There is no reversion on these 62's. THey flow 280cfm at .600 and .700 with out any tumble. I am afraid when I install the Wenzlers, it will slow down or run the same!! Something is not right with the car now and I need to find the problem before I change something so drastic. The Wenzlers I have must have been a bad experiment and should have been melted down for scrap. Not saying I can't fix them, but I should not have to. I will post the numbers Wenzler supplied with the heads to the previous owner and the numbers supplied by G&G.
Wenzler G&G
200 155 150
300 218 170
400 263 207
500 282 239
600 296 266
700 302 280
These are at 28" on the intake. He said the short turn is totaly screwed. I have epoxied one short turn and should get flow numbers later today or tomorrow. Regardless of which heads end up on the motor, I am going to have the head flowed with the Victor installed and will go back to a chassis dyno with wide band o2 to nail down the tune up before hitting the track.
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1971 Base Firebird..505ci IA 2A Round port E-heads by Butler 348 cfm.. Comp street SR 266/ [email protected] Victor intake/Quick Fuel Q950. 1 7/8" Dougs headers..3" mandrel bent exhaust with Hooker Max Flow mufflers, T-350 well built with 10" 4000 stall nitrous Continental converter..3.73 posi . Caltracs and 10" slicks. Belt driven water pump, alternator, Pwr steering and brakes,Flex fan. 11:1compression, straight 93 octane pump fuel. 10.35 @ 129.88 with 1.45 60ft N/A at 3700lbs race weight.
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