Horsepower and CC's
03-24-2002, 09:13 AM
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Car: 1983 Pontiac Firebird
Engine: 400HP 350
Transmission: 700R4
Axle/Gears: 3.42
Horsepower and CC's
Hey guys,
I just bought a 76 Formula with a 72 400c.i. engine. I have a question. I was talking to my friend the other day about heads. I told him the car has Pontiac 6X heads on it. He asked me what the CC's were on the heads, I told him 101 CC's. He started to laugh, he said theres no way i will make good horsepower with 101 CC heads. My question is, is this true? Do i need to find smaller CC heads. He said most high horsepower cars use 70-75 CC heads, is this true? Can I make good horsepower with 101 CC heads?
Thanks,
Robert
I just bought a 76 Formula with a 72 400c.i. engine. I have a question. I was talking to my friend the other day about heads. I told him the car has Pontiac 6X heads on it. He asked me what the CC's were on the heads, I told him 101 CC's. He started to laugh, he said theres no way i will make good horsepower with 101 CC heads. My question is, is this true? Do i need to find smaller CC heads. He said most high horsepower cars use 70-75 CC heads, is this true? Can I make good horsepower with 101 CC heads?
Thanks,
Robert
03-24-2002, 09:23 AM
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03-24-2002, 11:11 AM
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I ran it on the desktop dyno and came up with about 350hp@4500 and 440ft./lbs.@3500.These numbers aren`t
exact because I don`t have flow numbers for those heads but
they should be close.
exact because I don`t have flow numbers for those heads but
they should be close.
03-24-2002, 12:21 PM
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Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
It should give you around 8.5:1 compression i believe, maybe a little lower.
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