08-11-2023, 02:52 PM | #1 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,801
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SMG Big Boy drop in Low Side Pump...
A friend just finished up his build and went with one of these SMG drop in pumps for the low side.
2016 SS A8 Mods: Rods/Pistons 377 Ported Heads Btr stage 2 38% lobe cam LPE HPFP +30 FIC injectors P1x stage 2 w/ 3.9 upper 8" lower. Makes 12 psi on this setup. on E50 this low side pump will not keep up on its own. Tried the SMG settings and everything in-between still no dice. Hooked the JMS up since it was previously installed with a LT4 pump and low side pressure holds great. SOI- 366 EOI- 190 5.3ms injector 2600psi rail .84 lambda 101lb/min dynamic airflow The problem is the FSCM doesn't like this SMG/JMS combo. It literally throws a CEL for insufficient fuel even when cruising part throttle and the JMS isn't active. Unplug JMS no codes. Logs show fuel system is fine but pressure won't hold. Old setup with the LT4 low side pump and JMS no issue. Tried lowering JMS voltage...same issue. Not sure what's up but it looks like this pump has to come out since it won't play nice with the JMS...shame because there is plenty of fuel with this combo but no bueno with the codes. Either way the claims of 900whp using this pump only with no other assist appears to be false...at least targeting .83-.84 on E blend. Might be ok running leaner or race fuel. Just sharing info.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
08-11-2023, 04:10 PM | #2 |
Having FUN in the SUN...
Drives: 2022 M6 ZL1 1LE Join Date: Jan 2022
Location: San Diego CA
Posts: 1,056
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Great info KING... thanks for sharing... another reason why I am waiting for KATECH's drop in solution...
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2022 M6 ZLE: Katech CNC Ported Blower + Ported Heads + 103mm TB + Oil Pump + C5R Chain + Valve Covers + Coil Relocation
TSP VVT and DoD Delete Covers + LME Chain Guide + DSX Billet Lid + ATI Damper + 9.17" Lower + 2.4" Upper + MM Wild CC Coated ARH + AWE Touring + Magnaflow Center X + E85 + MSD Coils + Banks iDash + JMS Booster + Synergy Fender Tank ALL the RED Rear End BMR Goodies + JRE Terminator Cam Package + Remote Tuning and Moral Support from TED @ JRE BMR Motor Mounts + DMS Front HX + FIC 30's + APEX SM.10's + 305/345 R888R's = 770rwhp 785rwtq @E50 13.5psi |
08-12-2023, 12:35 PM | #3 |
Drives: 2020 SS Camaro A10 Join Date: Jan 2019
Location: Columbus, Ohio
Posts: 120
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Mine just failed, I’ve been tuned 4-5 months , lost pressure with boost on way back from Camarofest
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08-14-2023, 09:41 AM | #4 | |
Drives: 2016 Camaro SS Join Date: Oct 2021
Location: Michigan
Posts: 271
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Quote:
Maybe this winter.
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2016 Camaro 2SS 759whp 686wtq tuned by KingLt1
Procharger D1SC - Diamond Pistons/Manley Rods BTR stage 3 cam - Circle D converter American Racing headers - Borla S-type |
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08-14-2023, 02:36 PM | #5 |
Drives: Nickey Super Camaro Join Date: Nov 2008
Location: Loves Park, Illinois
Posts: 1,668
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What code is it triggering?
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08-14-2023, 03:15 PM | #6 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,801
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P2635- Fuel Pump 1 flow insufficient.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
08-14-2023, 06:43 PM | #7 |
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 437
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This is a dumb question because I know you know your stuff without question, but have the parameters in the FSCM been changed to match that of the JMS on HPT? I had to change quite a few values over OE in mine in order for that JMS to function as it's designed to.
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ |
08-14-2023, 08:57 PM | #8 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,801
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The JMS was installed with a LT4 pump prior working flawless for 2-3years. It didn't start throwing codes until this SMG pump was installed.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
08-15-2023, 12:15 AM | #9 |
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 437
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Was the JMS installed and run as is, or were parameters and tables modified in HPT like what is normally done to make the most of it?
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ |
08-15-2023, 07:38 AM | #10 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,801
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It was all adjusted just like my car is or any other car I have worked with that has a JMS and no issues.
Basically if I disconnect the JMS, command 70psi, pressure drops around 5500rpm. High side tanks once pressure gets below 50psi. I lowered commanded pressure in 5 psi increments. Once I got down to 50psi all pressures will hold to 6250rpm then falls off. Now turn the JMS on, pressures hold all the way to 7k rpm. Here is some log screenshots First pic is with JMS off. Second is with it on. Now if this was a setup issue causing the bypass to dump pressure as SMG claims, the JMS shouldn't be helping. It looks like a classic case of the pump itself not being capable enough. Just need to figure out why the JMS triggers a CEL soon as the power connector is plugged in and the car is started. It's looking like a communication issue between ECU and FSCM or the pump itself. Need to do some more testing.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA Last edited by KingLT1; 08-15-2023 at 08:19 AM. Reason: Picture rotation |
08-15-2023, 11:55 AM | #11 | |
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 437
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Quote:
I'm not there so I don't want to assume either though.
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ |
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08-29-2023, 09:23 AM | #12 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,801
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So we ended up removing the SMG pump, reinstalled the LT4 along with adding a DSX Aux pump. The car now has plenty of low side.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
08-29-2023, 09:27 AM | #13 |
Petro-sexual
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That's a bit of a bummer in some ways. At least you guys are back on track.
That Katech set-up has my attention though.
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'20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs |
08-29-2023, 10:50 AM | #14 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,801
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Yeah, he didn't want to risk trying something else that hasn't yet been proven. The Katech is also on my radar for my car if I ever move forward with more mods.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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