Please confirm: LT1 pump OK to use with stock 5.3
06-17-2018, 03:43 PM
#1
Please confirm: LT1 pump OK to use with stock 5.3 Hello,
I've searched for this question and the answers I have found are "pretty sure" that it will work. I definitely don't want to have to pull the tank and buy a new pump. Can someone tell me if the LT1 fuel pump (48psi) will definitely work for a stock 2004 5.3 (58psi). I'm running the corvette regulator (setup for 58psi), I'm interested to know if anyone has done this with success or a shop has seen this work for certain.
Thanks,
Brandon
I've searched for this question and the answers I have found are "pretty sure" that it will work. I definitely don't want to have to pull the tank and buy a new pump. Can someone tell me if the LT1 fuel pump (48psi) will definitely work for a stock 2004 5.3 (58psi). I'm running the corvette regulator (setup for 58psi), I'm interested to know if anyone has done this with success or a shop has seen this work for certain.
Thanks,
Brandon
06-17-2018, 05:01 PM
#2
those pumps are rated to 100psi+ though as pressure rises flow output will fall
i used the stock pump for the swap in my 98 c1500 which is similar an it has been fine
seems like some of the aftermarket vette regulators have issues so gm or acdelco has been recommended though more expensive
i used the stock pump for the swap in my 98 c1500 which is similar an it has been fine
seems like some of the aftermarket vette regulators have issues so gm or acdelco has been recommended though more expensive
06-17-2018, 08:48 PM
#3
Thanks for the input guys. I was planning to order the vette regulator and fittings in a kit from Speedway Performance. It does not say the manufacturer of the regulator/filter. Has anyone had good or bad experiences with their products, particularly fittings and filters/regulators?
Thanks,
Brandon
Thanks,
Brandon
06-18-2018, 08:08 AM
#4
I bought the speedway corvette regulator kit back in 2012 because it came with the fittings I needed. I have no idea what brand they are, but mine did fail after about 2 years. I ended up replacing it with the wix brand from napa and have not had any issues.
06-18-2018, 10:05 AM
#5
I am not an expert but I do not think a "corvette regulator" is going to boost psi to 58. The f body LS1 pump has a set screw that I have heard you can adjust..not sure if the LT1 has one as well. If it does, you need to bump up the LT1 pump and when the fuel gets to the corvette regulator, it adjusts fuel pressure and sends extra back to the tank (LT1 bucket).
have you bought the stuff yet? Id consider just buying/using the 5.3 bucket from the donor vehicle. You wont need the corvette regulator but you will need to figure a way out to mount the bucket in the newer tank.
have you bought the stuff yet? Id consider just buying/using the 5.3 bucket from the donor vehicle. You wont need the corvette regulator but you will need to figure a way out to mount the bucket in the newer tank.
06-18-2018, 10:27 AM
#6
Originally Posted by reedld
I am not an expert but I do not think a "corvette regulator" is going to boost psi to 58. The f body LS1 pump has a set screw that I have heard you can adjust..not sure if the LT1 has one as well. If it does, you need to bump up the LT1 pump and when the fuel gets to the corvette regulator, it adjusts fuel pressure and sends extra back to the tank (LT1 bucket).
have you bought the stuff yet? Id consider just buying/using the 5.3 bucket from the donor vehicle. You wont need the corvette regulator but you will need to figure a way out to mount the bucket in the newer tank.
have you bought the stuff yet? Id consider just buying/using the 5.3 bucket from the donor vehicle. You wont need the corvette regulator but you will need to figure a way out to mount the bucket in the newer tank.
06-18-2018, 01:04 PM
#9
i like the russell rail/filter fittings in that they use a threaded piece to keep the fuel line secured as opposed to a plastic clip in piece
this looks like a decent kit though not sure who makes the tank's inc branded filter
summit racing 03-0262
https://www.summitracing.com/parts/c...tcombocontents
i've read of wix filters failing as well so may be hit or miss
this looks like a decent kit though not sure who makes the tank's inc branded filter
summit racing 03-0262
https://www.summitracing.com/parts/c...tcombocontents
i've read of wix filters failing as well so may be hit or miss
06-18-2018, 01:12 PM
#10
not true or not necessary...
I am using just the ls1 fbody pump/bucket in a 75-81 fbody tank. The reg is built in the pump/bucket. The only thing I have between my tank and fuel rail is a fuel filter. EZPZ.
https://ls1tech.com/forums/fueling-i...el-bucket.html
06-18-2018, 01:37 PM
#11
not true or not necessary...
I am using just the ls1 fbody pump/bucket in a 75-81 fbody tank. The reg is built in the pump/bucket. The only thing I have between my tank and fuel rail is a fuel filter. EZPZ.
https://ls1tech.com/forums/fueling-i...el-bucket.html
I am using just the ls1 fbody pump/bucket in a 75-81 fbody tank. The reg is built in the pump/bucket. The only thing I have between my tank and fuel rail is a fuel filter. EZPZ.
https://ls1tech.com/forums/fueling-i...el-bucket.html
i always though that was a regulator but it's just a damper?
so do you just have to run a tee in the line to go back to the tank fuel module?
lt1
http://shbox.com/1/fp_reg.jpg
06-18-2018, 02:05 PM
#12
No need to say sorry, it is all good!
Yes, the fuel out and in are T’ed. The fuel is properly pressurized, excess returned to bucket, sent through inline filter, then directly to engine. The fuel bucket is generally always full of fuel. This keeps pump cool and quiet. Pump pulls out of bucket when/if a series of check ***** close to prevent pump from sucking air. This would happen when cornering and low on fuel. I’ve run my LS powered TA down to 2-3 gallons without hesitation or stalling.
Ive never seen a corvette fuel setup but im guessing the LS vettes NEED the external inline FPR. My car originally had one when my tank was sumped and had an electric inline pump.
In the hope of helping OP, I wonder if a f body LT1 pump has the similar FPR like LS1 one. I think you would need to remove it and then use Vette inline FPR. I really don’t see how the pressure will be boosted by the FPR, just me.
edit: if LT1 had FPR at rear of manifold, the pump setup may work. I’d suggest to get a fuel
pressure gauge and connect it to be sure. If pressure is high enough, the vette FPR could be installed near the rear and a very short return line could be used.
Yes, the fuel out and in are T’ed. The fuel is properly pressurized, excess returned to bucket, sent through inline filter, then directly to engine. The fuel bucket is generally always full of fuel. This keeps pump cool and quiet. Pump pulls out of bucket when/if a series of check ***** close to prevent pump from sucking air. This would happen when cornering and low on fuel. I’ve run my LS powered TA down to 2-3 gallons without hesitation or stalling.
Ive never seen a corvette fuel setup but im guessing the LS vettes NEED the external inline FPR. My car originally had one when my tank was sumped and had an electric inline pump.
In the hope of helping OP, I wonder if a f body LT1 pump has the similar FPR like LS1 one. I think you would need to remove it and then use Vette inline FPR. I really don’t see how the pressure will be boosted by the FPR, just me.
edit: if LT1 had FPR at rear of manifold, the pump setup may work. I’d suggest to get a fuel
pressure gauge and connect it to be sure. If pressure is high enough, the vette FPR could be installed near the rear and a very short return line could be used.
Last edited by reedld; 06-18-2018 at 02:10 PM.
06-18-2018, 06:19 PM
#13
The LT1 pump with the Corvette filter/regulator will work fine in most stock engines. I have been running TPI pumps for over 17 years in a couple of my swaps just because when I built them I didnt know any better. Is it the best way? Probably not, but it absolutely will work.