Boost limited based upon ignition timing

[jpierro79]

Before I start the ignition timing I say here only applies to ported head vehicles. So anyone reading this do NOT try to put this much ignition timing into a stock port head you’ll kill the engine.

I’m having some sort of limit from some calculation in the background. This is in Fk8 vehicles.

Once I surpass 26 degrees of timing the software will not allow more than 31 psi of boost. I have raised every table possible and even tried changing reference torque while adding more request in the throttle tables. I’ve tried putting compressor safety to zero, tried compressor efficiency chart, turbine mass flow, valve temp charts, and I think you get the idea. It seems to reduce from some sort of load limit background that I simply can’t see. Less ignition timing results in more boost but ported heads behave so different it doesn’t always help to run more boost. The turbo was a g30-770 and the wastegate was still at 3mm open at 31 psi so there was room in the turbo but the software would not allow it. This stopped the power gain and I was stuck at 680whp.
Unfortunately this problem has remained for a while now.
For reference I just did another car stock head peak timing of 20 degrees and it went above 31 psi easily.

I have not tried ect or iat load correction to fudge it as I didn’t want add any unknown variables. I don’t know how much that will effect air-charge in different weather.

If you have any ideas it would be greatly appreciated.

Ty sincerely
John from Fk8td