 15 and the exposed gears ended up taking a bite size hunk of meat out of my thigh. the throttle had stuck and i was doin 30mph down a dead end st
joshuaTNE 1 year ago
@joshuaTNE
Thanks for the comment.
Man that must have been nasty being attacked by the gears!
stickt throttles can lead to some hair raising rides, I have had 1 or 2 of those myself!
ChargerMiles007 1 year ago
It don't git much more awesome than that man... WOW!!! I'd love to see it working too.... Great usage of the belt. I saw another vid of a guy who used the exhaust from the engine but a car turbo. obviously not nearly enough flow to make good use of the turbo, but your idea is much better and more sound.... Great idea and workmanship!
Landotter1 1 year ago
@Landotter1
Thanks! My son actually did all of this, one of these days we will get around to firing it up in this configuration :)
(After all the snow melts!!!)
ChargerMiles007 1 year ago
do you have a running video of this? i really want to see it running
30GB 1 year ago
@30GB
I do have a vid of it running, but it uses a suck thru carb. on that vid, and it wasn't taken with a digital camera, so I would have to take a vid of my TV screen! But I guess I could do that, just to prove that it has indeed been run. I will see if I can locate the VHS tape of it :)
My son built this one, and we have yet to run it in this configuration.
ChargerMiles007 1 year ago
@ChargerMiles007 if you can that would be great because im planning on doing it on a 8hp briggs with my turbo but convert it to belt since its the same size as this one
30GB 1 year ago
@30GB
I will make a note to myself to check that out, since I have so much going on that I forget stuff! :( If you don't see a vid within a week, send me a message to wake me up! :)
ChargerMiles007 1 year ago
@ChargerMiles007 can we have a video of it then ??
ashley118118 1 year ago
@ashley118118
Nope, still haven't started it up in this configuration, but I will send you a vid I put on a week ago of it running the old way we built it.
ChargerMiles007 1 year ago
Also the engine cover always made the briggs look mor intimidating. Nice job on the build.
curtbarile 1 year ago
@curtbarile
Thanks, I agree, the engine looks better with the cover.
All the credit for this engine goes to my son, as he built this one.
ChargerMiles007 1 year ago
DUDE!!! Your colling system is missing, YES it is cool up there,BUT!!!!!! The cylinder head is lacking a fly wheel cover and is in fact is the engine cooling system
curtbarile 1 year ago
@curtbarile
Yes, you are right, I left the cover shroud off for the video.
We may even run it this way for a very short time, but YES, the cover is needed to run the engine for more than a few seconds.
ChargerMiles007 1 year ago
when u starting it?
freakboy100101 2 years ago
Hopefully in the spring, around here, that translates to May! :((
ChargerMiles007 2 years ago
damn why not sooner? lol im dyin to see if it works.
freakboy100101 2 years ago
Its still Winter here Dude!
You know a Canadian winter.
I know it has been mild, but generally you have to play around with an engine a bit to get it tuned right, thats not nice to do at 20 some degrees F. , and thats on a warm day. It would probably be OK to fire it up at 50F., but that is going to be a ways off yet!
Oh, trust me it WILL work, if I have to use mechanical fuel injection (me spraying gas into the blower inlet with an oil can!!! :)) While wearing gloves and safety glasses!
ChargerMiles007 2 years ago
yeah i hate winter id never be able to live in canada. i love the snow but i hate not being able to do anything.. and that gives me a idea...... spray a tiny bit of nos into the inlet ahaha
freakboy100101 2 years ago
Will the wee fuel pump raise the fuel pressure above boost even with a pressurized tank? I think that could be an issue. It should work in downdraft mode. If you run it please put a pressure gage on the intake!!! ;) I hope it runs.
BlakeMason2 2 years ago
I will see what we can do.
ChargerMiles007 2 years ago
thanks mike, i hope the idea doesn't wreck the sleeve valve motor.
Xantec 2 years ago
ingenious, I like that. how well will it work on the SV briggs and stratton motor?
Xantec 2 years ago
nice engine!!
are you going to use it for something?
coshyno 2 years ago
Hard to say, but it does have a cetrifugal clutch on it, so it would fit our go kart :))
ChargerMiles007 2 years ago
try the sleeve valve on another go kart, see how it compares
Xantec 2 years ago
awesome! can't wait to see it run!
SuperKONR 2 years ago
Yea, it should be pretty cool :))
It will definitely wake up the neighborhood!
ChargerMiles007 2 years ago
That is one cool setup there, I cant wait to hear and see it run!
More350Power 2 years ago