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#1
06-08-2011, 02:00 PM
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Head swap
I currently have a 71 Pontiac motor out of a Grand Prix with 96cc heads, I have a 69 GTO motor with 72cc heads. I was wondering if I put the 72cc heads on the motor currently in the car will this make a big difference or is it not worth it. PS they are not ram air heads. Thanks in advance
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 "One dog is goin one way , one dog is goin the other, the guy is looking like what do you want from me"
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#2
06-08-2011, 04:26 PM
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Depending on the rest of the package(cam, intake, exhaust)you may see a little gain assuming your 69 heads have 2.11/1.77 valves. May end up pinging as well. I know my 400's with 72cc heads will rattle even at my 4500 foot elevation. Going to be worse at sea level.
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Jack Ferris RestoRacing LLC www.restoracing.com Sandy, UT --------------------------------------------------- |
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#3
06-08-2011, 06:48 PM
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Swapping stock heads for stock heads you'll see a slight increase in HP due to the bump in compression. You'll also see a need for higher octane fuel, likely higher than you can get at the local station. If you think gas is expensive, start mixing in $8+ race gas and it gets real old fast. I don't think swap is a worthwhile proposition.
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1966 GTO 1969 Lemans Convertible- F.A.S.T. legal family cruiser. 12.59 on G70-14 Polyglas tires. 1.78 60' 1969 Bonneville Safari- cross country family cruiser. . 1979 Trans Am 400, 4-speed, 4 wheel disc. View from the drivers seat racing down Atco Raceway- http://www.youtube.com/watch?v=GhYDMdOEC7A Ride along in the other lane-http://www.youtube.com/watch?v=mIzgpLtF_uw |
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