I was looking at one of my time slips from my last run at the local track and wondering what my problem is. What I think my problem is, is that my heads don't flow enough to give me the air that the engine needs once it's above 4500 rpms. I'm running 9.8:1 with GT40P's, Explorer intake, 70mm EGR and TB, 1.7's, and a TF stage one cam. Everything is unported. My dyno sheets show my powerband dropping off and 4700 rpms (car runs real rich too, like 11.0:1), which with my 4.10's I'm at that rate or higher most of the time. The car also feels real strong in 1st, 2nd, and about halfway through third. So I did some figuring. My fastest run to date was:
2.15 60'
9.2 1/8
14.20 1/4
99.12 MPH
I was thinking that if the top end air flow really was my problem, then the 1/8 mile would translate into a faster 1/4 mile time. So I multiplied 9.2 X 1.5 and got a 1/4 et of 13.8 which seems to support my theory. Does this sound right? Or am I totally off base?
Thanks,
L.D.
2.15 60'
9.2 1/8
14.20 1/4
99.12 MPH
I was thinking that if the top end air flow really was my problem, then the 1/8 mile would translate into a faster 1/4 mile time. So I multiplied 9.2 X 1.5 and got a 1/4 et of 13.8 which seems to support my theory. Does this sound right? Or am I totally off base?
Thanks,
L.D.