05-03-2020, 08:47 PM | #1 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
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Fuel pressure drop under boost..
Is fuel pressure drop under boost normal? I video recorded a couple pulls the other night and as my boost got above 6lbs fuel pressure started dropping but wide band was normal.
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-03-2020, 09:32 PM | #2 |
Drives: 2011 Camaro SS 6sp Join Date: Nov 2016
Location: Drivers Seat
Posts: 1,904
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No. Thats a sign that you need more fuel pump. Afr didnt change because your inj duty cycle went through the roof to compensate. Running your injectors over 100% wont last long. Recommended you dont go past 80%.
What is your fuel system?
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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... |
05-03-2020, 09:34 PM | #3 |
Drives: 2011 Camaro SS 6sp Join Date: Nov 2016
Location: Drivers Seat
Posts: 1,904
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The Fuel pump control module in the SS has fuel pressure set to 58, until your rpms rise, then its programmed to drop to 48. You can change the tune to demand 58 all the way, but most likely you’ll need more pump.
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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... |
05-03-2020, 09:37 PM | #4 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
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ZL1 pump
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-03-2020, 09:39 PM | #5 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
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When I was tuned, wot and full boost injectors were only 40% duty cycle. But I do not know what the fuel pressure was.
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-03-2020, 10:40 PM | #6 |
Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019
Location: Connecticut
Posts: 1,925
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Zl1 pump with a programmed fpcm should be good to a little over 600whp. Has your fpcm been programmed or did you buy a pre programmed one like jannetty sells?
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Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane
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05-03-2020, 10:45 PM | #7 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
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My car come factory with a ZL1 fuel pump and whatever the tuner has done. And I was told 700whp was max on a ZL1 fuel pump on 93.
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-04-2020, 05:58 AM | #8 |
Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019
Location: Connecticut
Posts: 1,925
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Not unless he at least installed a BAP. What's the fuel pressure dropping to? You don't want to see any fuel pressure drop.
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Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane
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05-04-2020, 07:07 AM | #9 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
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58 psi then drops to 50 psi
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-04-2020, 08:02 AM | #10 |
Drives: 2011 Camaro SS 6sp Join Date: Nov 2016
Location: Drivers Seat
Posts: 1,904
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Sounds like the FPCM was not tuned.
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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... |
05-04-2020, 08:15 AM | #11 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
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Ok, how do I go about doing that?
Getting the fpcm tuned. Sent from my SM-G960U using Tapatalk
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-04-2020, 08:22 AM | #12 |
Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013
Location: Galion, Oh
Posts: 531
|
Greenhornet2 thanks, Jannetty sells a pretuned one for $199 probably best and fastest option.
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2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles.
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05-04-2020, 09:35 AM | #13 |
Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019
Location: Connecticut
Posts: 1,925
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Yes, that's what i used. You may want a new tuner they don't seem to know what they are doing too well.
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Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane
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05-04-2020, 09:40 AM | #14 |
Drives: 2014 Camaro SS 1Le Join Date: Feb 2016
Location: IL
Posts: 1,606
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if you get an auxiliary pump, will your FCPM for the ZL1 pump still need to be adjusted?
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2014 SS 1LE Money Pit/ Forged 402
CAM 22X/24X, .619/.617, 113 LSA/ LS9 Heads FIC 1200cc/DSX Aux Pump//McLeod RXT Clutch 730whp: 630Trq |
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