Re: Cobb v.103 + Stage 2 = Fuel Pump Needed - Badly.
[quote author=evo2ms3 link=topic=133955.msg2879188#msg2879188 date=1232514781]
[quote author=Sinitron link=topic=133955.msg2878879#msg2878879 date=1232508393]
[quote author=evo2ms3 link=topic=133955.msg2878780#msg2878780 date=1232505884]
What are your mods?
cobb sf, rpmc inlet, ETS tmic, cp-e dp, stock catback, stock BPV.
Can't get much closer than that for your map. I remember hearing way back when how v103's were gonna require a fuel pump. Looks to be the case for stage 2+ users at the very least. So far, I'm good on the stage 1+ final. Wish the built pumps weren't so damn expensive though, or I'd get one anyways.
Yeah I never had a problem at stage 1, or even 2 up through versions 1/1.01/1.02... it held fine across the board with level fuel pressure.
Now it's falling off hard, and I'm watching the A/F wobble a bit when the pressure drops. Just waiting for my pump so I can re-log and make sure that's the solution.
I think it may also be the source of my random low-knock issue once I get into boost with partial throttle over 3k rpm.
As dread mentioned, it is getting up there in boost a little, but the PDF usually says +/- 1-1.5psi.... so... within range sort of. I usually hit 18-18.5.
If I switch to an aftermarket BPV, it used to reach 20(forge) to 21 or 22psi (hks) peak.