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Old 12-02-2012, 05:41 AM   #29
serialk11r
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Quote:
Originally Posted by FreshFRS View Post
Good points, i was basing off the engine being totally stock though, IF ECUTEK can figure out how to tune AVCS this could be really feasible with stock cams.

supercharger is my plan as i like throttle response over bigger dyno numbers. A rotrex C38-91 mounted between the A/C and alternator (flip HKS's design) and the stock intake manifold (with A/W integrated somehow) raised up (with custom pieces moulded to lengthen from the top of the inject placement to the bend to keep factory contours) as high as i need to run an intake duct under it routed the same way as Innovates supercharger (with a wider, shorter section under the actual manifold for consistent airflow. it would be only a custom silicon elbow from supercharger to throttle body. tuned at say 9psi (spinning about 65kRPM at redline) would be perfect IMHO :happy0180:
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.
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