no replacement for displacement!!! stroking a small block to a 383 makes more power than a 455 !!no way inhell power is obtained by cylinder head selection camshaft and intake manifolds !!!! oh pontiac already has an advantage on that 14 degree valve angle versus 23degree put it in short terms a pontiac engine is no slouch !!!
if its the stock vette motor,and its just been stroked with different rods and a 400 crank,then definately the vette would beat the gto off the line.u gotta keed in mind that the stock vette motor,although only puts out 230hp,it puts out 350 foot pounds of torque.that will get it off the line real quick.then if you can stroke the motor with a different rods and crank,it just makes it that much faster.
a solid roller cam will give you a lot more horsepower and torque then a lil hydraulic cam...has to do with the air and fuel and lifters and shit..im not a gear head like that..i just kno i have one in my 383 ..550 horse pump gas motor
455 big blocks overheat alot as will most big blocks. my buddy had one in his '70 delta 88 (lead sled) def had alot of torque not too much top end as you dont want that car going too fast anyways. but in a drag i would take the 455
solid roller means it has a cam that used solid lifters that have rollers that touch the cam. less friction= less heat which in turn= more power. hydraulic means that the lifters have springs in them and have solid bases with no roller.
a solid roller camshaft will let you have a more usable power range depending on the lift/duration of the cam itself. but the engine has to be built around the cam/compression ratio combination and if you want to stroke it or anything along those lines will affect what your usable rpm range is. generally the more displacement the engine has i.e. a 572 wont like to rev over probably 5,700 where a 331 smallblock if built right will rev to 10,000+ with forged internals
Not really...a 455 has TONS of low end torque, and were never designed for high end revs, whereas the 383 thrives on it. Off the line, from a dead stop, the gto would launch harder (in theory) but the 383 would be at full power faster. But thats saying it was a potiac 455, not a Keith Black or other aftermarket brand.
It seems that when I would run a SBC (& imports like Holden GTO) they want to do it at 30+mph start, cuz they dont have the bottom end, tires, low gears and so on. Most mild sbc make power in the 4-6grand area vs most mild PMD engines run in the off idle to 5,800 area. This is where PMD engines get bad name, as most builds lack good rods add heavy pistons on factory rods & drive them like SBCs beyond 6G and boom! The key is to use PMDs better rod ratio & tall deck engine just dont over rev.
soo true haha! i blew up my last engine by revving it to 6200 and it had forged pistons and balanced and blueprinted and bla bla. stock cast rods at that rpm turned an egg shape and gripped the bearings and spun 2 of them. damn cast junk haha. now im on to the eagle forged h beam rods and a stroker forged crank so i can turn 6k safely!
My first engine was a 30. 400 in 98 nobody had PMD forged rods.
So I went to my local speed shop "Pro-Formance" & asked them what I could do about my rods, I learned how to "beam" the rods making them a little better then stock.
Got a few books, & after 48 hours @ 500+ in my oven I beamed & polished my own rods then had them rebuilt & shot peened.
It went high a few times 6000+ but never went all ARP bolts & studs, I still have that engine, its a spare.
well now i have a stock .30 400 block with a comp cams hydraulic roller cam with 300 duration and the mid .500s lift, probably around .550 with the 461 stroker kit with h beam rods and its going to have custom dished diamond pistons and the 1972 4xh heads with 2.11 1.66 valves and triple valve springs and hardened intake and exhaust seats. performer rpm manifold and a quick fuel technologies 750 carb that i now have to rejet to about an 840-850 for the increased cubic inches.. all ARP studded
This only thing I see holding you back in the 4x heads, even the best porting on any factory PMD head (less RA V) will not flow like even a stock aftermarket.
You know its really upsetting to see News stand mags showing people taking out their PMD engines for LS engines, as if some how the redesign didnt make it a SBC. Even more so when so much for PMD is around now, blocks heads even a Hemi head for PMD engines, its a crime.
yeah like you said basically any stock PMD head is really limited by its design the 670 castings for example, closed chamber etc.. pontiac did also make a ram air 5 head also, it looks dangerously close to a LS6 head and performs almost identically to one. google it haha! ill end up with a set of KRE aluminum heads when i can afford them. but i have mass respect for the LSx series engines also. crazy potential after the stock hypereutectic pistons are swapped out for forged units.
