Fuel pump question
Thread Starter
Teching In
Joined: Nov 2006
Posts: 8
Likes: 0
From: Cape Coral, FL
Fuel pump question Hey guys..
Been lurking a long time around here, and now have a question:
I've got a early 90's TBI truck in the shop with an LS1 (99 F-body), and after searching, couldn't find an answer...
I'm not getting sufficient fuel pressure (about 40 PSI or so), and need to know what pump to use with the OEM fuel sender in order to get the pressure up. From the look of it, a TPI pump was swapped in already, but it's not putting out anything near 58 lbs. The original LS fuel rail is in place with trucks return blocked off if this helps.
Thanks for any responses!
Robert
Been lurking a long time around here, and now have a question:
I've got a early 90's TBI truck in the shop with an LS1 (99 F-body), and after searching, couldn't find an answer...
I'm not getting sufficient fuel pressure (about 40 PSI or so), and need to know what pump to use with the OEM fuel sender in order to get the pressure up. From the look of it, a TPI pump was swapped in already, but it's not putting out anything near 58 lbs. The original LS fuel rail is in place with trucks return blocked off if this helps.
Thanks for any responses!
Robert
that pump is only designed to run about 15psi ,, you could swap to a pump for a tpi engine from a vette or f-body and get enough pressure to run it, you will need a regulator with a return line
How do you know a TPI pump was swapped in already? To look at them there is no real difference between a TBI and TPI pump. But a TPI pump will work if its regulated right. What regulator are you using? I'm running the Corvette FPR/filter with a TPI pump, got 11,000 miles on it with no problems.
Thread Starter
Teching In
Joined: Nov 2006
Posts: 8
Likes: 0
From: Cape Coral, FL
How do you know a TPI pump was swapped in already? To look at them there is no real difference between a TBI and TPI pump. But a TPI pump will work if its regulated right. What regulator are you using? I'm running the Corvette FPR/filter with a TPI pump, got 11,000 miles on it with no problems.
The FPR is the oem F-body regulator on the fuel rail crossover.
The more I think about it, the more likely I am just to use an inline pump and replace the fuel rail (to support future mods for the client).
Thanks for the replies...
that's not a regulator on the cross over, it's a pulse dampner, the regulator is part of the pump assembly
Trending Topics
The F body regulator is in the tank, How are you returning fuel back to the tank on the truck? You should either convert to the system to a corvette fuel regulator combo or use a aeromotive regulator..... If all else fails you can do the walbro 255 pump...
http://aeromotive.carshopinc.com/pro..._id/3263/13109
I have the pumps in stock with -6 fittings for 132.95
http://i118.photobucket.com/albums/o...ogsl392008.jpg
http://aeromotive.carshopinc.com/pro..._id/3263/13109
I have the pumps in stock with -6 fittings for 132.95
http://i118.photobucket.com/albums/o...ogsl392008.jpg
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Verdad Gallardo Thread Starter
Teching In
Joined: Nov 2006
Posts: 8
Likes: 0
From: Cape Coral, FL
Our shop is just now getting into LSx stuff, so excuse my ignorance... my area of expertise is a lot of "old school muscle" stuff and TPI/LTx.
Thread Starter
Teching In
Joined: Nov 2006
Posts: 8
Likes: 0
From: Cape Coral, FL
The F body regulator is in the tank, How are you returning fuel back to the tank on the truck? You should either convert to the system to a corvette fuel regulator combo or use a aeromotive regulator..... If all else fails you can do the walbro 255 pump...
http://aeromotive.carshopinc.com/pro..._id/3263/13109
I have the pumps in stock with -6 fittings for 132.95
http://i118.photobucket.com/albums/o...ogsl392008.jpg
http://aeromotive.carshopinc.com/pro..._id/3263/13109
I have the pumps in stock with -6 fittings for 132.95
http://i118.photobucket.com/albums/o...ogsl392008.jpg
I like to "overbuild" fuel systems a bit (makes room for future mods)
Thanks again for all the help guys!
