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Originally Posted by
ajm8127
You are right. I was off by a factor of 2, possibly due to lack of coffee. It's annoying me that I can't replicate the error I made though.
actually you were right. 3.75ms x 2 stroke/rev = 8000rpms
Originally Posted by
Mike@VAC
We can do cams if you wish. Early adopters pay a lot of $$$ of course. We have cams/springs/retainers/valves etc for just about every BMW engine already in stock.... N54 def is in motion. Demand is very low at this point but I'm sure that will change in a year or 2.
very curious if cams would even benefit the n54... would need to know the stock specs to start doing the math on this. Duration may not help due to VANOS and lobe slope, lift may only negatively effect the valvetrain. Plus the comparison would be very difficult... with any data VANOS logs would need to be included.
Originally Posted by
benzy89
I imagine that if someone raised the N54 redline up to 8k RPMs and paired it with the Vargas Stage 3s/Single Turbo, lifting heads could become an issue. I agree that head studs won't "assist" in raising the redline, but the OEM headstuds will be beyond their capabilities at that point and it'll just be another necessary component when upgrading the motor to those levels.
what
Originally Posted by
BoostAddict
That doesn't make any sense to me. Only way you're going to stretch a head stud is with high cylinder pressures. More rpm drops cylinder pressures due to cam overlap. And they would know immediately if they were having head lift.
+1 overlap, VE, peak pressure further from TDC all contribute to less pressure
[QUOTE=Sticky;457748]Some very good posts but those oem engines that are at over 8000 RPM also are not inline 6's so the fuel requirements change, don't they? "
