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      04-23-2007, 10:32 PM   #41
mkoesel
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Drives: 2015 SO/CSAT F80 M3
Join Date: Jun 2006
Location: Canton, MI

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I think the highest powered naturally aspirated S54s are at around 380 crank horsepower, right? I'm not counting the PTG cars which will probably need a rebuild after 10K miles or less and I believe they are not using a stock shortblock anyway (higher compression). So that's around 15% or so. Figure the same for the S65, and you get about 60hp after all possible bolt ons. Don't expect much more torque though (maybe 20 ft-lb).

If you want more than that, you need to go FI (and thus spend big bucks).
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