8 3/4 gears
That has an awful lot to do with timing, and Transfer slot exposure. I ran the 292/292/108 (
[email protected]), and learned real quick that I could not run the same low-rpm timing as guys with automatics do. With the right T-Slot, that 292 would pull itself in 2.66 x 3.55 ,down to 550 in gear at 5* advance. No fuss. And that at over 185psi ccP.
But everybody wants to run 18 or more degrees, so what can you do......... I ran 14* at Idle, and whittled it down to 5 on the fly with a dash-mounted, dial-back, Jacob's Ignition Box. At the other end I ran ~32/34 PowerTiming, plus 22 in the Vcan plus up to 6 more on the Dial-back for cruise timing of up to 60/62* at 3200/3400rpm. At 2800 it was 28+22+ up to 6=56*
I run that same ignition curve now, with a 230/237/110 Hughes HFT and still/again with 3.55s. But now with a 3.09 Commando and a GVod, so 65=2240, lol.... in my 367 lol; that has gone 93 in the Eighth on it's one and only successful run (1 of 4, 3were fails), using the GV as a splitter, for 4 gears to
93= ~6150 rpm. The starter gear is 3.09 x 3.55=10.97, (~s/a 2.66 x 4.10s=10.91)