CO_VR4

iTrader: (83)

The Supra Denso pump outflows the Walbro 342 up to 65PSI, and then drops slowly lower as fuel pressure increases. Both pumps are sensitive to voltage, but the Supra pump uses more amps. The Supra pump is much quieter and most would say more durable. Supra pumps flow plenty for 500HP applications in most cases.

ItalianEvo

Yes, correct...

but you know it depends on the boost you have to use to reach 500whp...

if I need 51 base fuel pressure + 29 psi of boost to reach those whp numbers, than I have to look at good fuel pump with a good flow at 80 psi...

Power Enterprise seems to flow 220 lph @ 80 psi... so much better than Walbro and Supra pumps...

Spec'd

iTrader: (16)

That's all fine and dandy, but the only way to get the Supra pump to fit
is by performing a complete mutant mickey mouse install for the Evo.
( I researched as I really wanted to install a Supra Denso pump ).

The Evo pump housing is plastic and completely different than VR4 or DSM housings.

I installed the Walbro a couple of weeks ago. So far I hear no noise what-so-ever.
Looking at the Walbro as a whole, it appears to be a real good quality pump.
You can see the metal gears. The only thing I didn't like was the plastic base.

Anyways, for the cost of the Supra pump, I can almost buy three Walbro's.

mrfred

iTrader: (50)

Has anyone ever dissected a failed Walbro 342 to determine what broke?

TrinaBabe

iTrader: (3)

Figure I would post up my new fuel system which should be done within a week hopefully. It is bigger than all of these so far.

It is the Aeromotive Mechanical pump mounted on the front of the block using a custom spindle mounted to the crank pulley driving a belt that drives the pump. It flows around 2500 lbs / HR at whatever psi you could run. You need a larger pressure regulator to actually bypass enough fuel. The cell currently is still the 8 gallon cell in the rear with the -10 feed lines pumping to 8 injectors. Ill post up pics when its all said and done.

CO_VR4

iTrader: (83)

That's an interesting setup. It's been done with the same pump on a 2g Eclipse turbo here in Colorado, driven off the cam sprocket. He uses the stock pump for the primer.

liberty2000rs

iTrader: (13)

Have any of you seen how AMS plumbs the AN bulkhead to the Intank Walbro?

I like the idea of running two walbro's one in the tank, and one inline, but I dont see how they make it work without completely gutting the pump hanger.

Ted B

iTrader: (6)

Unnecessary

04 evo

iTrader: (13)

subscribing

dubbleugly01

iTrader: (24)

why do you need 51 psi base? That's extremely high.

ItalianEvo

It was an ipothetic example:
if you, for some reason ( small injectors... ), need to raise up fuel to lower inj duty cycle, you'll HAVE to look at the fuel pump flow given at the (base+boost) fuel pressure.

And btw 51 psi base is not that high:
till you have an idle issue, there are not other problems with an higher base pressure..

Ted B

iTrader: (6)

The best policy is to size the injectors (and the rest of the system) properly, and leave the base pressure alone. If everything is done correctly, there is no reason to ever change it.

Smogrunner

iTrader: (5)

Ted,
Unfortunately, I have to tweak my base idle fuel pressure when tuning for max power with my 880s. I've gone as high as 55psi (12 psi higher than stock) and have had no problems with drivability. I'd definitely rather have slightly larger injectors than have to do this but that would be over $400. We may try to hit 600whp this week in preparation for my September 23 drag race, and to do this we may push it as high as 60psi if it will work...

TrinaBabe

iTrader: (3)

Most injectors are only rated to around 80-90 psi... if your base is 60 I wouldnt run 30psi... the injectors may actually fail.

If anyone is interested in an A-100, -10 feed lines, aeromotive regulator and an 8 gallon cell that fits perfect in the trunk let me know

trinydex

iTrader: (12)

anyone have a how to on how to put the supra pump in?