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12-10-2019, 12:42 PM
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#1 |
 
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Wet Kit
For you guys spraying on a wet kit, what fuel pressure should I be looking to maintain? Currently while diing some street tuning, it has dipped to around 52psi a couple times. Is this too low? I'm only looking to spray a 50 shot at the moment, and will never go over 100 shot if I ever go up.
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12-12-2019, 08:28 AM
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#2 |
      Drives: 2011 Camaro SS 6sp Join Date: Nov 2016
Location: Drivers Seat
Posts: 1,904
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I dont run nitrous, but if your actual fuel pressure is falling below your commanded fuel pressure, it means your pump cant keep up. This is especially bad when your fuel injectors are not large enough to compensate for the low pressure and hit %110+ duty cycle.
Which fuel pump are you running? What is your commanded fuel pressure? Have you tuned the FPCM yet?
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2011 Camaro SS---SOLD
TMS Dart 427 FED M311s, ESS Tuning G4 Blower, DSX Triple FP Assembly, DSX FF, FIC1300, Mcleod RXT 1200HD, Edlebrock Pro Flo XT 1158whp 1017wtq. 2010 CTS-V A6 - "Stock" SOLD 630whp 658wtq 2024 F-150 RCSB 5.0 4x4 waiting for tunes... |
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12-12-2019, 05:55 PM
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#3 |
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Its a stock SS fuel pump and injectors. I found a post that stated it is commanded to drop to 50psi at upper RPM's. Im not sure if my tuner has tunes the FPCM or not. I will inquire with him. He uses HPT, is there anything specific I should ask him on it?
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12-13-2019, 05:20 AM
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#4 | |
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Drives: 2011 Camaro SS 6sp Join Date: Nov 2016
Location: Drivers Seat
Posts: 1,904
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Quote:
To edit the FPCM it requires 1 additional HPT credit. I would get a laptop on the car while you do a nitrous hit. Log Desired Fuel pressure and actual fuel pressure. If they are the same, then you know you're fuel pump is ok for your current mods. If its starting to drop, he can either unlock the FPCM and try to bump the fuel pressure, or you can buy a ZL1 pump. Or both. Also wouldn't hurt to log injector duty cycle, to see how much room you have.
__________________
2011 Camaro SS---SOLD
TMS Dart 427 FED M311s, ESS Tuning G4 Blower, DSX Triple FP Assembly, DSX FF, FIC1300, Mcleod RXT 1200HD, Edlebrock Pro Flo XT 1158whp 1017wtq. 2010 CTS-V A6 - "Stock" SOLD 630whp 658wtq 2024 F-150 RCSB 5.0 4x4 waiting for tunes... |
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12-13-2019, 09:52 AM
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#5 |
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Sounds good. Thanks for your replies. I will get back with my tuner. He's been tuning for many years, and worked at Detroit Speed before starting his own shop, but he hasn't tuned any 5th gens on spray, so we just weren't sure when we seen the fuel pressure dip that low.
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