Contour Enthusiasts Group Archives Forums Modifications Forced Induction Rev. Po'Jay dyno

That fuel ratio was 11.9:1 and 12.5:1 on two different dynos, both N/A. The measurements weren't taken at that time but later on after more exhaust modifications so the power was expected to go up.
Also, I should clarify that those were the absolute highest I had seen and most of the duty cycles on full throttle runs were in the low 60's. It probably had variation due to temperature and altitude since the power numbers were correted.
Therefore the information I gave you is useless other than to say that at no time did I ever record my 24's to exceed 69% and that was only for an instant at 7000+ rpm's.

Second, I don't know the pressure for the 19's on 240 wHP, but that was DavidZ's old engine.

I made 217 on 19#'rs with 11.5-11.9 A/f ratio and stock fuel pressure.

Bottom line like anything is you need to test this stuff but you can go off of experience from us or you can go off of what you want.