the launch really depends on your setup. with a dual disc clutch you have the option of leaving in third. and as for shifting i normaly shift around 3400-3500 depending on how the trucks running. but htis year i have the new smarty tune so i will shift right before the power falls off.
When I had stock clutch I did 2wd, 3rd gear, 2500rpms and dump the clutch, shift around 2700, now with the DD I do the samething but slip the clutch a little, just got the smarty TNT, I shift around 3200 now.
When I ran my 12.9 I launched in 3rd @ 3300 rpms with no boost and shifted @ 3200 (using beta4.2). On friday when i go again....I will be launching in 3rd @ 4000 rpm with about 10psi of boost and shifting @ 4000 rpm. Hopefully run low 12's on friday.
A forum community dedicated to Dodge Cummins Diesel truck owners and enthusiasts. Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more!