The 3rd Gen LS SBC may be the best SB engine ever. I dont like seeing them in real Pontiacs tho, its still a Chevy.
I am looking into getting Hemi Heads when I can coin up for them, I believe they have the potential of being the highest flowing PMD heads that have water jackets!
I ported & polished my #13 RAMAIR IIIs on my first engine, even had them shaved full with a full Erson spring kit, as well I had new stainless 2.11, 1.77s. I burned up 2 Dremels doing those heads LOL.
@ramairgto72 i have yet to do any porting work on any pontiac heads but i have done 2 sets of camelhump chevy heads for a friend that has a 64 impala and a 67 nova. could you give me a link to the pontiac hemi heads because id love to check them out! but your right the LS series are still chevy engines and its a shame when people swap new engines in muscle cars because "it makes them more streetable" the LS6 chevelle back in 1970 had a 11.5 to 1 454 a 4 speed and 4.11gears and were dailys
Last I looked they were working on "street heads" right now they only have race heads wx3(dot)krepower(dot)com/KRE_billet_aluminum_heads(dot)htm
Even a simple "gasket port match" is worth doing, just rem not to "polish" the intake side, it pools the fuel on the walls.
It's a dam shame seeing LS SBCs going into real Pontiac, you can build a PMD engine to have the manners of a the LS engine, it all has to do with Fuel injection.
The PMD engine also has a superior TQ stroke over any SBC!
thats not exactly true it all depends on the weight of the car,what the engine was built for, and where your racing, 455 are torque engines 383 can also have good low end torque or top end horsepower it all depends.
that's not even remotely true. the 383 is obviously an aftermarket engine, considering all corvettes are 350ci's from factory, a stock pontiac 455 isn't going to beat a 383 stroker vette.
i personally didn't see how the GTO was faster in this video, i watched the gto launch, and i saw that the vette was faster.
i would choose a gto over a vette anyday, but that doesn't mean the vette isn't faster.
in compasiron, the vette is so much lighter with the 383, than the gto with a 455.
A stock 455 HO Pontiac made 500 ft lbs of torque in 1970. Torque is what moves a car. A built 455 will smoke a 383 small block stroker. There is no substitute for cubic inches.
Get this. A stock Buick 455 puts out 510ft lb or torque. Now a 383 stroker being either a Short rod (5.5 rods (idle-5500rpm)) or a Long rod (5.7 rods(whatever your cam pulls to) A small block stroker has an ultrafast rev compared to a big block which has a slow rev until it gets wound up.
a 383 stroker, built for speed, is a hell of a lot faster than any stock 455 could ever hope to be, if for nothing else the shorter crank will allow the 383 to gain RPMs(speed) faster than the 455, not to mention the vette probably weighs 600-700 pounds less than that GTO. You COULD build a 455 that would eat the 383 for breakfast, though
I kinda agree with you because you said - a 383 "built for speed" can beat a "stock" 455 (as in not an equal test). But stock against stock, or built "equally" for speed - the 455 will make more power. The 455s key source of power IS THAT long stroke not requiring it to rev as high to equal or beat others in power (especially torque). Yes the 383 revs up quicker & higher with a shorter stroke - but IT MUST rev higher to equal the 455, & it's BECAUSE of that short stroke.
Like I said before - if a 400sb is built equal to a 383sb stroker, the 400 will have slightly more power. Because a 383 is a 400 debored 17 cubes. The 400s weren't as reliable & blew head gaskets because the 400 bore was too big for a SB. If all I could have is a SB, I'd have a 383. But it would be because that is the largest/perfect CID displacement the block can accomodate & be durable/reliable. But for power a - 400 will make slightly more (as in 17 cubes more) if built equal.
& I'm not saying every engine 17 cubes larger will win. But WE ARE comparing oranges to oranges here - chevy small blocks that can all use the same heads,cams, etc. When talking the same block, the only way a smaller motor could win when built equal is - if it had a way better bore to stroke ratio - like how 327s run real well (or maybe better) with 350s if built equal. But a 400 has a slightly better ratio than a 383, so it has the 383 beat for cubes, and the ratio too.
Didn't look like a race to me or sound like one either. More like camera mans car speeds up then lets off the throttle then the vette does a pull and lets off. If that's a true stroker vette it will kill a 455-67 GTO. Vettes are way lighter and have better (independent) suspension. Strokers will produce more power than a 455. I have proven all this myself personally.
