Starting Line Ratio

[CDMBill]

I am of the belief that this SLR data and the 1300 reflect years of bias ply tire observation. Drag Radials skew these numbers somewhat from what I have observed. The SLR will need to be lower and the hook factor will run a bit higher.

[JeffMcKC]

Be careful looking at mine,,,,, remember,,, I can throw the sand bags out at anytime..............................

[CDMBill]

That is what we are waiting for. The other issue is so much of what we see with Drag Radials are power adder cars and who the hell knows.

[Firechickenman]

Interesting thread! The SLR chart shows my car should have had a 4.10 gear with the 3.75" stroke it had a couple years ago and a 3.73 with the 4.21" stroke I'm running now. I still have the 4.10 in it and am planning on changing it to 3.73 for Drag Week. Also, on the HF numbers it's interesting that the 1/4 mile numbers come in close to 1320 and the 1/8 mile numbers are close to 660.

[gray86hatch]

My car picked up .2 going from 3.73 to 4.10 this was to the 1/8. carried it out thru the 1/4.

Finish line rpm was right on the edge of too high. I really needed more 1st gear with the 3.73 or 3.90

I also tried 3.90 and it hurt it over the 3.73

[CDMBill]

Where were you on converter? I know I've usually been too tight and more gear has helped if it will hook reliably. Nothing a season of testing wouldn't fix.