Quote:
Originally Posted by mike-y
because all of those things (minus compression) add flow through the motor. Adding more air will give you the ability to make more power. The 3 stage manifold adds more flow.
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you forgot to disclose, that it adds better flow for the "lower rpms"... and the lower rpms does not give you the max power output...
Quote:
Originally Posted by mike-y
Valvetronic adds both lift AND duration.
The 330i runs more max lift+duration than the 325i, so changing the valvetronic program is like changing the camshaft on a regular car.
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now we are getting somewhere... and again, this will take a competent tuner (not a manifold) to extract this feature out of the DME and thus, the most power output of this motor.