Grossi and the Big Block

[Lynn A McCarty]

FJ,

Let's face it, most all GTAA combos are "favorable" combos or they wouldnt be running them ours included. The square port big block combos are tough at 3610lbs.

I dont think the head flowing rule would work. The same thing would happen there as happened with the CC numbers. That is the biggest farce in SS that no one talks about ('cept yours truly). People would show up with bogus heads. How you gonna calibrate the flow bench? Stacy recently got a set of heads flowed on 4 flow benches. He got 4 way different numbers.

Also, head flow is only 1/2 the battle for making power. Especially in a larger cubic inch engine. In fact, most head porters will tell you that they go for port shape first and flow second. We recently did dyno testing on the cross sectional area of the intake port at the push rod. We lost 60HP even though the flow was about the same.

We bonehead technical guys even have an equation for it. (It serves my anal retentive tendencies very well ) Just for those interested in such things. To me it is fun to find good operative tools that we can find good correlations in science. None of them are perfect and there are always exceptions. (disclaimer Travis style)

Choke:

CSA = bore * bore * stroke * RPM *.00353/614

CSA = minimum cross section of your intake port not the average
614 is feet per second (usually actually twice that of a pitot tube measurement) This number can move around a bit by maximizing factors that contribute to intake Choke