What Intank Pump Will Deliver The Most Flow? Nismo?

[B-rice]

Scratch that ill be getting a Nismo 4.1l/min chasing 360kw on E85.

[sonicz]

Scratch that ill be getting a Nismo 4.1l/min chasing 360kw on E85.

Last time I was looking at a nimso pump I read that its "not suitable for e85"

[B-rice]

Nah it's a tough pump have a look at SS8_Gohan. He has a thread about mission complete thanks to chequered tuning a few guys on there have nismo/tomei pumps running E85.

[scotty nm35]

Not suitable means untested, just a way to protect them from unknown issues that may arise.

I ran my Tomei for a year on e85, and now Artz has it on e85 and petrol with no issues. I would still get the Walbro e85 pump over it, simply as it is half the price.

[B-rice]

But the you pay extra coin for Nismo /tomei pump coz they plug and come with everything you'll need. Don't know which pump would last longer though.

[sonicz]

I should have gone for the NISMO or walbro 400LPH too. Instead I got two wlabro 255 pumps a few weeks apart. One is genuine one turned out a copy. Both cost me around $100. The both seem to flow the same :S. I was thinking of running them together, but I was told I cant run dual 255s on stock wiring. Which draws more power, two 255 pumps, or one 400LPH walbro?

The nismo runs on stock wiring because it has the damn stock connector. So easy.

You think I could sell the two pumps?

Edited May 17, 2013 by sonicz

[scotty nm35]

I run twin 255's, they are good pumps and will outflow the 400 in twin setups, at much less current. The 400L does like higher pressures though...

Any aftermarket pump should have new thicker wiring run to it, through a fuse and relay, even the Nismo will operate much better with a good power feed.

[sonicz]

I understand they will run better with new wiring, but with two 255 pumps I will have more than enough flow anyway. As long as the stock wires don't burn out I'm happy. Will they if I connect two 255 pumps with the second one connected in parralel (i.e spliced into the wires that feed the first)?

My reasoning is The 400LPh pump comes with the same gauge as the stock wiring. So clearly that the stock guage can handle it.

If the 400LPH pump draws more than two 255s and the stock guage wiring can handle it, it reasons that two 225s will work on stock wiring as well?

No new wires or relays, just the earth mod to the chassis to keep the voltage from dropping to 9V in an R33 and that's it?

[battery]

I understand they will run better with new wiring, but with two 255 pumps I will have more than enough flow anyway. As long as the stock wires don't burn out I'm happy. Will they if I connect two 255 pumps with the second one connected in parralel (i.e spliced into the wires that feed the first)?

My reasoning is The 400LPh pump comes with the same gauge as the stock wiring. So clearly that the stock guage can handle it.

If the 400LPH pump draws more than two 255s and the stock guage wiring can handle it, it reasons that two 225s will work on stock wiring as well?

No new wires or relays, just the earth mod to the chassis to keep the voltage from dropping to 9V in an R33 and that's it?

Your not getting it man.

Even if the stock wiring doesn't melt i can almost guarantee that there will a decent amount of voltage drop which is bad news for the walbros as they seem to die often if they don't get a healthy supply.

If your looking at running 2 then you must have a lot of other work planned for the car so whats a few hours to run a new feed with a relay?

For piece of mind don't you its better to do it properly?

[sonicz]

The reason is I don't trust myself with electronics and wiring. I am finding the more I touch what doesn't absolutely need to be touched the worse I make the car. It will be the opposite of peace of mind but a complete breakdown. I am fairly sure I will screw something up. Then when I give up and want to go back to stock my oem parts will be butchered, connectors will be broken, wires shortened, I will make a mess, blow stuff up, car will smell on fumes from new wires drilled into thru clips, I will need new wiring harness, oem parts. More money down the drain etc.

