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      12-13-2013, 12:15 PM   #55
BlackLight
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Drives: E92 M3
Join Date: Feb 2010
Location: Surrey, BC

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Quote:
Originally Posted by solstice View Post
You also need to consider the compression ratio. The GT-R run 9:1 and peak boost around 13psi stock. The M4 runs 10.2:1 and 18 psi. Fuel self detonation is a limitation if you want to run on standard 93 octane. The M4 has a lot less room to increase combustion pressure than the GT-R. My guess is that there is little room left on the M4, maybe just enough for a symbolic boost for the comp. pack.
The M3/4 will only run 18 psi at hot high altitude conditions.
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