Starting line ratio for manual transmission application

tavbfl · 01-06-2021, 11:46 AM

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.

01-06-2021, 11:46 AM	#8
tavbfl Junior Member Join Date: Feb 2016 Location: Florida Posts: 5 Likes: 0 Liked 1 Time in 1 Post	Re: Starting line ratio for manual transmission application 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. __________________ '69 Camaro 468ci Doug Nash 4+1 6.36@107 1/8