Limits of a single pump

[Z28pr0jekt]

So when I figure out my fueling situation I need to know if i NEED to go to dual pumps or not

What is the largest (highest) flowing single pump I can fit comfortably in our tank and the limits of it?

This will be for a turbo 355 74mm turbo ranging from 5-15psi.. I don't expect to make anymore than 650whp more realistically 600whp

[Stroked96Bowtie]

I believe the walbros are rated at 550hp...not sure if thats rwhp or flywheel. Either way you'll probably benefit from duel pumps. I will be adding another pump to my tank a little later this year.

There is a great write up on LS1tech that mightymouse did.

Are you thinking about putting it together yourself or buying a Nasty setup?

[Fastbird]

So when I figure out my fueling situation I need to know if i NEED to go to dual pumps or not

What is the largest (highest) flowing single pump I can fit comfortably in our tank and the limits of it?

This will be for a turbo 355 74mm turbo ranging from 5-15psi.. I don't expect to make anymore than 650whp more realistically 600whp

Just an FYI, but the Corvette Guys are making in the 650-700 range on a single and 60# injectors with a Whalbro 255LPH and a Boost-a-pump. Granted, that's at 58 PSI though. On our 43.5 PSI system, I don't think I'd try to push it past about 550 or so, even with a BaP.

Here's a read for you though, food for thought if you can find one: http://forums.corvetteforum.com/showthread.php?t=2039175&highlight=system+fuel+return

[Z28pr0jekt]

I believe the walbros are rated at 550hp...not sure if thats rwhp or flywheel. Either way you'll probably benefit from duel pumps. I will be adding another pump to my tank a little later this year.

There is a great write up on LS1tech that mightymouse did.

Are you thinking about putting it together yourself or buying a Nasty setup?

I don't see that NASTY makes a kit for the LTx's.. If I can find a kit for a good price i'll get it, if not then it will be done by hand


Just an FYI, but the Corvette Guys are making in the 650-700 range on a single and 60# injectors with a Whalbro 255LPH and a Boost-a-pump. Granted, that's at 58 PSI though. On our 43.5 PSI system, I don't think I'd try to push it past about 550 or so, even with a BaP.

Here's a read for you though, food for thought if you can find one: http://forums.corvetteforum.com/showthread.php?t=2039175&highlight=system+fuel+return

wow that's crazy... how much work would it take to fit one of those pumps correctly in an fbody

[Fastbird]

I don't see that NASTY makes a kit for the LTx's.. If I can find a kit for a good price i'll get it, if not then it will be done by hand

Nasty does. I was talking with him about it but didn't like how pricey he was. $225 for welded rails alone wasn't very attractive to me, hence my rails which I have nowhere NEAR that in.


wow that's crazy... how much work would it take to fit one of those pumps correctly in an fbody

If you take the factory bucket out of the equation (I.E. delete it), it would be like wiring any other pump in.

[Z28pr0jekt]

So I would probably need either two supra pumps or one of those modded pumps?

[Fastbird]

So I would probably need either two supra pumps or one of those modded pumps?

It would be interesting to see how one of those modded pumps worked out. Frankly though, do yourself a favor and just build the double pumper. I did Call911's and it was very easy. This way you'll be safe and sound without worrying about fuel.

[Chopstix]

A fuel system is never anything I look to put together "cheaply".

For a single pump setup to support high HP levels I would look into converting to an Aeromotive A1000. A little more pricey but would easily support your power goals now and in the future.

[Fastbird]

A fuel system is never anything I look to put together "cheaply".

For a single pump setup to support high HP levels I would look into converting to an Aeromotive A1000. A little more pricey but would easily support your power goals now and in the future.


Since that's an external, would he be looking at baffling the tank and a complete -an setup at that point also though? I'm not questioning the A1000, at all, but moreso the cost involved. You can do the same as the A1000 for 85% of the higher HP cars out there with the twins in-tank.

[Z28pr0jekt]

I'm not trying to be cheap or anything but my funds are limited... this is not an all out bad ass build as it will still have stock heads and intake...

This is going to be a DD as it always has been and will regularly see trips from NY-FL and and back

I know that I will not have the money for a full conversion like that and I wont have the time either.

What is a basic double pumper setup to handle say.. 750whp to give myself some room. What all will need to be done?

