Menice 331 Posted November 9, 2015 Yeah I think I worked out with my diff I max out at 100mph @5500, which isn't ideal lol I've got 4.56 ratio Sent from my D5833 using Tapatalk Share this post Link to post Share on other sites
wagoon 2,429 Posted November 10, 2015 What was the car doing through the traps when you had 3.45s and what tyre size did you have? Has the 60 foot improved using the 3.9's? Share this post Link to post Share on other sites
Stu5766 394 Posted November 10, 2015 I was doing about 96mph at 4300rpm through the traps on the same tyres. I haven't had it down with the 3.9's to see if anything has improved yet. Share this post Link to post Share on other sites
