Quote:
Originally Posted by 25stevem
You can’t just look at the exh to intake ratio, the level of cylinder pressure the motor will make and how fast from BDC the piston gets to its fastest acceleration point are all factors.
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Yes and no. Like Steve C said it is the whole exhaust and intake packages. But it all STARTS at the head. If you can get way more out the exhaust port to tailpipes why do you need more exhaust duration. Too much overlap and big exhaust can kill velocity and scavenging out. You have an intake deficiency! So working on getting more intake flow in vs exhaust out is what you need. 4 different cams, 2 sets of headers and a couple of different exhaust systems om my NMCA RAIV I played that game.
Talks with John Schloe n his RAIV Stocker and John Angeles on his SS RAIV also.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
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