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iam about to install aftermarket FPR but i have an question.
iam runing stock r20det U12.
so with aftermarket FPR and 11psi of boost i should be at about 48-50 right?
vacuum hose conected.
so is it 48-50 at idle or full troutle?
what should the pressure be at idle and full troutle?
If it's a 1:1 FPR you bought then the full BOOST (not throttle) fuel pressure would be the idle pressure plus the boost pressure.
If idle is 37.5psig and you run 11psig boost then the fuel rail pressure should be 48.5psig.
I am guessing at the idle pressure. I have absolutely no idea what it would be, but probably not far off from 37.5psig.
ok so then full boost should be about 48-49psi, tnen how can i make sure it is at that pressure if i dont the gauge while driving?
i have OBX racing sports R FPR.
If the pump cannot cope with the increased fuel flow then the pressure will fall. You need to run a temporary gauge line so you can see it and make sure that it rises at 1:1 with boost pressure.
After you confirm it once, remove the temp line. OR buy an electric gauge and run a permanent hookup.
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