Project BMW M3 Part 9: Turbo Update
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At 13 psi we saw a dramatic increase over last month using Sunoco GT Plus Unleaded. With the new exhaust housing from AA, which has an aspect ratio of 14cm2 (compared to 12cm2 for the previous one), the turbo kicks in later but breathes a lot better. In any case, the advantages of Sunoco's race gas are pretty obvious. Notice the smoothness of the curve by comparison to pump gas. After 6000 rpm, the car continued to hold between 40 to 80 more horsepower than with 91 octane! Special thanks to evosport for the exhaust housing swap. View Related Article
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