Reply With QuoteWhat are you expecting to get with the AFPR? Use one FPR if you decide to change it.
Fuel Pressure Regulator
Although my build is NA, I thought some of you FI guys might be the most knowledgable ones to ask about FPRs. My build is a 96 with a 2000 engine, so it is a return-type fuel system. I have been running the 96 fuel rail with the stock FPR and 96 injectors. I'm switching to a M-Tuned fuel rail, stock 2000 injectors (310 cc/min @ 65 psi), a M-Tuned adjustable FPR, and a Walbro HP pump. Basically, my goal is to have the fuel system supply 65-70 psi in order to take advantage of the better spray pattern and delivery capacity of the NB injectors. So here's my question: Somewhere I read that it is preferable to still use the stock FPR along with the adjustable FPR in order to help keep a steady 45psi at idle and lower rpms and set the adjustable FPR to deliver the 65-70 psi at upper rpms. Anybody know if this makes sense? Doesn't the stock NB fuel system maintain 60-65 psi all the time? I'm hoping I don't need the stock FPR at all, because it won't fit on the new fuel rail, anyway. Is there any problem with using the M-tuned FPR in full control of the pressure? TIA.
What's left of a '96 Miata with stock clutch.
My car exceeds my driving ability. That's the only possible explanation.
What are you expecting to get with the AFPR? Use one FPR if you decide to change it.
TXMC: Drinkin, shootin, racin!
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