Fuel pump upgrade
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Fuel pump upgrade
I need some help, I have to ask this here because it's specific to a 92-96 fuel system (the 87-91s are slightly different).
I need a high performance fuel system to feed a 425+ hp engine (my 393). I need some advice on what to do, they don't seem to sell an upgraded fuel pump as a drop-in replacement. Can anyone help me on this, I'm desperate, I need to get my project done...the 393 is almost done and it's about to get installed over the next few weeks, so I need to sort out this issue soon. Thanks.
I need a high performance fuel system to feed a 425+ hp engine (my 393). I need some advice on what to do, they don't seem to sell an upgraded fuel pump as a drop-in replacement. Can anyone help me on this, I'm desperate, I need to get my project done...the 393 is almost done and it's about to get installed over the next few weeks, so I need to sort out this issue soon. Thanks.
Posting Guru
Joined: Mar 2003
Posts: 1,311
Likes: 0
From: Quispamsis, N.B, Canada
Just a thought mustang, maybe a fuel pump from another big motor will work. I've figured that the bigger the motor the more fuel it will need thus a bigger fuel pump is needed. You could also try some of the leaders in fuel delivery. If you watch horsepower tv, I've seen many fuel related shows that go along with your problem. Just a thought.
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
Have you looked at a mustang fuel pump to see if it will fit in the truck sending unit? They might be the same, or similar enough to fit in the stock truck sending unit. One other concern I have is the size of the rest of the fuel lines - can the lines flow enough fuel to keep up with the engine?
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
I went to autozone a few months back and looked at a mustang pump, it has a rubber line that goes over the outlet tube, with a nipple on it so when you use a clamp of some sort it doesn't come off. The truck's pump has a outlet tube w/o that nipple, it's just a circular tube which slides into the rest of the unit. I was thinking about trying to file that nipple off a mustang pump and try to slide it in, but I'm not sure if it'll work.
Blurry94, are you able to elaborate further, or know of a place I can find further information? The 190lph would be enough...would like to see a 255 in there but the 190 would do the job. My fuel lines should be ok for this kind of power, it's around 400.
Blurry94, are you able to elaborate further, or know of a place I can find further information? The 190lph would be enough...would like to see a 255 in there but the 190 would do the job. My fuel lines should be ok for this kind of power, it's around 400.
Moderator
Joined: Jun 2003
Posts: 3,547
Likes: 71
From: Calhoun GA
Check out this link....I think you started it ealier this year.
http://www.nloc.net/forum/showthread...h+sending+unit
A little more info...
http://www.nloc.net/forum/showthread...ight=fuel+pump
http://www.nloc.net/forum/showthread...h+sending+unit
A little more info...
http://www.nloc.net/forum/showthread...ight=fuel+pump
Thread Starter
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
I did make that first one, i've seen the 2nd one...i'll look over them again.
They tell ya that a 190 or 255 would fit i guess, but they don't tell ya which one...like i've said the mustang one i saw has the rip/nipple on it for a hose and my truck's doesn't...if I can find a 190lph pump w/o that rib i should be able to slide it in ok.
You'd think by now they'd make this easy for us...
I'm done workin' on trucks for awhile after this project lol.
They tell ya that a 190 or 255 would fit i guess, but they don't tell ya which one...like i've said the mustang one i saw has the rip/nipple on it for a hose and my truck's doesn't...if I can find a 190lph pump w/o that rib i should be able to slide it in ok.
You'd think by now they'd make this easy for us...
I'm done workin' on trucks for awhile after this project lol.
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Moderator
Joined: Jun 2003
Posts: 3,547
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From: Calhoun GA
I think the canister has alot to do with it though. I've never ripped into a standard F-series tank to see if the they're the same as the GEN 1 L's. I believe the GEN 1's use a higher volume FP and that might make the difference.
The one thing I would STRONGLY recommend is to get a Widband O2 to monitor your A/F ratios. I run an FJO on my 94 L and it has helped me tune my supercharged application, and even save me from a rebuild when I pegged my old air meter. That and an in-cab fuel pressure gauge will let you know when you've reached the limits of your fuel system.
The one thing I would STRONGLY recommend is to get a Widband O2 to monitor your A/F ratios. I run an FJO on my 94 L and it has helped me tune my supercharged application, and even save me from a rebuild when I pegged my old air meter. That and an in-cab fuel pressure gauge will let you know when you've reached the limits of your fuel system.
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
I have an air fuel ratio gauge tapped into the o2 sensor on the truck....is that enough? Arnt the wideband sensors really expensive? I would think the EFI system would keep me somewhat safe vs a carb.
Moderator
Joined: Jun 2003
Posts: 3,547
Likes: 71
From: Calhoun GA
The gauges I've seen aren't very accurate as compared to a wideband system. You get an actual number that is taken from it's own sensor, so there is less room for error. My sensor is located right at the header collector which is about the best place to have it. The closer the sensor is to the head, the better.
Wideband systems are more expensive, but you get what you pay for. LM-1 makes a system that is very reasonbly priced and it has data logging capabilities so you can go back and look closely at everything that is going on with your motor after a hard run. If you plan on going with a mail order chip or DIY tuning then it is an essential tool that can help you dial in your combo.
I use mine to tune both of my trucks and I keep it on my SC'ed 94 Lightning so I can continously monitor the A/F ratios...IMO, it has been money well spent.
Wideband systems are more expensive, but you get what you pay for. LM-1 makes a system that is very reasonbly priced and it has data logging capabilities so you can go back and look closely at everything that is going on with your motor after a hard run. If you plan on going with a mail order chip or DIY tuning then it is an essential tool that can help you dial in your combo.
I use mine to tune both of my trucks and I keep it on my SC'ed 94 Lightning so I can continously monitor the A/F ratios...IMO, it has been money well spent.