Well, I was there you were not. It was a race, a short race nonetheless. We both hit it at the same time. On motor my car runs 11.5@118 on Nitrous 10.8@121. That was a motor run. My GTO weight 3480lbs.
You're a moronic idiot. You think the word "stroker" causes a 383 to make more power than much larger engines. The 383 makes the same power as a 383 (not more) if GM had built it. If built exactly identical to a 400 & 350, the 383 would produce hp in the middle of those two. A stroker is made by putting a 400 crank in a 350 & boring it .30 over. It is a 400 debored 17 cubes. But you've personally proven it makes more hp/torque than a 455--you're having wet dreams.
85 corvettes were less than 300hp. So less than 1 hp per cube. Mr. Yuppie dumbass who stroked it 33 cubes, gained less than 33hp. The 455 has more cubes, more intake, more cam, better heads, bigger valves, a 800cfm q-jet carb at the least. Even if the 455 was de-cubed to a 383, the 383 would lose because it does not even make over 300hp. The 455 decubed to 383 would still make at least 360hp - i.e. 389v8 GTOs were rated around 360hp in the same block the 455 used.
@dagomob You are an idiot. I have proven this personally! That's funny! My 455 has 700 horse in present condition. My old 383 stroker was 500 horse. You are an idiot!
@peak199 No. Your the idiot here. You can think you've proven personally whatever you want and all that you want. You can make all the claims you want about all this horse power that you made and all the horse power you didn't make. Your obviously just alittle punk living in your mothers basement, unemployed and beating off in front of the computer everyday. You don't know anything about the math and physics and science involved with building a tricked out cube. So your the idiot here.
@dagomob A tricked out cube. Lets see.In 1985 I was in engine building trade school and built my first pontiac 400.26 years later,I am still driving goats and firebirds( and don't forget my new SLS AMG). My cars are worth more than your house,or your parents house you little worm
Ahhh. Pay attention to the video. I'm driving the 67 GTO. Did you not see the race between him and me near the end?? The chevelle in the beginning was just playing with the vette.
Comment removed
TheBob455 1 year ago
no replacement for displacement!!! stroking a small block to a 383 makes more power than a 455 !!no way inhell power is obtained by cylinder head selection camshaft and intake manifolds !!!! oh pontiac already has an advantage on that 14 degree valve angle versus 23degree put it in short terms a pontiac engine is no slouch !!!
TheBob455 1 year ago
i CAN SEE YOU ATE SOME VETT FOR A SNACK NICE LITTLE BLAST !!!
deannaber 1 year ago
is this in OC, maryland, i swear it looks like it is and probably during Cruizin' weekend
my87z28 1 year ago
too bad thats not a 67 its a 68 or 69 the lights are a dead giveaway
polak2817 2 years ago
@polak2817
the first car in the video is a 68 or 69 chevelle ss big block car
hurstmotox67 2 years ago
Haha...sure the vette felt like an ass showing off like that, and getting handed to from the jump. Nice kill. Long live the GOAT!!!
BassnEclipse 2 years ago
if its the stock vette motor,and its just been stroked with different rods and a 400 crank,then definately the vette would beat the gto off the line.u gotta keed in mind that the stock vette motor,although only puts out 230hp,it puts out 350 foot pounds of torque.that will get it off the line real quick.then if you can stroke the motor with a different rods and crank,it just makes it that much faster.
verylongfamilylife 2 years ago
a solid roller cam will give you a lot more horsepower and torque then a lil hydraulic cam...has to do with the air and fuel and lifters and shit..im not a gear head like that..i just kno i have one in my 383 ..550 horse pump gas motor
123nova 2 years ago
455 big blocks overheat alot as will most big blocks. my buddy had one in his '70 delta 88 (lead sled) def had alot of torque not too much top end as you dont want that car going too fast anyways. but in a drag i would take the 455
jdymes101101 2 years ago
it all depends on how the 383 is built....if its a 12 to 1 solid roller motor or a 9 to 1 hydraulic cam motor hahah ... and i hate corvettes
123nova 2 years ago
whats the difference between a ssolid roller motor and a hydraulic cam motor?
