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      01-05-2013, 02:51 AM   #67
beta
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Drives: 2006 M Roadster
Join Date: Mar 2011
Location: CA

iTrader: (2)

E46 M3 getting 327 rwhp, 259 rwtq with an evolve airbox, euro headers, euro cats and alpha-n software (can't link to the thread so you'll have to google "Evolve gains 46.8 wheel horsepower naturally aspirated on an E46 M3 S54").

Let's put these numbers into perspective: this NA kit is putting down the same torque of an ESS Stage 1 supercharger.

Math below:

Stock S54 has a claimed 269 torque at the crank. Stock dyno for this car has 234 rwtq. Using these numbers we get 87% drive train loss (pretty close to the 15% rule of thumb).

ESS VT1-445 has a claimed 305 torque at the crank. 87% of 305 is 265 rwtq. ESSs own dyno shows our math is roughly correct with between 260 and 270 rwtq.

So if we do the math the other way around (234 to 279 is 119.23%), we get that the 259 rwtq of the evolve airbox is 308 torque crank.

Edit: I modified the dyno below so it would take up less room horizontally.
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Last edited by beta; 01-05-2013 at 03:44 AM..
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