Originally Posted by Jim Caughlin (Post 631247)

The shift light is on in my car about as fast as I dump the clutch, I'm in 2nd well before the 60' timer. Looking at the data logger, the engine never drops below 6,000 and is at 8400 within 1 second. That's with a 3.29 1st gear, 6.50 rearend and 28" tall tire. I would guess that your car would be about the same. The ratio is so low that I usually drive around the pits in 2nd gear, I can outwalk the car in 1st!

Originally Posted by tavbfl (Post 631236)

Thank you all for your comments! The chart from Black Magic was exactly what I was looking for. To answer some of your questions, my 60 ft has been between 1.38 and 1.46, 330 ft between 4.10 and 4.15, and my first gear is 2.80. Finding gears for the Doug Nash is a challenge so this can be my callout to any racers that have them in a box on the shelf somewhere. I am looking to change to 5.57 gears as I am crossing at 6300 with the 5.14's and motor makes power to 7000. I am also dialing in a slipper clutch for the first time so it's a matter of optimizing my combo and then focusing on consistency.

Originally Posted by Robin Lawrence (Post 631321)

Lots of good information here. I just finished my stick shift Mustang and have made 2 runs before the track closed. Started out with a 3.32 first and a 5.43 rear gear.

I plan to test a few different first gear as well as rear gear ratio's this year.

Originally Posted by BRETV (Post 631325)

What class Robin?




Bret Velde
2003 ??/SA

Originally Posted by tavbfl (Post 631236)

Thank you all for your comments! The chart from Black Magic was exactly what I was looking for. To answer some of your questions, my 60 ft has been between 1.38 and 1.46, 330 ft between 4.10 and 4.15, and my first gear is 2.80. Finding gears for the Doug Nash is a challenge so this can be my callout to any racers that have them in a box on the shelf somewhere. I am looking to change to 5.57 gears as I am crossing at 6300 with the 5.14's and motor makes power to 7000. I am also dialing in a slipper clutch for the first time so it's a matter of optimizing my combo and then focusing on consistency.