sk8forlife90 2 years ago
solid roller means it has a cam that used solid lifters that have rollers that touch the cam. less friction= less heat which in turn= more power. hydraulic means that the lifters have springs in them and have solid bases with no roller.
hurstmotox67 2 years ago
which one allows the rpm's to go higher?
sk8forlife90 2 years ago
@sk8forlife90
a solid roller camshaft will let you have a more usable power range depending on the lift/duration of the cam itself. but the engine has to be built around the cam/compression ratio combination and if you want to stroke it or anything along those lines will affect what your usable rpm range is. generally the more displacement the engine has i.e. a 572 wont like to rev over probably 5,700 where a 331 smallblock if built right will rev to 10,000+ with forged internals
hurstmotox67 2 years ago
unless the vette has a body kit, thats not an 85.
Jaidawg80 2 years ago
I loooooooooooooove the sound of those V8 engines.
MegaTronn 3 years ago
thats not even fair. ne 455 would kill a 383
dynastyzzzzz 3 years ago
Not really...a 455 has TONS of low end torque, and were never designed for high end revs, whereas the 383 thrives on it. Off the line, from a dead stop, the gto would launch harder (in theory) but the 383 would be at full power faster. But thats saying it was a potiac 455, not a Keith Black or other aftermarket brand.
cmfg600 3 years ago
It seems that when I would run a SBC (& imports like Holden GTO) they want to do it at 30+mph start, cuz they dont have the bottom end, tires, low gears and so on. Most mild sbc make power in the 4-6grand area vs most mild PMD engines run in the off idle to 5,800 area. This is where PMD engines get bad name, as most builds lack good rods add heavy pistons on factory rods & drive them like SBCs beyond 6G and boom! The key is to use PMDs better rod ratio & tall deck engine just dont over rev.
ramairgto72 3 years ago
soo true haha! i blew up my last engine by revving it to 6200 and it had forged pistons and balanced and blueprinted and bla bla. stock cast rods at that rpm turned an egg shape and gripped the bearings and spun 2 of them. damn cast junk haha. now im on to the eagle forged h beam rods and a stroker forged crank so i can turn 6k safely!
hurstmotox67 2 years ago
My first engine was a 30. 400 in 98 nobody had PMD forged rods.
So I went to my local speed shop "Pro-Formance" & asked them what I could do about my rods, I learned how to "beam" the rods making them a little better then stock.
Got a few books, & after 48 hours @ 500+ in my oven I beamed & polished my own rods then had them rebuilt & shot peened.
It went high a few times 6000+ but never went all ARP bolts & studs, I still have that engine, its a spare.
What do you have?
ramairgto72 1 year ago
well now i have a stock .30 400 block with a comp cams hydraulic roller cam with 300 duration and the mid .500s lift, probably around .550 with the 461 stroker kit with h beam rods and its going to have custom dished diamond pistons and the 1972 4xh heads with 2.11 1.66 valves and triple valve springs and hardened intake and exhaust seats. performer rpm manifold and a quick fuel technologies 750 carb that i now have to rejet to about an 840-850 for the increased cubic inches.. all ARP studded
hurstmotox67 1 year ago
@hurstmotox67
This only thing I see holding you back in the 4x heads, even the best porting on any factory PMD head (less RA V) will not flow like even a stock aftermarket.
You know its really upsetting to see News stand mags showing people taking out their PMD engines for LS engines, as if some how the redesign didnt make it a SBC. Even more so when so much for PMD is around now, blocks heads even a Hemi head for PMD engines, its a crime.
ramairgto72 1 year ago
@ramairgto72
yeah like you said basically any stock PMD head is really limited by its design the 670 castings for example, closed chamber etc.. pontiac did also make a ram air 5 head also, it looks dangerously close to a LS6 head and performs almost identically to one. google it haha! ill end up with a set of KRE aluminum heads when i can afford them. but i have mass respect for the LSx series engines also. crazy potential after the stock hypereutectic pistons are swapped out for forged units.
hurstmotox67 1 year ago
@hurstmotox67
The 3rd Gen LS SBC may be the best SB engine ever. I dont like seeing them in real Pontiacs tho, its still a Chevy.
I am looking into getting Hemi Heads when I can coin up for them, I believe they have the potential of being the highest flowing PMD heads that have water jackets!
