foxbody stang versus 79 corvette
11-22-2011, 12:47 AM
#1
foxbody stang versus 79 corvette buddy of mine is putting the finishing touches on his foxbody stang, used to be a 302 but he went out and bought a new engine now it is a 327 stroker with gt40 heads and a paxton 2000 supercharger on 5psi.
i just bought a 79 vette with a 383 stroker and 700r4 trans just built last month so both our engines are brand new. i have a quick fuel 780 carb and a comp cam at 224/230 509"/516" at 112 lsa. supposedly the shop that built it dynoed the motor at 550 to the crank. although these charts were lost by the seller so its unconfirmed.
were fairly competitive so if we were to line up what would happen? would my vette have enough displacement to hang with his blower? and if not the vette how bout my ls1 ss with ssra ram air/intake/headers/afr 210 heads and a cheater v.3 cam?
i just bought a 79 vette with a 383 stroker and 700r4 trans just built last month so both our engines are brand new. i have a quick fuel 780 carb and a comp cam at 224/230 509"/516" at 112 lsa. supposedly the shop that built it dynoed the motor at 550 to the crank. although these charts were lost by the seller so its unconfirmed.
were fairly competitive so if we were to line up what would happen? would my vette have enough displacement to hang with his blower? and if not the vette how bout my ls1 ss with ssra ram air/intake/headers/afr 210 heads and a cheater v.3 cam?
11-22-2011, 11:01 AM
#6
ha ha if you read my post the seller claims the 500 im the one whos skeptical. lost dyno sheets is fishy to me as well. i will take it to a dyno myself and find out im not sitting here bragging ofmg i got 500 horse. i dont know what i have yet.
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11-22-2011, 02:37 PM
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Are you positive he has a stroker? not too many will build one and then put small heads on it. that defeats the purpose of stroking it to begin with. I had a 331 with alum. afr 185's, unknown custom cam and it made 343rwhp through a c4, with I think with his setup he should be in the ranger of 325-350rwhp. for the fact even he has small heads the 5psi does help a little.
Your 383 setup? what heads are on it, please say dart or etc and not double hump? I think your ls1 will have a better chance by the mod list you gave on it.
but this is all my opinions, only 1 way to really know who's faster!!!
Your 383 setup? what heads are on it, please say dart or etc and not double hump? I think your ls1 will have a better chance by the mod list you gave on it.
but this is all my opinions, only 1 way to really know who's faster!!!
11-22-2011, 03:14 PM
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11-22-2011, 03:18 PM
#11
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My ’69 Vette is similar to your combo. 383, AFR 195, hyd flat tappet, 233/241 .504, /525. 850 on an Air Gap. It had 327 rwhp through a T 56. A G-Tech gave it a trap speed of 112. After those numbers I switched to a larger solid roller but don’t have new numbers. It’s not bad for a well-mannered for a gen I but this engine is the primary reason I’m switching to LS power for most projects now.
If you’re at 550 hp you’d spank my Vette, I say run yours against the Ford.
If you’re at 550 hp you’d spank my Vette, I say run yours against the Ford.
11-22-2011, 03:55 PM
#12
Staging Lane
My ’69 Vette is similar to your combo. 383, AFR 195, hyd flat tappet, 233/241 .504, /525. 850 on an Air Gap. It had 327 rwhp through a T 56. A G-Tech gave it a trap speed of 112. After those numbers I switched to a larger solid roller but don’t have new numbers. It’s not bad for a well-mannered for a gen I but this engine is the primary reason I’m switching to LS power for most projects now.
If you’re at 550 hp you’d spank my Vette, I say run yours against the Ford.
If you’re at 550 hp you’d spank my Vette, I say run yours against the Ford.
11-22-2011, 04:59 PM
#13
sounds like you will get hammered.
i've seen h/c stock short fox bodies trap 115. if his has all that other **** i'd hope to god it would at least be that fast.
your camaro would most likely annihilate the stang, but your vette...eeehhh not so much. ever ran your slowmaro? race the vette and your camaro to get a baseline. i'd almost bet money that your gen 1 motor doesn't make anywhere near 550 hp, even at the crank. even dem ported and polished 041 heads won't be doing that.
i've seen h/c stock short fox bodies trap 115. if his has all that other **** i'd hope to god it would at least be that fast.
your camaro would most likely annihilate the stang, but your vette...eeehhh not so much. ever ran your slowmaro? race the vette and your camaro to get a baseline. i'd almost bet money that your gen 1 motor doesn't make anywhere near 550 hp, even at the crank. even dem ported and polished 041 heads won't be doing that.