Actually I plan to do nothing hardcore with the car as of now. Its more so for future-proofing and to possibly solve a hard to kill pinging problem I am having now even at this basic tune level. I know it contrary to general knowledge but I feel like I am not getting enough fuel with one 255 on a mostly stock car, just boosted. With the stock pump it actually pinged less down low, only up high. With the walbro it seems to have flipped and I'm getting massive pinging down low at 2000-3000rpm at 10psi+. I gotta keep the stock boost or the car rattles its head of. And I Have done everything else I can think of to diagnose the problem beside fuel.

Edited May 17, 2013 by sonicz

[battery]

sounds more like you got a blockage or stuffed injector.. changed the fuel filter?

Is the ECU running the standard tune? What about BOV?

You ain't gonna solve the issue with more pumps.

[Deano 1]

Yea at 10psi you deff don't have a pump probelm, I made 330 kw with the factory pump with no issues.

[Marko R1]

Yea at 10psi you deff don't have a pump probelm, I made 330 kw with the factory pump with no issues.

agreed as I made 365awkw with stock pump

[sonicz]

agreed as I made 365awkw with stock pump

Yea at 10psi you deff don't have a pump probelm, I made 330 kw with the factory pump with no issues.

I agre, but why do so many people, even for basic stage 1 mods list to change out the factory pump for a 255? I've seen people reporting running out of fuel with a walbro at less than than the power you guys are quoting. I wouldn't be surprised if its a downgrade over the stock, especially when considering the sizes of them but Im always told no the walbro is better.

I'm also not saying I disagree with you guys that maybe a bigger pump wont solve my issue, but If a car is pining the first thing you think of is its running lean. So I thought get more fuel in there.. The walbro did nothing to help my pinging issues, but then again it could be flowing less than stock and in addition my stock may have been stuffed.

sounds more like you got a blockage or stuffed injector.. changed the fuel filter?

Is the ECU running the standard tune? What about BOV?

You ain't gonna solve the issue with more pumps.

The fuel filter has been changed about 5 months ago. I will do it again though, just in case.

The ECU is standard. Standard BOV.

I have tried, Fake walrbo 255, and a genuine walbro 255, Car still pings above 9-10PSI or so.

Heres else what I've tried so far in addition to the above.

-New FPR. Brand new nismo item. I have set the pressure way higher than recommended and it still pings.

-Compression test of the engine. All cylinders ~ 147 PSI.

I have tried these spark plugs.

BCPR5ES

BCPR5ES-11

BCPR6ES

BCPR6es-11

BCPR7ES-11

BCPR5ES-11

With BCPR7ES-11 the car didn't ping. But that's not surprising as it was abysmally slow. Easily a 130Hp or more drop over the bcpr5es.

Car runs best on BCPR5ES-11. Currently have BCPR6ES-11 in there for a safety buffer, even though I prefer the 5s.

-Currently running yellow jacket coils.

-New coil pack wiring harness.

-New AFM.

-New CAS.

-Fitted bigger intercooler.

Whats next? Bigger injectors and Aftermarket ECU and a tune right? But thats many many thousands I shouldn't need to spend just to run a stock car at 10psi. Nor can I.

Very frustrating.

Edited May 19, 2013 by sonicz

[scotty nm35]

What's to be frustrated about? If it isn't the fuel feed it's the injectors, get them cleaned and tested as one may be blocked.

[sonicz]

Alright. how much does that cost? Recomendations on a place?

if cleaning and testing is almost half the price of new injectors I may as well get new ones.

Edited May 19, 2013 by sonicz

[scotty nm35]

I was quoted $25 an injector from my wholesaler, Aznew. Without a location it makes it very hard to suggest someone to help...

[sonicz]

My bad. Im used to having a location under my avatar.

I'm in syd.

cant i just try clean them myself? plenty of youtube vids on this.

Edited May 19, 2013 by sonicz

[scotty nm35]

They need to be cleaned in an ultrasonic bath of cleaning solution, with the gauze filter in the end removed, back flushed, then flow tested. With the right equipment you could set up a jig but it would cost a lot more than $150.

[vspecIInur]

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.