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What Intank Pump Will Deliver The Most Flow? Nismo?

Marko R1

By Marko R1,
in Engines & Forced Induction

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scotty nm35 Grand Master

scotty nm35

Posted
Posted

If you buy a genuine Walbro you should have no issues, it's the knock offs causing the confusion.

I have twin 255's intank and have been running them for years on e85 without a problem. These days I would go for the e85 416L version just for the sealed plug and the fact they are designed for long term ethanol use.

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Nee-san
Nee-san

I think your going to struggle to push that much power through a single pump without going to one of the really big aeromotive units or something similar marko. what's the reasoning for not wanting a

scotty nm35
scotty nm35

It's just that time of the month...

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B-rice Mentor

B-rice

Posted
Posted

I wonder if my Nismo pump will last long term on ethanol. I haven't heard anything bad yet about the e85 walbro pumps so they must be a good upgrade from the standard pump.

Nismo over engineer their things, im sure they would have had race gases similar to E85 being tested with the pump during their their RnD. Im slapping mine in soon hope it lasts.

limpus Mentor

limpus

Posted
Posted

Since this discussion is ongoing...I'd like to pose a question...

How much power roughly do you think a single Sard 280LPH intank pump would support on a 2JZ?

I'm at 325rwkw atm on eflex but I'm thinking of turning the wick up alittle more...

sonicz Rising Star

sonicz

Posted
Posted (edited)

"If you buy a genuine Walbro you should have no issues, it's the knock offs causing the confusion.

I have twin 255's intank and have been running them for years on e85 without a problem. These days I would go for the e85 416L version just for the sealed plug and the fact they are designed for long term ethanol use."

In regards to the Nismo pump, I'm running one on e85 with no problems at all. I stayed away from your standard Walbro pump just from the fact that they have a higher tendency to fail. I know a few guys who have had problems after a period of time.

I've heard this too. So i was never convinced the walbro were perfect little gems to begin with. Thats why I had no problems deciding to give This is the "fake" walbro pump a go as well

http://www.ebay.com.au/itm/GSS341-Type-340L-H-Performance-Fuel-Pump-Skyline-GTR-RB20-RB25-RB26-R32-R33-R34-/110983052442?pt=AU_Car_Parts_Accessories&hash=item19d71afc9a&_uhb=1

They claim 340L/PH. I"m not sure if anyone has verified it. I did get a genuine 255 too. Didn't notice any difference in the way the car ran between the two.

Anyway I will think about cleaning the injectors, or possibly buy another set for not much more than clean. Boost is staying low for now.

Can anyone extract any data out of the spark plugs?

5k298p.jpg

2w207sk.jpg

Red spark plugs? hmmm.

Edited by sonicz
vspecIInur Experienced

vspecIInur

Posted
Posted

I would be curious to know as well. I will try and squeeze every kw out of my nismo pump before I need to move on :)

What's generally the limit i.e. maximum power for the nismo pumps?

B-rice Mentor

B-rice

Posted
Posted

I would be curious to know as well. I will try and squeeze every kw out of my nismo pump before I need to move on :)

What's generally the limit i.e. maximum power for the nismo pumps?

RHD says 550ps and im sure it will get there and probably over.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

regarding the walbro 450lph E85 fuel pumps....what power have people made with these and at what boost (psi)? have we found the limit of these pumps yet??

They are rated @ 450lph @ 0-30psi... A stock RB fuel rail runs a higher base pressure than that :whistling:

Once you get them to 60-70psi (which is what most people will be running), the flow drops to under 400lph, maybe even 360lph - I saw the rating graph from Walbro 450l a few weeks back but for the life of me i can't find it right now.

Gotta love the online retailers at the moment claiming they will support "900hp on a turbo set-up", maybe if you used two they would.

SiR_RB Grand Master

SiR_RB

Posted
Posted

Haha exactly right

I'm running one getting 13.8volts, with my base pressure at 55psi and 26psi boost it made 410rwkw on e85,

Obviously lower and or stock rail pressure and lower boost will net more flow

scotty nm35 Grand Master

scotty nm35

Posted
Posted

I have been recommended by quite a few knowledgeable tuners recently to bump up my base pressure, (I am running 40 psi with the hose off) The bosch ev14's apparently spray a beautiful mist at 90-100psi but there aren't any intank pumps out there that flow much at such high pressures, certainly not the 255 twins I have currently.

To test my theory (more pressure = finer mist = better power and economy) I would need a large mechanical gear pump off the fuel cell, I am thinking one of these Magnafuel external pumps which are rated up to 120psi.

http://www.magnafuel.com.au/index.php/efimenu/efipumpsmenu/protunermenu

Might be time to ditch the twin intanks I think.

post-63525-0-36682600-1369965751_thumb.jpg

SiR_RB Grand Master

SiR_RB

Posted
Posted

Yep injectors needed abit of help and also idles better so maybe the higher pressure is atomizing better?

My next step besides cams cos my stockers are holding me back would be 2000cc injectors and maybe a fuel lab external pump

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