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      06-11-2010, 06:40 AM   #2
Tuner.Series M3
New Member
South Africa

Drives: E90 M3 white
Join Date: Jun 2010
Location: Cape Town

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Thank you PencilGeek. I do believe that having a factory bottom end is the most reliable source for making power. I don't think I'll ever stroked a motor, even though the M3 GTS is factory stroked to 4.4

TrackRat well said. I plan on going custom camshaft with most effective duration and lift that the S65 engine can handle and ect...mods.

I can not equate BMW with Honda.
That being said , Honda k20a engine produces approximately 120-140 whp per liter with porting, cams , exhaust, intake on stock internals ( I understand that this is a fwd engine). The rwd f22c engine from the infamous s2000 has similar results with cams , exhaust ,intake and porting.


S2000 whp without porting, just cams intake and exhaust:

Here are some links to how much flow they could get out of an f22c head

And the flywheel dyno results with similar mods:

Head flow aids supporting might seem like 2-5whp with no mods. As soon as you add bolt on you find you have a beast in you hands.

K20a from DC5:

I see similar results for the S65 engine...we just have to find the correct "code" to crack true potential of this beast..

Thank you for the replies.

Last edited by Tuner.Series M3; 06-11-2010 at 06:46 AM.