[casrak7]

Originally Posted by Rory McNeil

Sounds like your convertor is pretty loose, slippage wise. My 85 Mustang was 3100 pounds with driver, also had 4.88 gears, although I ran 9 x29 and 9x29 1/2" slicks, and at 130 MPH, I was only revving 7000-7100 across the finish line. My car was a stickshift (Jerico 4 speed), so no convertor slippage, but 8000 RPM at 130 with a 28" tall tire seems awfully high. I previously ran the car in Stock, so it had factory type suspension, with Maximum Motorsport non adjustable LCAs, and adjustable uppers, with Strange single adjustable shocks, and typically ran mid 1.3 60 foots, with a best of 10.15 at 130 MPH with a flat tappet, pump gas 331 cube SB Ford engine. Seems that you have a pretty large carb, my engine was 24 cubes smaller, and a Holley 650 was plenty.

Actually, the math shows roughly 6 percent slip

That was a great running car! What was the whole engine combination?