Quote:
Originally Posted by serialk11r
I am pretty sure ECUTEK can control the cam phasing system. It wouldn't hurt driveability if you just installed the new cam so that the intake opening points are the same though, since it wouldn't affect overlap.
I think you need a bigger cam to pull this off since the volumetric efficiency at high rpm is evidently quite good on the stock cam, and the duration is not all that high so it is likely near or at fully retarded position at high rpm for latest possible intake closing. A bigger cam would help bleed off volumetric efficiency. Say if you were planning on running 9 "traditional" psi (increasing mass airflow by 60%), a cam that closes 30 degrees later and opens a few degrees earlier (for pumping loss reduction, would need cam phasing remap) might reduce volumetric efficiency by 25% (probably an exaggeration) at the top end, so your absolute pressure goes from 1.65 bar up to something like 2.4 bar if you can maintain the same mass airflow rate, and now you're sitting in the centrifugal blower's maximum efficiency zone  The intercooler now sheds twice as much heat off, so the final charge temperature is considerably lower.
With more modest power aspirations (such as 1.4x stock mass flow rate) then an Eaton TVS charger would be a bit more appropriate since the boost pressure will be about 0.8 bar, where the TVS is most efficient. |
Rotrex C38-91 Peak Effiecency comes at a pressure ratio of ~1.8. or about 60Krpms (considering that as my torque peak) i'll hit a little over 65K at redline which is in the 73% zone. both The TVS and Rotrex have ~75% peak thermal efficiency in this area it's more of a toss up on having to space the manifold or have a custom one made. If Eaton's Next gen R1100 see's the light of day within the next year or so That will be the route i take (over 70% throughout the whole rev range. (2500-8000)