Stock fuel rail and fuel line limits - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Crash76 · 07-31-2020, 07:55 AM

I run whatever comes out of the pumps, about 75-80% Ethanol... 23% OD , ID1050x with stock pump, DSX Aux pump, tuned by DSX with fpcm changes also

Cammed and LTs

No fueling issues

gsxrturbo · 08-01-2020, 11:45 AM

mrvenicess,MY guess if your rails were not at its limits,it would have been showing up when tuned.my guess would be an injector.im at 845 no problems....just my guess

madmikeismad · 08-01-2020, 01:29 PM

Yeah I think I have it narrowed down to combination of fscm and aux pump/stock pump not working together right. Probably my fault.

2NASSTY · 08-03-2020, 06:27 AM

You’re now on the right track on your FP issue with the Aux pump. If it’s using a Hobbs switch to activate it’s not tied into the FSCM. It’s not Dave Steck’s current setup which scales Fuel Pressure off the factory MAP sensor after he tunes the FSCM module.

You should be seeing 70-80 psi at WOT throughout the power curve. There are now (2) knockoff aux kits using low side fuel pressure with Hobbs switch activation.

mrvenicess · 08-03-2020, 06:45 AM

Quote:

Originally Posted by gsxrturbo

mrvenicess,MY guess if your rails were not at its limits,it would have been showing up when tuned.my guess would be an injector.im at 845 no problems....just my guess

No it was the fuel rail that bottlenecked the fuel flow to the no7, I think, cylinder. Injectors, ID1700s, were flow tested and were working fine. Ive since heard that around 850 is around the limit for the stock rails.

08-01-2020, 01:29 PM	#17
madmikeismad Drives: 2012 ZL1 Join Date: Mar 2020 Location: Oklahoma City Posts: 66	Yeah I think I have it narrowed down to combination of fscm and aux pump/stock pump not working together right. Probably my fault. __________________ '12 ZL1 - RPM 5", TSP 2" headers, Speed Engineering 3" header back, Dayco 8.66 lower/LPE 2.38 upper with solid isolator and 10 bolt hub, hand ported blower and snout and went way too far, ID1050x's, DSX aux harness with a summit 400lph pump on E, NGK TR8's with Taylor wires, 160* tstat, NW 102, UPR catch cans, HP Tuners, Stock unopened long block

08-03-2020, 06:27 AM	#18
2NASSTY Drives: 2014 M6 ZL1 Join Date: Jan 2012 Location: Tarpon Springs, Fl Posts: 772	You’re now on the right track on your FP issue with the Aux pump. If it’s using a Hobbs switch to activate it’s not tied into the FSCM. It’s not Dave Steck’s current setup which scales Fuel Pressure off the factory MAP sensor after he tunes the FSCM module. You should be seeing 70-80 psi at WOT throughout the power curve. There are now (2) knockoff aux kits using low side fuel pressure with Hobbs switch activation. __________________ 15' Ashen Gray Metallic Z/28 14' Crystal Red Tintcoat ZL1 6M, 9.62 at 150.75 MPH 12' Opulent Blue Metallic CTS-V Sedan, 10.690 at 129.60 MPH - SOLD 06' LeMans Blue Metallic Z06, 11.726 at 127.80 MPH Motor - SOLD. 96' Impala SS LTx, 11.397 at 118.10 MPH Motor, 1st stage 10.526 at 127.46 MPH

07-31-2020, 07:55 AM	#15
Crash76 Team 913 Drives: '14 ZL1, '15 Jeep GC, ‘22 Ram 2500 Join Date: Apr 2015 Location: USA, Central CA Posts: 1,119	I run whatever comes out of the pumps, about 75-80% Ethanol... 23% OD , ID1050x with stock pump, DSX Aux pump, tuned by DSX with fpcm changes also Cammed and LTs No fueling issues

08-01-2020, 11:45 AM	#16
gsxrturbo Drives: 2010 ss Join Date: Oct 2015 Location: windom mn Posts: 337	mrvenicess,MY guess if your rails were not at its limits,it would have been showing up when tuned.my guess would be an injector.im at 845 no problems....just my guess