What LS1 fuel pump to use
Thread Starter
Teching In
Joined: Jun 2015
Posts: 5
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From: Spokane WA
What LS1 fuel pump to use I need advice on what fuel pump to install.
I have a 1998 LS1 motor installed stock in a 1961 corvette.
I used a complete wire harness designed by a harness company specifically for this. Company now out of business.
Originally a Walbro 5ca 400 / 21119-1/w666e was installed and worked for a few hundred miles then would.die, wait a few minutes it would run a mile and die.
Installed a second one and it seemed to over heat.
Installed a larger 10ga wire and I then installed a 5ca 400hp, and now it ran 40 miles or so and stopped, it has 21lbs of pressure, filter regulator is new.
It seems unlikely that it’s the regulator, my vent cap seems to work, and we did use a larger positive.
Please do you have anything I should try, I need help
thanks
Cal
Thank you Cal Camara
I have a 1998 LS1 motor installed stock in a 1961 corvette.
I used a complete wire harness designed by a harness company specifically for this. Company now out of business.
Originally a Walbro 5ca 400 / 21119-1/w666e was installed and worked for a few hundred miles then would.die, wait a few minutes it would run a mile and die.
Installed a second one and it seemed to over heat.
Installed a larger 10ga wire and I then installed a 5ca 400hp, and now it ran 40 miles or so and stopped, it has 21lbs of pressure, filter regulator is new.
It seems unlikely that it’s the regulator, my vent cap seems to work, and we did use a larger positive.
Please do you have anything I should try, I need help
thanks
Cal
Thank you Cal Camara
TECH Fanatic
Joined: Sep 2008
Posts: 1,653
Likes: 530
Have you checked the fuel pressure at the fuel rail? Just to confirm it's correct and your FFR is working correctly. You can "borrow" one from Oreillys.
Assuming you have an external fuel pump I have used the Bosch 044 external fuel pump on my older LS swaps and never had a failure. Today on my LS swaps I use a Tank's Inc tank with an internal pump which has a Walbro 255. My 98 Wrangler LS6 swap has an internal 255 and has 15 years on it with zero failures.
Make sure you are powering the pump thru a relay and fused correctly.
If you are using a C5 FFR make sure it's a WIX or AC Delco.
Assuming you have an external fuel pump I have used the Bosch 044 external fuel pump on my older LS swaps and never had a failure. Today on my LS swaps I use a Tank's Inc tank with an internal pump which has a Walbro 255. My 98 Wrangler LS6 swap has an internal 255 and has 15 years on it with zero failures.
Make sure you are powering the pump thru a relay and fused correctly.
If you are using a C5 FFR make sure it's a WIX or AC Delco.
Joined: May 2004
Posts: 1,593
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From: Halfway back on the Highway to Hell...again!
First off the C5 filter regulator isn't always good when using a stronger pump. I've proven it a few times by blowing through them with more powerful pumps. So an actual FPR was needed with just a good filter.
As for pumps, I've been using Quantum fuel pumps. Very low priced, lifetime warranty, and have used 7 or 8 in builds on customers cars over the past 2 years and zero failures. Have them in 2 of my own builds as well. Don't let their low prices steer you away. They fuel some pretty wicked motors. 1000+ hp rock bouncers around here.
As for pumps, I've been using Quantum fuel pumps. Very low priced, lifetime warranty, and have used 7 or 8 in builds on customers cars over the past 2 years and zero failures. Have them in 2 of my own builds as well. Don't let their low prices steer you away. They fuel some pretty wicked motors. 1000+ hp rock bouncers around here.
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Joined: Sep 2008
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Question to Sapper. I've used the C5 FFR on a number of LS swaps and zero issues. Not big power swaps.
Now the C5 FFR's have got somewhat expensive. On my next LS swap I may go after market regulator and filter. I like Aeromotive stuff. They seem to have a good rep. I would still like to mount the regulator/filter under the car near the gas tank. Do you do it this way and then adjust the pressure as needed with a gauge at the fuel rail?
I just like to keep the engine bay as clean as possible.
Now the C5 FFR's have got somewhat expensive. On my next LS swap I may go after market regulator and filter. I like Aeromotive stuff. They seem to have a good rep. I would still like to mount the regulator/filter under the car near the gas tank. Do you do it this way and then adjust the pressure as needed with a gauge at the fuel rail?
I just like to keep the engine bay as clean as possible.
Joined: May 2004
Posts: 1,593
Likes: 267
From: Halfway back on the Highway to Hell...again!
On my personal cars I have the FPR in the bay, usually on the fenderwell and have the gauge right at the rail. But that's my preference.
You can mount a gauge on the FPR as well. That way you can see your pressure as you adjust it.
As for brands of FPRs, Hard to beat Aeromotive. I've used pretty much all of them over the years. But stay FAR away from the cheaper Holleys...and IMHO, any FPR under the $250 mark is a failure waiting to happen. Cheap bodies, springs, etc. Spend a little more for a solid billet unit, You'll be happy you did.
Thread Starter
Teching In
Joined: Jun 2015
Posts: 5
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From: Spokane WA
Hard to beat Aeromotive. I've used pretty much all of them over the years. But stay FAR away from the cheaper Holleys...and IMHO, any FPR under the $250 mark is a failure waiting to happen. Cheap bodies, springs, etc. Spend a little more for a solid billet unit, You'll be happy you did.
thanks
Cal
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