Fuel Pump Pressure

MattyP

MattyP

Member
Hey Guys, I have an 07 LS and just supercharged, going through tuning but I seem to be losing pressure after WOTs. ZZP Tuner Matt suggested swapping the fuel pump our for either the SS version or AEM. Was looking for a drop in solution but the part numbers are all over the place on the pumps. From what Ive seen, the green sticker on the fuel pump looks like it indicates its an SS model with slightly higher output? Does anyone know of any other drop in replacement pump part number with higher output with confirmed PSI and GPH numbers? Or how hard is it to wire up the AEM pump inside my stock LS housing?
 

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Rauq

Rauq

Goblin Guru
I have a stock LSJ pump if you want it. If you post a picture of the bottom of your bucket I can tell you how well I think it'll fit. Couple bucks plus shipping.
 
MattyP

MattyP

Member
Rauq said:
I have a stock LSJ pump if you want it. If you post a picture of the bottom of your bucket I can tell you how well I think it'll fit. Couple bucks plus shipping.
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Shouldnt the LSJ pump be the same size as the LS? I had ordered one off ebay and off course they packed it like crap and the mount studs came broken on it.
 
MattyP

MattyP

Member
Gtstorey said:
More Information for GM GENUINE MU2221 (rockauto.com) seem to match Buy Genuine GM Auto Parts - Module (Part # 19332412) | GM Parts Store

Have you considered a "boost a pump" voltage booster? Of course, if your pump is original, it's time to replace it anyway.
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Yea its original and not sure if its either failing or just doesnt have the juice to give full pressure at high pulls. And yea I was getting conflicting numbers for the SS or LSJ models. On top of no one can just list the PSI and GPH specs of course.
 
Rauq

Rauq

Goblin Guru
MattyP said:
Shouldnt the LSJ pump be the same size as the LS? I had ordered one off ebay and off course they packed it like crap and the mount studs came broken on it.
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I'd always heard the stock LSJ pump was supposed to be comparable to a Walbro 255. I don't know if it flows more than an LS pump, and this is far from conclusive, but Rockauto lists different AC Delco and Delphi part numbers for LSJ and 2.2 Cobalts. I also had no fuel pressures on low boost with the twincharged setup, figure low to mid 300s whp. I only replaced it in preparation for making more power on E85.
 
Dale E

Dale E

Well-Known Member
Do these stats appear right for specs of the fuel pump? Information off of Partsgeek.com site.

TRQ logo

TRQ Fuel Pump 19098-07441311
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(Read Reviews)
TRQ Fuel Pump
Part Number: 19098-07441311
Brand: TRQ
Notes: Fuel Pump Module Assembly -- Except Partial Zero Emissions Vehicle
Condition: New
Average Flow Rating: 33 gph
Fuel Sending Unit Included: Yes
Fuel Tank Pressure Sensor Included: No
Fuel Type: Gas
Gasket Or Seal Included: Yes
In Tank or External: In Tank
Inlet Type: Strainer
Lock Ring Included: Yes
Maximum Flow Rating: 36.98 gph
Maximum Pressure: 58 PSI
Minimum Flow Rating: 29 gph
Minimum Pressure: 52 PSI
Outlet Quantity: 1
Outlet Type: Quick Connect
Pump Type: Electric
Strainer Included: Yes
Terminal Quantity: 4
Wire Harness Included: No
 
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