Last time I had may car tuned it pushed 410rwhp on a walbro 255L pump with no issues. 15psi pull.

Question is that now I am going to be running 50/50 AI injection and want to turn the boost up. Do I need more pump? Tie in my stock 1988 Turbo pump along side?

Car
1988 Turbo II street port T04B 60-1 .96A/R. Haltech E8.
Parrallel fuel system. Marren fuel pulsation and aeromotive pressure regulator.

is it possible to run 22psi+ with this pump/turbo setup?

Thanks,
Ian

 

For the cost of another Walbro I wouldn't chance it...

 

i thought the 255L HP was good for 500hp

 

Go with a MK4 Supra Pump.

 

^^+1^^ cant beat the reliable supra pump

 

Those original numbers are very impressive. I have some questions for you.

Who built the motor? What manifold are you using?

Thanks!

Edit: your cardomain answered some questions, steve kan.

 

walbro is a very respectable pump used on numerous hp cars. just purchase another one if you're worried. 255s flow great.... i wouldn't run any other pump personally.

The supra pump is only marginally better in flow.

 

use a kenne belle boost-a-pump. my friend was flowing over 600 to the wheels on a supra tt pump with a kenne belle, although that was on a piston engine

 

Mazdee's in Pickering ontario. manifold is just a log HKS cast.

this was on a dynojet though. Mustang ran less numbers.

 

that is correct but its pretty much a known fact that the OEM reliability of the supra pump is definitely better then the walbro

 

how does you parrelell fuel system work? my walbro 255 is on the way and I just got 1680cc secondaries. Does anyone know at what point the FPR and or fuel rail need to be upgraded?

 

if your upgrading to a large turbo big pump and stand alone ECU you may as well upgrade the fuel system to work with the other mods..i personally wouldnt want to go above 350WHP without doing fuel regulator and rails although im sure the stock system will suport more it will always be the weak link in your setup if not upgraded

 

we max out single walbro's around 580whp on our dyno dynamics... (piston engines), but on rotaries i don't trust them past 450whp.

 

Well we will see soon enough when I go to the dyno since I don't think I will have time or the parts to install a second pump. I know that increasing the boost on my T04B turbo will not net more hp numpers so I may not need as much fuel as I think. Just more fuel down lower in the rpm band.

Its interesting to see the different views on dual pumps. The only thing that crossed my mind about doing such a thing was the spike in fuel pressure when the second pump comes on line would be a rich spot.

Ian

 

I'm telling you man, Supra TT + Kenne Belle is more fuel than you will ever need

 

Ian, I'm running a Denso pump from RX-7 store and a Kenne belle. Should be good for 500+bhp.

If you're worried about it, look into running the Kenne bel on your existing pump. Its really easy to install (it runs a pressure sensor, and wires in-line to the power wire for the pump and has a controller **** you remote mount) and if nothing else, leave it turned down to 5% and drive the car. If you get it on the dyno and are losing a tad of fuel pressure, bump it up to 10% etc.....its nice because if you don't need it - even if its installed - you can have it "off".

And it will only run when you're in boost, so if you DO need to run it cranked up, its only pumping more voltage into the pump when its needed, it'll still idle and cruise on the walbro alone.

 

Thanks for the fitting. I got it yesturday.

I have a areomotive pressure regulator that as boost increases it bumps the pressure up one to one ratio so at 15psi I guess pushes 15psi motor fuel pressure. Is that the same principle as the kenne bel?

 

Not exactly.

The Boost-a-pump supplys more voltage to the pump, and actually increases the output of the pump itself rather then simply raising pressure. I'd ahve to check with a multimeter, but I run mine at ~18% and its probably supplying in the neighbourhood of 14.5v to the pump itself. Some argue that it'll burn the pump out faster etc etc. but for one, its only on when you're in boost, so its only getting ran hard when it needs to be, and also, I've seen many places list pump outputs at 14-15 volts, so I see no reason why it shouldn't be able to take some sustained operation there.

I probably won't have the need to crank it up much past where it is now iwth my power goals, but I think in both our cases it provides an additional output that - IF - you need, is right there at the turn of a ****.

EDIT: also, it provides a smoothing or regulation of the voltage going to the pump anyways. So say you were running all your accessories and rea defrost and you make a WOT run, the pump may be down .5-1 volt from where it would be normally ................in all fairness I've never heard of anyone losing an engine to that situation, but its always been somthing I've thought about.

 

My pump is wired directly to the battery turned on by the haltech. So it should get 14v all the time. So this just supplys more voltage on boost?

http://www.kennebell.net/accessories...boostapump.htm

Really would hate to have more wiring in my car. LOL. It has a ton of wiring for all of these add on stuff.

 

Essentialy yes thats all it does. and yeah, it does take up a little room, i have mine installed under the bins but I know the feeling....

 

that boost-a-pump is actually pretty awesome! +1 for kenne bell

 

use 2 walbro pumps you should be good with that.

 

Bosch 044 fuel pump. Very minor fabrication needed to install, but a very good pump. CJ

 

the only problem with two walbro's is if one fails you won't know until you go super lean and detonate.

bosch 044 is what i normally use for 500hp cars