Quote:
Originally Posted by john970
What do you give up for the increase in horsepower? I'm speculating:
|
Peakier torque curve - Allowing the stock turbos a higher boost limit will cause a bigger torque spike. Thats why you see the dinan numbers have over 400ftlbs but only 380hp... peak torque happens way before peak hp. Torque spikes in low rpms can break things if the internals cant take it. The N54 probably will have no problem with it.
increase in lag - technically there should be NO increase in lag. Its not like you swapped out turbos. It will have the same spool. It will reach 8psi as fast as ****** car. But it will also keep boosting past 8psi. Maybe that is perceived as increased lag?
decrease in reliability (long term) - definite yes
decrease in fuel economy - all depends on how you drive your car. My guess is that if you flash your ECU, you have no intentions of doddling around without boosting
