Originally Posted by 654
The dyno shows otherwise no? All I see is power increasing as the revs increase.
I understand the N54 may never be a very
high reving engine but there should be room to increase it past 7200rpm. Even increasing it to 8 or 8.5k, from looking at the dyno, would be a substantial increase in power.
To go on, why install VAC springs that can hit 10k rpm(claimed by vac) when there is zero valve float with the stock springs at this power level and rpm range? "