The title gives you the set-up I have been running with. The AEM FPR and SAFC-2 are going in this upcoming weekend. My question is, with the AEM FPR in place to lower base fuel pressure, and the SAFC to alter injector pulse widths, should I be able to tune this car for optimal Air/Fuel ratios? Or will I be running lean at the high end without something to bump fuel pressure under boost? A Z32 MAF will be going in as well, since my A32 MAF will likely be maxed out on the airflow. I don't think I've gotten a deifinitive answer to this one, but I would rather have a good idea before I get on the dyno then after (when my car is either dead or still in need of a tune after MORE ewuipment is installed).

In short, for this setup (Z32MAFs/A32 ECU/370cc injectors/Walbro lph hp/AEM FPR/SAFC-2) Will an additional bump in fuel pressure be required under boost/at WOT? Will I need to add an FMU on top of everything else?

 

Youll need to bump fuel pressure with an FMU. I was running the same setup, minus the SAFC2, and I was leaning out under any type of boost pressure. Im not too familiar with the safc2 but i dont think you can do much for adding fuel with it. I know guys with 555's and your setup and use the SAFC to take fuel away via the airflow. Again Im not to familiar.

-matt

 

I had 410's and I had to bump the fp at a 1:3 rising rate.