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      12-13-2013, 06:13 PM   #62
solstice
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Drives: 2015 M3 6MT
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Boss330 do you know the boost for these tunes?
Remember the N54 has the same CR as the S55 but run very low boost giving it high tuning potential on stock fuel. You have to check the combination of CR and boost. The S55 is high on both making me doubt that there is much more to be have on stock fuel. You can of course get more hp on the same boost but that means higher rpm and that in turn means large blowers that can generate the large air volume needed to support the pressure at high rpms.

Last edited by solstice; 12-13-2013 at 07:23 PM..