Quote:
Originally Posted by XutvJet
Keep in mind that turbos are load dependent and 1st and 2nd gears have a lot of torque multiplication from the gearing, thus, those gears do not generate much load on the turbo so they do not generate near as much boost as 3rd and beyond.
1st gear will likely not generate much boost because:
1) The torque multiplication of 1st gear
2) Shortness of 1st gear vs time in gear vs time needed to load the turbo and build boost
For example, my stock M235 6MT with just a catted DP and no tune, generates around 6-7psi in 1st, 7-8 psi in 2nd, 9-11 psi in 3rd and beyond, depending on density altitude conditions.
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+1
first and second gear are too short to reach max boost, thats why datalogs are always done on higher gears