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I've been boosted since June of this year on a Harrop 1320 TVS SC with the 85mm pulley (12.5-13 psi) on 91 octane with a DT tune. I'm on E85 with Delicious Tuning's Flex Fuel setup now with the same pulley, and I am loving the car. The difference E85 makes on boost is almost as much as the difference between NA and being boosted; it is that good.
I'm pretty aggressive with my driving too; I don't baby the car at all, yet I am not dropping gears from 5th to 2nd, going to 6k rpms while gunning it, or doing hard launches at every light either. Hopefully the engine holds, but I am not worried at this time.
My only safety nets in place are the following (besides the necessaries, DW700cc injectors and DW300c pump): AMSOIL 5w30 Signature Series oil with their oil filter, Forester XT oil regulator/cooler, dual catch cans, and lastly, gauges to monitor pressure and temperature.
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