[Grr]

Definately do the double. I maxxed out a my single walbro on my GN at around 600whp. This was with all -8 size line. I was running it static at 40psi and maxxing out the 65# injectors to get a bit more flow. Wound up picking up around 40whp by doing this before pressure would drop. My experience with dual pumps has been with the buicks, though my T/A has one as well. I have witnessed many 700+whp cars running dual walbros, some as high as 900whp with no pressure drop. I have never had a problem with Lonnies/Racetronix products and i recommend them.
http://www.lonniesperformance.com/fuelsystems.htm
On another note, i have had many problems with the A1000, and i wouldnt put that pump on a go-kart, its junk. I know alot of people run them succesfully, but they are hit and miss. I would recommend MagnaFuel products LONG before the A1000, and that seems to be the consensus of 90% of the high Hp guys. In fact, on a build i did a couple years ago, 408 chrysler in a 70 cuda, F1r procharger and E85. Had 2 A1000s go out, maxxed the third one out at 625whp. Put a magnafuel (750 i think?) and never had any overheating issues, and never ran out of fuel. Plus they are rebuildable when they do go.
Gary

[Fastbird]

I'm not trying to be cheap or anything but my funds are limited... this is not an all out bad ass build as it will still have stock heads and intake...

This is going to be a DD as it always has been and will regularly see trips from NY-FL and and back

I know that I will not have the money for a full conversion like that and I wont have the time either.

What is a basic double pumper setup to handle say.. 750whp to give myself some room. What all will need to be done?

Call911 has a basic double pumper I built. Dual in tank Whalbro 255LPH's ($110 each from APE), stock regulator, lines, rails, filter. Boost referencing the 2nd pump off a hobbs (no shit HOBBS, no some imitation) pressure switch. Total investment was around $300 given wiring, switch, pumps, short sections of line, y-block, and fittings. That's supporting a solid 615 RWHP and not showing any signs of pressure drop at all.

[Z28pr0jekt]

Call911 has a basic double pumper I built. Dual in tank Whalbro 255LPH's ($110 each from APE), stock regulator, lines, rails, filter. Boost referencing the 2nd pump off a hobbs (no shit HOBBS, no some imitation) pressure switch. Total investment was around $300 given wiring, switch, pumps, short sections of line, y-block, and fittings. That's supporting a solid 615 RWHP and not showing any signs of pressure drop at all.

wanna build me one haha :) next semester that is... will come with additional purchase of fuel rails haha

[Fastbird]

wanna build me one haha :) next semester that is... will come with additional purchase of fuel rails haha

I'll build you one sure, but to be truthful, you don't need the rails for what you're looking to do. Use the 93 rails and an AFPR and you should be fine.

[Z28pr0jekt]

I'll build you one sure, but to be truthful, you don't need the rails for what you're looking to do. Use the 93 rails and an AFPR and you should be fine.

will that afpr you showed me that youre using on yours work for 93 rails?

I know I may not need them not but remember I'm still going to have alot of room to grow as I will still be able to get ported heads/intake which will substantially increase my output

oh and let me know what you'd be looking for to build it pm me if you wanna

[Z28pr0jekt]

will that afpr you showed me that youre using on yours work for 93 rails?

I know I may not need them not but remember I'm still going to have alot of room to grow as I will still be able to get ported heads/intake which will substantially increase my output

oh and let me know what you'd be looking for to build it pm me if you wanna

mrow?

[LT1_Fireman]

Call911 has a basic double pumper I built. Dual in tank Whalbro 255LPH's ($110 each from APE), stock regulator, lines, rails, filter. Boost referencing the 2nd pump off a hobbs (no shit HOBBS, no some imitation) pressure switch. Total investment was around $300 given wiring, switch, pumps, short sections of line, y-block, and fittings. That's supporting a solid 615 RWHP and not showing any signs of pressure drop at all.

I have twin pumps and pressure is solid at 700+ to the ground and its easy to build a twin setup.

[kugss]

Bosch makes a 300lph pump that can be put in tankfor around 200 bucks. A freind has two intank pumps that support 890hp to the wheels. Its called the 044 pump.

[8SEC6SPD]

i installed a lonnies performance twin in tank pump and love it! top quality stuff! i would recommend it to anybody!

[paul95z]

I also run the lonnies dual in tank set up. Lonnie said he has seen over 900+ on the dyno with twin 255s in the tank on stock fuel lines. Mine ready to drop in with the racetronix harness was around $550.

