Brian, that is EXACTLY why KRE wanted to do the test. They already have numbers on a couple of combo's....but....the ONLY way to really know how these heads are going to work is to add a set on an existing combination and change NOTHING else. My combo was chosen because I'm close by and have very good numbers on the car. A couple of weeks ago I made 6 back to back runs without shutting off the engine and all runs were between 7.71 and 7.78 right at 90mph. The increased power should be pretty easy to pick up by the timeslips.
To be perfectly honest I was a bit surprised by the power my engine produced with the iron heads and iron intake/q-jet. My intake is modified at the flange to accept both square and spread bore carbs, but very little material removed in the runners. Even so KRE was convinced it would not make power past about 5100rpm. Remarkably it pulled right past 5500rpm with their heads (495hp @ 5600rpm) and made peak power at 5300rpm with the iron heads...and....only fell off a few hp at 5500rpm.
We're headed to the GTOAA even this weekend, will get to the track ASAP to back up the numbers......Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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