jas2234
forum member
So long story short. Car is an 07 gt procharged 10 psi. (492/448). To start with I had stock 3650 with 3.73 gears and ran a pretty consistent 11.8-9 at 121 with 2.1 60". Last year switched over to a magnum XL with 2.66 1st gear. Was advised to switch to 4.10's. With that setup I was running consistent 12.0-1 at 117 with 2.1-2 60". Ended up blowing the rear and based off calculations 4.30's put the XL pretty close to the 3650 with 3.73's final drive ratio.
Well the last 2 or 3 times I have been at the track I have been running consistent 12.3-4 at 113-114. With 1.7-8 60". Obviously 4.30's are the wrong gear. I'm wondering what you guys think would be my next best choice. Go back to 4.10s and work on my 60 or try 3.90 or 3.73. And still work on my 60.
Well the last 2 or 3 times I have been at the track I have been running consistent 12.3-4 at 113-114. With 1.7-8 60". Obviously 4.30's are the wrong gear. I'm wondering what you guys think would be my next best choice. Go back to 4.10s and work on my 60 or try 3.90 or 3.73. And still work on my 60.