erm so why do the people who sell the dyno dynamics recomend 3rd gear, a supra 3ltr tt was on the rr at the same time, he was spinnig in 3rd so did a 4th run but there was not much difference in power on either run. i do believe that the boost i was running should of run a lot more bhp than i made, i have a few things restricting me,330bhp will be next, thing is i know the car inside out and what its made before, its done about 18 RR runs and still in one piece, some people do 3rd gear some do 4th, if the RR is set up right it don\'t matter, what power is your vg running, i had a z31 turbo, i wished that had the power that my tiny ca18et engine had, shall i get my next dyno run written in blood, will that be authentic enough, or will it have to be done o type negative to be true.where ever there a positive on tuning there will always be a jelous downer.