OK, first, I need a tach that will fit in my stock tach hole. It needs to work with the rpm output on the stock ecu.
Second, my car is 740, Z32, GT2871R, Enthalpy tuned, SR20DET with all usual mods. The only hokey item I have is an ebay mbc. I think I can remove the mbc since the GT2871R is internally wastegated at 14 psi. The car is running great now except:
My boost hesitates at 7-10 psi for 1-3 seconds. It spools fine then pauses there for 1-3 seconds. Then it spools the rest of the way up to 17 psi just fine. Those 1-3 seconds really slow the car down. 17 psi is crazy. 10 psi is just fun.