IS there any in-tank fuel pump that can handle 600-700hp

[djsm1769]

im gonna be tunning for 650hp i just want to know if there is any in-take fuel pump that can handle that power all 6an fuel lines.

 

[95blackGsTurbo]

Walboro 255LpH should be just fine. I know a couple people around here pushing upwards of 700hp at least and they are still using that fuel pump.

 

[L2RTSiAWD]

A couple people are running duel Walbro's in tank.

 

[djsm1769]

i was thinking of getting hks or supra in-take pump also dual pump in-take is custom and dont know where i could buy that????

 

[95blackGsTurbo]

First off I think you mean in-TANK not in-take. Second supra fuel pump would also be sufficient. They flow just as much as the Walboro 255. You could do a dual in-tank setup but I would only do that if you are drag racing specifically.

 

[djsm1769]

so the supra pump can handle this power? i dont want to get somthing that i have to buy again.


91 talon awd, i got fp-3065 crower/ross, hks 272/272 race head, magnus intake ,fmic hicp, 1000cc, afpr,filter all 6an fuel lines, agx/h&R, AEM ems, aem cdi, 3inch exh, tial bov and 44mm gate.

 

[logic]

91 talon awd, i got fp-3065 crower/ross, hks 272/272 race head, magnus intake ,fmic hicp, 1000cc, afpr,filter all 6an fuel lines, agx/h&R, AEM ems, aem cdi, 3inch exh, tial bov and 44mm gate.

Good, we now have enough information to give you a decent answer.

First, to a previous poster: saying "some guy laid down 700whp with a 255HP, so you'll be fine" skips a lot of information that would make that proclamation useful. Let's walk though a theoretical situation to see just how many assumptions go into the design of a fuel system.

First, a few links:

http://www.rceng.com/technical.htm
http://www.stealth316.com/2-fuelpumpguide.htm
http://www.stealth316.com/2-injectortypes.htm
http://www.2gnt.com/www/corbin/choosefpr.html
http://www.2gnt.com/www/corbin/chooseinj.html
http://www.2gnt.com/www/corbin/example.html

Done reading all that? Good. Now, we have a target: 650bhp (I'm using bhp, because accounting for drivetrain loss will even further muddy the waters) on a turbo 4g63. We know your engine, turbo, and head should be up to the task. Next, we need to come up with a possible brake-specific fuel consumption level for the engine. For the sake of safety, let's err on the high side and call this 0.6.

We now have enough information to calculate how much injector we need. You'll need HP x BSFC = 650 x 0.6 = 390 lbs/hr of fuel. Now, consider that you've got four injectors, and we'll add another assumption to the pile: that we're going to target an 80% duty cycle. So, flow per injector at 80% duty cycle comes out to Total Flow / (# of injectors x DC) = 390 / ( 4 x 0.8 ) = 390 / 3.2 = 121.875 lbs/hr. Multiply by 10.5 to give us cc/min, since that's what we're used to seeing, and you get 1280 cc/min total fuel flow needed. Recalculating this for a 0.5 BSFC gives us about 1066 cc/min. So, 1000 cc/min injectors will probably cover you if you go with a slightly higher duty cycle, but 1600s would certainly give you more headroom.

Now, let's talk about fuel pressure. I'm going to use 2g standard fuel pressure (43.5psi) as a guide here, because that's what everyone rates equipment at, not the 37ish that 1gs run. To talk about maximum fuel pressure, we need to talk about boost pressure; on a 3065, I'm going to make another assumption that you're running in the neighborhood of 30-35psi on the high side. Hence, we have a maximum fuel pressure of right around 75-80psi.

Now assuming you've re-run the wiring to your fuel pump, it should be able to operate at 13.5V. Taking a look at the fine work work of others, we start getting an idea of what kind of flow rates we'll see, knowing that we want to hit between 1000 and 1200 cc/min (240-288 lph) at 80psi. That's a tall order from a single pump. In fact, the beloved Supra pump doesn't even quite do it, pumping out 185lph at 80psi at 13.5V, and the Walbro 255HP only manages a bit more at 190lph. I believe Bosch makes a higher-flow in-tank pump (044?), but I'm afraid I don't have any more details on it, and I understand that it's an expensive option. The HKS-1407-RN019 would appear to just barely make the grade.

Other options include lowering your base fuel pressure (which will have an effect on injector choice), lowering boost (yeah, right), or going with two pumps. The last option is pretty popular; a Walbro GSS342 or Supra pump in-tank, and a Walbro 392 in-line seems to be a common configuration, or a pair of GSS342/Supra pumps in-tank together. I'd probably go this route if I were you; if you're really opposed to an external pump, dropping both in-tank would work nicely.

 

[destruckeclipse]

Awesome info from logic there.

 

[djsm1769]

so is a walbro or supra pump the way to go to dyno 650hp?

 

[destruckeclipse]

Here's a hint.

The last option is pretty popular; a Walbro GSS342 or Supra pump in-tank, and a Walbro 392 in-line seems to be a common configuration, or a pair of GSS342/Supra pumps in-tank together. I'd probably go this route if I were you; if you're really opposed to an external pump, dropping both in-tank would work nicely.

Maybe you should re-read everything to make sure you understand all of it.

 

[djsm1769]

thanks for all the help just bought a bosch intank #040 cost 290.00 with shipping. claims to handle 700hp.