[Z28pr0jekt]

I also run the lonnies dual in tank set up. Lonnie said he has seen over 900+ on the dyno with twin 255s in the tank on stock fuel lines. Mine ready to drop in with the racetronix harness was around $550.

link?

[paul95z]

First post on page 2 has a link to lonnies site.

[Z28pr0jekt]

First post on page 2 has a link to lonnies site.


GM Camaro/Firebird LT1 Double Pumper - Twin High Output Fuel Pump Kit, Wiring Harness & Hobbs Switch - Fully Assembled & Tested - Requires your sending unit for modification 1993-1997 RX-FLT1-GSS340-DP-PKG $555
that one? did you actually have to send in your sending unit? does it hook up to the stock lines?

[paul95z]

Yes and Yes and Yes. Turn around from me sending my stuff in and back to me was roughly 2 weeks. Since I was going to a nitrous set up, the hobbs switch didnt appeal to me. Lonnie made some changes to the harness and included a toggle switch that arms my N2O and secondary fuel pump together. The harness also includes plugs that allow you to switch the pumps from primary to secondary to keep the run time a little more equal.

Sad thing is Ive never sprayed the car yet, so the second pump has never been used lol.

[Z28pr0jekt]

Yes and Yes and Yes. Turn around from me sending my stuff in and back to me was roughly 2 weeks. Since I was going to a nitrous set up, the hobbs switch didnt appeal to me. Lonnie made some changes to the harness and included a toggle switch that arms my N2O and secondary fuel pump together. The harness also includes plugs that allow you to switch the pumps from primary to secondary to keep the run time a little more equal.

Sad thing is Ive never sprayed the car yet, so the second pump has never been used lol.

Hm thanks, maybe I'll just buy a new sending unit and send it to them to cut down on down time. The hobbs switch will probably work for me since it is boost activated.

Ah so you mean so you don't wear out one pump you can switch it back and forth from time to time

[paul95z]

Ah so you mean so you don't wear out one pump you can switch it back and forth from time to time

Exactly. One thing I wish they did differently is the harness is made for the battery under the hood. Mine being in the back of the car, I had about 6 feet to much harness.

[8SEC6SPD]

you can flip/switch the pumps by simply unplugging a connector. i am glad the harness was long...my battery is mounted where it is supposed to be.... under the hood! :)

have you priced a sending unit assembly lately!!! i was going to do that when i priced one out and said forget it!!! lol!!!! it was a large chunk of change. i mean if i needed it done in a day or 2 I would have but luckily I wasn't in that position, and had a week to spare.

[Z28pr0jekt]

you can flip/switch the pumps by simply unplugging a connector. i am glad the harness was long...my battery is mounted where it is supposed to be.... under the hood! :)

have you priced a sending unit assembly lately!!! i was going to do that when i priced one out and said forget it!!! lol!!!! it was a large chunk of change. i mean if i needed it done in a day or 2 I would have but luckily I wasn't in that position, and had a week to spare.

Lol no I haven't... *runs to gmpartsdirect*

[Z28pr0jekt]

well gmparts direct has a stock fuelpump that comes with the sending unit for 188.81 but I'm not seeing the sending unit alone

edit* I found the fuel gauge sending unit? for $290.74
Is that what I would need?

lol then what is the sending unit that comes with the pump?

[8SEC6SPD]

edit* I found the fuel gauge sending unit? for $290.74
Is that what I would need?

lol then what is the sending unit that comes with the pump?[/quote]

bingo!! i believe that is what u would need! feel free to call Lonnie, he is great to speak with!!! but i had considered it until i priced one just to speed things up, lol!!! :jest:

[paul95z]

Maybe an easy find at a junkyard. The parts needed I figure one from a v6 car would work.

[Z28pr0jekt]

Maybe an easy find at a junkyard. The parts needed I figure one from a v6 car would work.

yea that involves having free time... lol law school doesn't give me much of that

[8SEC6SPD]

is the car a daily driver? if so I can see why you need it up and running immediately.

[Z28pr0jekt]

is the car a daily driver? if so I can see why you need it up and running immediately.

yea it's my DD... when the car goes into the shop for the motor swap and everything next semester, my buddy is going to let me borrow his car (I'm gonna give him some money for his trouble) he lives on campus so he doesn't have to worry about driving to class like I do.

I just don't want to put him out too long