As posted in 4 and 5 you had better CC them, as they are never as low as 96 CCs in chamber volume , and one you get that number if your then getting a valve job done on them then that will add another 1.5 to 2 CCs to the chamber volume .
if you use new valves you might only add 1 CC to the chamber volume if it does not take much meat off to get the seats in fresh shape again.
Most of these heads that I have had on my flow bench produce Intake flow numbers of 200 cfm@.500" @ 28" and out the Exh side 165 cfm@.600" @28".
With a 80% Exh to Intake ratio if you run a single pattern Cam of .525" to .550" lift and have a 9 to1 comp ratio you will have 390 hp in control of your gas peddle !
Another thing to know about all Pontiac iron head is that the factory sets up the Intake valve seat OD some .050" to .070" smaller then the OD of the valve used.
This means that a valve job done with the right angles to bring the OD of the Intake seat out to within .010" of the valve OD with pick up a nice chunk of air flow up to .300" lift.
Keep this in mind!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
Last edited by steve25; 01-20-2020 at 07:41 AM.
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