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#1
02-01-2021, 07:54 AM
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As cast Tigers, anyone have numbers from their own testing
I will ask Frank for his results, but has anyone flowed their own set? late gen 1 Tigers, last version before tiger 2
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#2
02-01-2021, 07:18 PM
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Curious as well
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1965 TriPower GTO, 1967 GTO, 1969 GTO, 1969 Judge, 1972 GTO, 1977 Smokey and the Bandit, 1989 TA ProStreet, 1968 Firebird NHRA 10.90 racecar, 1963 Tempest S/Gas |
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#3
02-01-2021, 09:37 PM
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Here is the information posted on the All Pontiac web page. The second set of numbers looks to be for bowl and chamber work only which should be pretty close to as cast.
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Jim 71 Firebird, best 1/8th mile time of 5.02 at 142 at altitude in Vegas |
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#4
02-04-2021, 11:21 AM
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AS cast Tiger 1s were 415-425 cfm with chamber and bowl work.2.250-1,800 valves.Full CNC poert was 450-455 with 2.250 valve 462-465 with 2.300 valve..This head is very sensitive in the valve seat area.If done incorrectly can lose 15-20 cfm.Bill C.
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Checkered Flag Machine & Ceralli Competition Engines Racing engines and induction development http://www.checkeredflagmachine.net/ |
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#5
02-04-2021, 12:58 PM
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thanks Bill. can you post or PM the ''factory valve job angles and margins" I am trying to get a used pair of late gen 1s, back up to original or better if possible. Frank had mentioned the angles were key as did you.
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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