If he's would like to, he could either turn up or down the boost on the turbo. Also, I'd try and get the final gear ratio where it sets at around the most torque (probably low, under 2000 rpm) at 70, but this escalates to the problem of gearing. you'd probably have the best bet of gearing it to a 6 speed, the first 5 where you get the most torque in fifth gear at around 60, and 6th most torque at 70. If you wanna know about boost, SCC has lots of info on tuning your turbo's for the correct PSI.
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