I ported & polished my #13 RAMAIR IIIs on my first engine, even had them shaved full with a full Erson spring kit, as well I had new stainless 2.11, 1.77s. I burned up 2 Dremels doing those heads LOL.
ramairgto72 1 year ago
@ramairgto72 i have yet to do any porting work on any pontiac heads but i have done 2 sets of camelhump chevy heads for a friend that has a 64 impala and a 67 nova. could you give me a link to the pontiac hemi heads because id love to check them out! but your right the LS series are still chevy engines and its a shame when people swap new engines in muscle cars because "it makes them more streetable" the LS6 chevelle back in 1970 had a 11.5 to 1 454 a 4 speed and 4.11gears and were dailys
hurstmotox67 1 year ago
Last I looked they were working on "street heads" right now they only have race heads wx3(dot)krepower(dot)com/KRE_billet_aluminum_heads(dot)htm
Even a simple "gasket port match" is worth doing, just rem not to "polish" the intake side, it pools the fuel on the walls.
It's a dam shame seeing LS SBCs going into real Pontiac, you can build a PMD engine to have the manners of a the LS engine, it all has to do with Fuel injection.
The PMD engine also has a superior TQ stroke over any SBC!
ramairgto72 1 year ago
@hurstmotox67 good luck finding or buying a ram air V head!
peak199 1 year ago
thats not exactly true it all depends on the weight of the car,what the engine was built for, and where your racing, 455 are torque engines 383 can also have good low end torque or top end horsepower it all depends.
knowledge3425 3 years ago
that's not even remotely true. the 383 is obviously an aftermarket engine, considering all corvettes are 350ci's from factory, a stock pontiac 455 isn't going to beat a 383 stroker vette.
i personally didn't see how the GTO was faster in this video, i watched the gto launch, and i saw that the vette was faster.
i would choose a gto over a vette anyday, but that doesn't mean the vette isn't faster.
in compasiron, the vette is so much lighter with the 383, than the gto with a 455.
WickedlyCold 2 years ago
@WickedlyCold since when are all corvettes 350 s from the factory?
peak199 7 months ago
My 69 GTO eats Vets & Mustangs for breakfast
Carlsbiz 3 years ago 5
@Carlsbiz my ls7 vette will systematic destroy my car is genicide on wheels
gallardowilliam 7 months ago
@Carlsbiz my ls7 vette will systematicly destroy my car is genicide on wheels
gallardowilliam 7 months ago
omfg. Give me that got damn gto. now.
VladimirLemLem 3 years ago
Very cool! Both great cars!
MikeShread 3 years ago
itz all cumz down 2 torque sukaz
duranesjoker 3 years ago
I like reading what people, who almost know what they're saying, actually believe.
uyesu 4 years ago
nickivee, i didnt think you did that on the street ! Doug
yuk5664 4 years ago
A stock 455 HO Pontiac made 500 ft lbs of torque in 1970. Torque is what moves a car. A built 455 will smoke a 383 small block stroker. There is no substitute for cubic inches.
MRK4JC 4 years ago 2
Get this. A stock Buick 455 puts out 510ft lb or torque. Now a 383 stroker being either a Short rod (5.5 rods (idle-5500rpm)) or a Long rod (5.7 rods(whatever your cam pulls to) A small block stroker has an ultrafast rev compared to a big block which has a slow rev until it gets wound up.
77TransAm455ci 4 years ago
Yes, that's true but, a big block doesn't have to get wound up to make power.
MRK4JC 4 years ago
big blocks dont need wound up.
73DrtSprt 4 years ago
dont you mean the 5.7 rods and the 6.0 rods
ozzmanluvsiron 3 years ago
a 383 stroker, built for speed, is a hell of a lot faster than any stock 455 could ever hope to be, if for nothing else the shorter crank will allow the 383 to gain RPMs(speed) faster than the 455, not to mention the vette probably weighs 600-700 pounds less than that GTO. You COULD build a 455 that would eat the 383 for breakfast, though
RhettaDaddy 4 years ago
I kinda agree with you because you said - a 383 "built for speed" can beat a "stock" 455 (as in not an equal test). But stock against stock, or built "equally" for speed - the 455 will make more power. The 455s key source of power IS THAT long stroke not requiring it to rev as high to equal or beat others in power (especially torque). Yes the 383 revs up quicker & higher with a shorter stroke - but IT MUST rev higher to equal the 455, & it's BECAUSE of that short stroke.
