fuel system info 5.3 turbo
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fuel system info 5.3 turbo i am planning on going with a turbo setup on a 5.3 in a 1969 chevelle
I have a new factory tank that i plan on adding a sump to what size inlet/ outlet size would be recommended as well as fuel line size?
i plan on running it to the limit and possibly doing additional changes over time so don't want to have to upgrade in future.
what would be the recommend fuel pump for this application walbro 255?
thanks for the help
I have a new factory tank that i plan on adding a sump to what size inlet/ outlet size would be recommended as well as fuel line size?
i plan on running it to the limit and possibly doing additional changes over time so don't want to have to upgrade in future.
what would be the recommend fuel pump for this application walbro 255?
thanks for the help
What are your HP goals? What size turbo? Usually stock 5.3 fuel system is good up to ~400-500~HP depending on amount of boost also.
Usually a 255 intank and some 60# injectors will do the job. Also depends what fuel will you be running, which I think pump gas correct?
As far as fuel line size goes I would say 8 for feed and like 6 for return.
Usually a 255 intank and some 60# injectors will do the job. Also depends what fuel will you be running, which I think pump gas correct?
As far as fuel line size goes I would say 8 for feed and like 6 for return.
Your going to want more than a single 255. You MAY be ok, but why risk running out of fuel and maxing out a pump? My personal setup uses twin in tank walbros which both run all the time, a -8 feed line and -6 return line, and stock fuel rails with 60 lbs injectors. Car has 1200 hard miles on it with the current setup and has been flawless as far as fueling goes. I'm making around 525 rwhp on 11 psi and a pretty conservative tune, so the 5.3 is definitely capable of maxing out one 255 pump.
Or, you can do like me and have dual in tank 255lph pumps and only have 1 running full time and the 2nd to kick in under boost.
A simple hobbs switch will allow this. My 2nd fuel pump kicks on at 4#'s of boost.
A simple hobbs switch will allow this. My 2nd fuel pump kicks on at 4#'s of boost.
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thanks for all the replies
i'm looking to get in the 600's sometime i have not decided on single or twin turbos yet. so i will go with dual fuel pumps to be on safe side, anyone have the model number? Will i be able to install both of them in factory tank? I like the idea of having the second one kick in under boost. Also how many hp will the 60lb injectors support? yes pump gas is the plan.. I would possibly like to have an E85 tune as well if possible
i'm looking to get in the 600's sometime i have not decided on single or twin turbos yet. so i will go with dual fuel pumps to be on safe side, anyone have the model number? Will i be able to install both of them in factory tank? I like the idea of having the second one kick in under boost. Also how many hp will the 60lb injectors support? yes pump gas is the plan.. I would possibly like to have an E85 tune as well if possible
60pounders can be good up to a *safe limit* of ~750ish-800HP~ People have pushed them further. Are you still running the stock 69' tank?
Edit: This can help. http://www.rceng.com/technical.aspx
Edit: This can help. http://www.rceng.com/technical.aspx
Last edited by Blackpanther99; May 27, 2013 at 11:42 AM.
Both pumps fit in the tank. There's tons of us who have done it, and a few threads with pics and instructions on "how to" install them.
The 60# injector limit will be based more upon your setup than a RWHP number. If your goal is 600 at the tires, you should be fine though. I did 614 RWHP and my 60# injectors were fine. However, the duty cycle was fairly high, and I just changed heads and should make more power and I had to step up to 80# injectors to keep it safe as the 60# injectors will now be too small (and I'll be making a lot less than 750 at the wheels).
Lots of guys on here like e85. Its a good safe fuel for a lot less than race gas. Personally, I like inter cooling and meth injection. Its even cheaper, and you can run it with just premium. It may not be an issue for you, but I drive my car a bit, and not everywhere around here sells e85, and the worse gas mileage you get with it means you'll be stopping for a fill up more often. I never liked the idea of taking it on a road trip and not being able to find somewhere that sells e85 when I need it.
The 60# injector limit will be based more upon your setup than a RWHP number. If your goal is 600 at the tires, you should be fine though. I did 614 RWHP and my 60# injectors were fine. However, the duty cycle was fairly high, and I just changed heads and should make more power and I had to step up to 80# injectors to keep it safe as the 60# injectors will now be too small (and I'll be making a lot less than 750 at the wheels).
Lots of guys on here like e85. Its a good safe fuel for a lot less than race gas. Personally, I like inter cooling and meth injection. Its even cheaper, and you can run it with just premium. It may not be an issue for you, but I drive my car a bit, and not everywhere around here sells e85, and the worse gas mileage you get with it means you'll be stopping for a fill up more often. I never liked the idea of taking it on a road trip and not being able to find somewhere that sells e85 when I need it.
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Both pumps fit in the tank. There's tons of us who have done it, and a few threads with pics and instructions on "how to" install them.
The 60# injector limit will be based more upon your setup than a RWHP number. If your goal is 600 at the tires, you should be fine though. I did 614 RWHP and my 60# injectors were fine. However, the duty cycle was fairly high, and I just changed heads and should make more power and I had to step up to 80# injectors to keep it safe as the 60# injectors will now be too small (and I'll be making a lot less than 750 at the wheels).
Lots of guys on here like e85. Its a good safe fuel for a lot less than race gas. Personally, I like inter cooling and meth injection. Its even cheaper, and you can run it with just premium. It may not be an issue for you, but I drive my car a bit, and not everywhere around here sells e85, and the worse gas mileage you get with it means you'll be stopping for a fill up more often. I never liked the idea of taking it on a road trip and not being able to find somewhere that sells e85 when I need it.
