Just for referance heres a dyno of the first tune,we had uncontrolled boost because of the wastegate position/piping,we have since ground it out nice and smooth whcih has helped alot,though we run 14.5psi now so its not such an issue.

This graph assumes cam timing is correct on both runs though they happened between engine builds so i cannot be sure.I have had to shift the blue line to its correct location as the software did not properly align them on the day,i have not shifted the afr curve.

Blue line is with intake cam retarded troughout the entire rpm range,boost is set at 5.5psi on the wastegate but gradually raises uncontrollably to ~14.5.(notice the problems with surge down low) rpm limited to 6000.

Red line is with the intake cam advanced throughout the entire rpm range,boost has been upped to ~14.5psi

From this its possible to see there will be gains in using the retard up high...but the retard will need to be better compared with the boost setup the same as the red dyno run.




Cheers,
Paul