Twin Intank Pumps For A Gtr

[Brezza]

Hi Guys,

I am going to modify my R32 GTR to run E85, my 1000cc injectors just turned up today!

And I have been trying to search around for fuel supply options for E85

I have currently got the following mods:

Rebuilt RB26 with forged internals

2860-5's

Nismo AFM's

full 3in exhaust

660cc injectors

Walbro fuel pump

Turbosmart E-Boost Street

std intercooler

K&N Filter in airbox

It made 350rwkw on a dyno dynamics @ 21.5psi

and made 317rwkw on a mainline dyno @ 20psi

Most people have told me that i'd need twin pump and surge tank setup to really make benefit of e85. but i want to try and steer clear from a surge tank in the boot because i've heard that there is fuel smell issues.

so an under car surge tank would be an option but there is very limited room underneath a R32, so where have people mounted surge tanks under the car if they have.

Also have anyone used any twin intank pump setups?

This would be the most attractive for me because it would be more simpler.

I have done track days and may do 2-3 a year, so its not a purpose track car. i dont drive it regularly hence fuel ecconomy and availability isnt much of an issue for me.

Even if i were to take it to the track again i would take my 3 20L jerry cans and make sure the fuel level doesnt drop below 1/2 a tank. so fuel surge isnt going to be a problem on track.

So if anybody has any results with a twin pump setup in tank please share it with me, it seems to be popular with the BMW guys, and on other forums like the WRX & EVO ones.

Cheers,

[scotty nm35]

You wont get any fuel smells if you do it properly with teflon braided lines, but it is still illegal.

Twin intank walbro's would be the go but a single GTR Nismo/Tomei should just handle that power.

[N1GTR]

^^^ on e85? Doubtful.

Powertune do a bolt in kit for twin pumps in tank. Do a search it's been covered before or call them up

[STATUS]

^^^ on e85? Doubtful.

Powertune do a bolt in kit for twin pumps in tank. Do a search it's been covered before or call them up

Yeah there is a similar kit around too @ half the price, one of my customers just came in with one.... forgot who did it though..

[Beer Baron]

Yeah there is a similar kit around too @ half the price, one of my customers just came in with one.... forgot who did it though..

mmm I'm interested. if you can find out who sells them I might grab one for my new car. want to switch it to E85. currently running a nismo pump, already has 1000cc injecotrs, after a nice 380kw or so with the 2530s it has but don't think the nismo pump will do it.

[Brezza]

Yeah there is a similar kit around too @ half the price, one of my customers just came in with one.... forgot who did it though..

Yeah, if you could find out who the kit was through it would be appreciated!!

I'm just wondering how difficult it would be to modify the cradle and put together a bracket for the twin pumps to sit in?

also at what limit have people found the std fuel lines to run out of flow? what power levels do you have to run twin lines?

Cheers,

[MsR]

any updates on this supplier?

[scotty nm35]

I made my own twin walbro bracket. It surges at around 1/4 tank in my Stagea but that is due to the underseat tank mounting more than the pickup design.

A surge tank would be the best for track, even a small one may do the job.

[luke gtr]

also at what limit have people found the std fuel lines to run out of flow? what power levels do you have to run twin lines?

Cheers,

I'm interested in finding this out too....

[STATUS]

I'm interested in finding this out too....

400+rwkw

400-440rwkw so far without issue.

[log in]

Powerhouse racing sell the aluminum fuel tank hats to run dual pumps last time I looked in their site

[SS8_Gohan]

Nismo intank pump, 400rwkw - no issues that we could tell from this. ID1000's

looked into all of this twin this, surge that, undercar etc... wasn't needed in the end.

pretty much same setup as well, built 26, 2530's.

[blue_vl_t]

Nismo intank pump, 400rwkw - no issues that we could tell from this. ID1000's

looked into all of this twin this, surge that, undercar etc... wasn't needed in the end.

pretty much same setup as well, built 26, 2530's.

on E85??

[Piggaz]

Nismo intank pump, 400rwkw - no issues that we could tell from this. ID1000's

looked into all of this twin this, surge that, undercar etc... wasn't needed in the end.

pretty much same setup as well, built 26, 2530's.

It's funny how similar our setups are.... but I am using HEAPS more fuel than you. Different ways of tuning to achieve the same result?

[Brezza]

I'm pretty happy with the twin pumps i have in tank.

i managed to get them mounted in the stock cradle. after a heap of fiddling with the wiring they're running good now.

it turned out to be a bad connection clip in the fuel tank lid. removed it and ran an earth wire straight to the pumps and its fine now.

still a little low on power.

353rwkw on 24psi but hopefully with either poncams or a bigger cat back exhaust i can stretch some more out of it.

the exhaust is a little restrictive after the front pipe, front pipe is twin 70mm going into at least a 90 or 100mm collector and necking down to 80mm exit. then the decat has a 76mm flange so there is a fair restriction there.

[R31Nismoid]

24psi and E85?

Very low result indeed!

[usmair]

I was about to get the powertune twin in tank but if the nismo can handle 400kw then I should b ok

Can anyone confirm this? It will b half the price

[Piggaz]

the exhaust is a little restrictive after the front pipe, front pipe is twin 70mm going into at least a 90 or 100mm collector and necking down to 80mm exit. then the decat has a 76mm flange so there is a fair restriction there.

Sort that out! It's all over the place! Its amazing what a well thought out exhaust does for these things... I made more power on less boost on SMALLER turbo's with an exhaust that works!

[jangles]

Sort that out! It's all over the place! Its amazing what a well thought out exhaust does for these things... I made more power on less boost on SMALLER turbo's with an exhaust that works!

i was thinking the same thing earlier,

a decent turbo back exhaust will do wonders.. 3" is small for those huffers.

Edited November 11, 2011 by jangles

[Brezza]

Sort that out! It's all over the place! Its amazing what a well thought out exhaust does for these things... I made more power on less boost on SMALLER turbo's with an exhaust that works!

i was thinking the same thing earlier,

a decent turbo back exhaust will do wonders.. 3" is small for those huffers.

i suppose when you start shoving 24psi of boost through -5's there is a fair amount of air flow!

those restrictions are probably causing the graph to table top.

the exhaust does sound quite full of air when at WOT.

at least now we know that 3in will flow 350rwkw but at slightly higher boost.