11-22-2011, 09:47 PM
#14
You are thinking the same thing I'm thinking: if this guy has 550rwhp then that motor of his must make 650-700 crank horsepower. BS. Your setup on probably makes 425-450 crank horsepower which would put you in the mid to high 300's at the wheel. Right where that mustang probably is. Should be a good race though. Any idea of what your vette weighs? I don't remember what there stock weights were...
i said 550 at crank. not 550 at wheels. so at wheels you talking 450ish IF it is a true 550 motor. and the reason its in my sig to answer the other guy is that the guy i bought it from is a trusted friend of mine who is also a fellow service member. he claims to have legit lost the papers but it was at that number. again to everyone calling bullshit im going to get it dynoed jeez get off my back. it does pull harder and appears faster than my ls1 camaro so the 550 at the crank seems true so far, but again one way to know for sure. as far as heads no double hump heads are a waste of money IMO. they are the afr heads and his cam is not a b cam its the f cam or close to it. we will race as soon as he gets his motor running right now after all the work we put into building it the dam thing wont crank. his gt40 heads? idk why he put em on its his car not mine. im installing a 3200 stall this weekend so that should help, his car is the 5 speed tranny.
11-22-2011, 09:55 PM
#15
Are you positive he has a stroker? not too many will build one and then put small heads on it. that defeats the purpose of stroking it to begin with. I had a 331 with alum. afr 185's, unknown custom cam and it made 343rwhp through a c4, with I think with his setup he should be in the ranger of 325-350rwhp. for the fact even he has small heads the 5psi does help a little.
Your 383 setup? what heads are on it, please say dart or etc and not double hump? I think your ls1 will have a better chance by the mod list you gave on it.
but this is all my opinions, only 1 way to really know who's faster!!!
Your 383 setup? what heads are on it, please say dart or etc and not double hump? I think your ls1 will have a better chance by the mod list you gave on it.
but this is all my opinions, only 1 way to really know who's faster!!!
11-22-2011, 10:33 PM
#16
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Ive seen a few and I do mean a few GT40 set ups make close to 300 rwhp most are around 250-260 so with a blower on 5 psi he might see 350 rwhp with the extra displacement if the heads are worked over pretty good, but I wouldnt be shocked if it didnt make 320 to the back tire. OP you have a fast ls1 and you should at least have an idea of the power the vette makes if you have driven it. If the vette has junk heads then my money is on the mustang but the ls1 would rape all.
11-22-2011, 10:36 PM
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i said 550 at crank. not 550 at wheels. so at wheels you talking 450ish IF it is a true 550 motor. and the reason its in my sig to answer the other guy is that the guy i bought it from is a trusted friend of mine who is also a fellow service member. he claims to have legit lost the papers but it was at that number. again to everyone calling bullshit im going to get it dynoed jeez get off my back. it does pull harder and appears faster than my ls1 camaro so the 550 at the crank seems true so far, but again one way to know for sure. as far as heads no double hump heads are a waste of money IMO. they are the afr heads and his cam is not a b cam its the f cam or close to it. we will race as soon as he gets his motor running right now after all the work we put into building it the dam thing wont crank. his gt40 heads? idk why he put em on its his car not mine. im installing a 3200 stall this weekend so that should help, his car is the 5 speed tranny.
11-23-2011, 12:19 AM
#18
Staging Lane
Good luck op. I've built and helped other builds on 383 stroker builds with various heads including AFR, Trick Flow, massively ported 2.02 fuely heads, and Dart Pro heads. To get that hp on pump gas you will need to have the heads capable of 300+cfm on the intake, 10 to 10.5 to 1 compression, big solid or roller or solid roller cam, at a minimum a Vic Jr intake (ported preferably), 850+ square bore carb, full aftermarket ignition (crank trigger'd preferably- at that compression you can't take chances on timing or spark strength/duration).
I've seen 600+ crank hp 383 setups but there's a ton of time and money into them, and they are NOT street reliable.
I've seen 600+ crank hp 383 setups but there's a ton of time and money into them, and they are NOT street reliable.
11-23-2011, 01:25 AM
#20
Good luck op. I've built and helped other builds on 383 stroker builds with various heads including AFR, Trick Flow, massively ported 2.02 fuely heads, and Dart Pro heads. To get that hp on pump gas you will need to have the heads capable of 300+cfm on the intake, 10 to 10.5 to 1 compression, big solid or roller or solid roller cam, at a minimum a Vic Jr intake (ported preferably), 850+ square bore carb, full aftermarket ignition (crank trigger'd preferably- at that compression you can't take chances on timing or spark strength/duration).
I've seen 600+ crank hp 383 setups but there's a ton of time and money into them, and they are NOT street reliable.
I've seen 600+ crank hp 383 setups but there's a ton of time and money into them, and they are NOT street reliable.