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      07-31-2012, 12:30 PM   #19
pbonsalb
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Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

Posts: 1,542
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These engines run very high compression and seem to be octane sensitive. The meth gives you the equivalent of higher octane than any normal pump gas. This allows higher ignition timing than you can run on pump gas, and more timing makes more power. I bought the Vishnu procede piggyback with meth injection for this reason. I think it will outperform any tune running 91 or 93 octane pump gas.
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