I plan on replacing the stock FPR. I intend to get a MAF setup at some point so my ? Is can I run a 3 Bar unit on a stock system without larger injectors/turbos/etc..

Thanks

 

Not recommended. Your tune is for a 2.5 bar FPR.

 

What about getting an adjustable? https://www.lindseyracing.com/LR/Porsche/944-4037.html

 

When your chip is configured to run 2.5bar FP, by going to 3bar FPR you get approx +9.5% more fuel. So you'll run rich.

Most chips have the FQS setup to add or remove fuel by x%. If you know what the FQS settings are on your chip, you can take out some fuel to compensate for the added fuel pressure.

The stock chip has FQS #2 & #6 configured to - 3% fuel. (FQS #0 being the first, counter-clockwise rotation).

With a 3bar FPR and - 3% fuel you end up with about +6% more fuel. It's not ideal, but more than likely will be fine till you upgrade your software.

 

It's kind of like putting one 18" wheel on your car and leaving the other three 16". Sure, you "could" but there's nothing good about it. Mileage will do down, drivability will be worse, your bumper will get black soot, you'll make extra smog, and your chakras will be all out of balance. Put it in a drawer and wait till you have a MAF/tune that is mapped to use it.