1967PmdGto 4 years ago
Like I said before - if a 400sb is built equal to a 383sb stroker, the 400 will have slightly more power. Because a 383 is a 400 debored 17 cubes. The 400s weren't as reliable & blew head gaskets because the 400 bore was too big for a SB. If all I could have is a SB, I'd have a 383. But it would be because that is the largest/perfect CID displacement the block can accomodate & be durable/reliable. But for power a - 400 will make slightly more (as in 17 cubes more) if built equal.
1967PmdGto 4 years ago
& I'm not saying every engine 17 cubes larger will win. But WE ARE comparing oranges to oranges here - chevy small blocks that can all use the same heads,cams, etc. When talking the same block, the only way a smaller motor could win when built equal is - if it had a way better bore to stroke ratio - like how 327s run real well (or maybe better) with 350s if built equal. But a 400 has a slightly better ratio than a 383, so it has the 383 beat for cubes, and the ratio too.
1967PmdGto 4 years ago
Didn't look like a race to me or sound like one either. More like camera mans car speeds up then lets off the throttle then the vette does a pull and lets off. If that's a true stroker vette it will kill a 455-67 GTO. Vettes are way lighter and have better (independent) suspension. Strokers will produce more power than a 455. I have proven all this myself personally.
dagomob 4 years ago
Well, I was there you were not. It was a race, a short race nonetheless. We both hit it at the same time. On motor my car runs 11.5@118 on Nitrous 10.8@121. That was a motor run. My GTO weight 3480lbs.
nikivee 4 years ago 9
@nikivee nice work you did not pull away from that corvette you litteraly ripped away from that vette!!!
TheBob455 1 year ago
@nikivee Plus them 455's make more torque than those sb chevs. Nice Hot Rod!
69amcya70 11 months ago
You're a moronic idiot. You think the word "stroker" causes a 383 to make more power than much larger engines. The 383 makes the same power as a 383 (not more) if GM had built it. If built exactly identical to a 400 & 350, the 383 would produce hp in the middle of those two. A stroker is made by putting a 400 crank in a 350 & boring it .30 over. It is a 400 debored 17 cubes. But you've personally proven it makes more hp/torque than a 455--you're having wet dreams.
1967PmdGto 4 years ago
85 corvettes were less than 300hp. So less than 1 hp per cube. Mr. Yuppie dumbass who stroked it 33 cubes, gained less than 33hp. The 455 has more cubes, more intake, more cam, better heads, bigger valves, a 800cfm q-jet carb at the least. Even if the 455 was de-cubed to a 383, the 383 would lose because it does not even make over 300hp. The 455 decubed to 383 would still make at least 360hp - i.e. 389v8 GTOs were rated around 360hp in the same block the 455 used.
1967PmdGto 4 years ago
@dagomob You are an idiot. I have proven this personally! That's funny! My 455 has 700 horse in present condition. My old 383 stroker was 500 horse. You are an idiot!
peak199 1 year ago
@peak199 No. Your the idiot here. You can think you've proven personally whatever you want and all that you want. You can make all the claims you want about all this horse power that you made and all the horse power you didn't make. Your obviously just alittle punk living in your mothers basement, unemployed and beating off in front of the computer everyday. You don't know anything about the math and physics and science involved with building a tricked out cube. So your the idiot here.
dagomob 11 months ago
@dagomob A tricked out cube. Lets see.In 1985 I was in engine building trade school and built my first pontiac 400.26 years later,I am still driving goats and firebirds( and don't forget my new SLS AMG). My cars are worth more than your house,or your parents house you little worm
peak199 7 months ago
The tank I drive only weighs 3480lbs.
nikivee 4 years ago
Ahhh. Pay attention to the video. I'm driving the 67 GTO. Did you not see the race between him and me near the end?? The chevelle in the beginning was just playing with the vette.
nikivee 4 years ago
What have you done to your 455 to get it to run like that? I have a 70 w/463 and it doesn't run like yours. Are you in California?
MRK4JC 4 years ago
gotta love it when a 'Vette gets eaten buy a tank, good job.
454440 4 years ago
That looks more like a 68 chevelle to me. It aint the GTO.
jhschmidMD4 4 years ago