Originally Posted by Sharif@Forged

Good discussions going on here.

I have been reviewing Cobb's technical bulletins and the AP tuning offers everything except for Cam phasing/lift control. The VVEL system is very sophisticated, and it's going to be a while before tuners have full understsanding and control over this. It's important to make the distinction between Camshaft Phasing (also called camshaft timing control), and Camshaft lift control. As a side note, the vast majority of power gains come from fuel and IGNITION timing enhancements, rather than cam phasing and lift contorl. We tune cam phasing on the VQ35's with haltech, and it's easy to see that the OEM mapping got this one pretty right. On the intake side, at WOT, we run from full advance, to full retard by redline. There isn't much more room for refinement there.

We are ProTuners for both Cobb and UpRev, and have quite a bit of experience with both of them, so if anyone has any questions, feel free to ask. I think we are one of the few Nissan based shops that has hands on experience tuning the Cobb AP, which we've done with the GT-R, and also the EvoX.