The 60# injector limit will be based more upon your setup than a RWHP number. If your goal is 600 at the tires, you should be fine though. I did 614 RWHP and my 60# injectors were fine. However, the duty cycle was fairly high, and I just changed heads and should make more power and I had to step up to 80# injectors to keep it safe as the 60# injectors will now be too small (and I'll be making a lot less than 750 at the wheels).
Lots of guys on here like e85. Its a good safe fuel for a lot less than race gas. Personally, I like inter cooling and meth injection. Its even cheaper, and you can run it with just premium. It may not be an issue for you, but I drive my car a bit, and not everywhere around here sells e85, and the worse gas mileage you get with it means you'll be stopping for a fill up more often. I never liked the idea of taking it on a road trip and not being able to find somewhere that sells e85 when I need it.
I do get your point on gas mileage though. I'm seeing around 6 mpg with E85.
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I'm doing a '69 Chevelle 5.3 turbo also with GTS76 and glide/Ford 9" on e85.
I have a new Buick Grand National fuel tank for it; however am thinking about running a 30 gallon fuel cell instead.
I'm going to do an intank Walbro 400lph and most likely a Bosch 044 external on a Hobbs switch. 120# injectors. -10AN feed.... -8AN return. If your intention is to run e85 from the get go.... then build up your fuel system to feed a healthy amount of ethanol.
I have a new Buick Grand National fuel tank for it; however am thinking about running a 30 gallon fuel cell instead.
I'm going to do an intank Walbro 400lph and most likely a Bosch 044 external on a Hobbs switch. 120# injectors. -10AN feed.... -8AN return. If your intention is to run e85 from the get go.... then build up your fuel system to feed a healthy amount of ethanol.
if you are looking for those numbers, and want to stay single pump look into the Aeromotive 340, or the 400 mentioned above. I a 340 in my c10 and love it. easy to fit and hook up and completely silent
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it is a new fuel tank, so is there a down side to going with the 80lb injectors?
also is it very hard to install 2 pumps in tank vs just 1?
I will start out with premium but may someday try using E85 as it is available all over my area
also is it very hard to install 2 pumps in tank vs just 1?
I will start out with premium but may someday try using E85 as it is available all over my area
no real down fall to the 80's. They just won't have to work as hard to make your power. Their duty cycle will be lower. That will make them live longer and deliver more consistently. I just ordered 72's for mine
2 pumps isn't much harder to do than one. In your case, to convert and old style stock tank, your best best would be to cut an access door in the top of the tank around where the sender/pickup assembly goes in (PLEASE FILL THE TANK WITH WATER BEFORE CUTTING IT!). You can basically hose clamp the 2 pumps together and to the sending unit assembly (assuming it has the rod that protrudes down past the sender, most do) making sure the pickup socks are at the same height, and as close to the bottom as you can get them, but not quite touching it. then you can run the 2 outlets to a "Y" fitting and into the single supply line. Tie your ground wires together to a single wire out of the sending bulkhead to a secure spot. Then tie the hots together. unless you plan on running one pump normally and the second on a boost switch, then you will leave them separate.
If using e85 is even a consideration for you, make sure all the components you use, pump, filter, lines, o-rings etc are all compatible. Ethanol will soften and eat non compatible rubbers
2 pumps isn't much harder to do than one. In your case, to convert and old style stock tank, your best best would be to cut an access door in the top of the tank around where the sender/pickup assembly goes in (PLEASE FILL THE TANK WITH WATER BEFORE CUTTING IT!). You can basically hose clamp the 2 pumps together and to the sending unit assembly (assuming it has the rod that protrudes down past the sender, most do) making sure the pickup socks are at the same height, and as close to the bottom as you can get them, but not quite touching it. then you can run the 2 outlets to a "Y" fitting and into the single supply line. Tie your ground wires together to a single wire out of the sending bulkhead to a secure spot. Then tie the hots together. unless you plan on running one pump normally and the second on a boost switch, then you will leave them separate.
If using e85 is even a consideration for you, make sure all the components you use, pump, filter, lines, o-rings etc are all compatible. Ethanol will soften and eat non compatible rubbers
Or look into the new Holley Billet dual pump. It is external and runs half the pump most of the time unless you kick on the second half. Takes away some of the complication of dual pumps. If you are considering really leaning on the 5.3 and a possible e85 tune, I would overbuild the fuel system. It doesn't cost much more and you will save in the long term by not having to go back and rework everything.
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i think i'm going to go with 80's any specific brand better then others? i also think i will just go with a single larger pump i see a walbro 400+ lph pump rated for e85 i think i will go with. will i be able to use factory plugs to hook to new injectors?
Before you pull the trigger on 80# injectors, talk with whoever is doing your tune, and see what he has to say. You want the right injector for the job. I'm not saying 80# injectors won't work, but if you have good duty cycle left in 60# injectors with your setup, it would be better (and probably cheaper).
Mototron (Siemens Dekka) injectors are top notch and will fit in the factory plugs (they come in both 60 and 80# sizes.
Mototron (Siemens Dekka) injectors are top notch and will fit in the factory plugs (they come in both 60 and 80# sizes.
http://aeromotiveinc.com/products-pa...000-fuel-pump/
Last edited by CALL911; Jun 18, 2013 at 10:36 PM.
