Z32 AFM and Big cams - how will it run?

[ookami]

Currently I've got a HKS Fcon V pro running a map sensor with tomei 270 degree cams and a hks gt2535 on an RB25. I want to go back to a Power FC so i can tune it locally, and I'm just wondering if the afm will cause any dramas with these size cams.

cheers.

[rob82]

The biggest problem with large camshaft duration is at low revs the quaility of the vacumm signal is very inconsistent. By increasing the diameter of your MAF your only making the problem worse as you are reducing the inlet velocity by a factor (Diameter orignal/Diameter uprated)^2.

That said if your going back to PFC you shouldn't have to much trouble you will probably just lose some milage as you will have to tune it quite rich at low rpm in order to it stop surging. Whats the actual duration at 50 thou?

[R31Nismoid]

No drama's at all.

guys are running some bigguns no problems at all if your tuner knows whats going on

[Cubes]

The Z32 and RB AFM's have very similiar airflow curves at low voltage/airflows.

The resolution at low airflow is basically the same.

[ookami]

cheers thanks for that.