Jump to content
SAU Community

Recommended Posts

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,

Link to comment
https://www.sau.com.au/forums/topic/350161-twin-intank-pumps-for-a-gtr/
Share on other sites

  • Replies 61
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

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.

^^^ 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.. :domokun:

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.. :domokun:

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.

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.. :domokun:

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,

  • 9 months later...

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.

post-63525-0-34465400-1320894136_thumb.jpg

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.

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??

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?

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.

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!

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 by 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.

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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Next on the to-do list was an oil and filter change. Nothing exciting to add here except the oil filter is in a really stupid place (facing the engine mount/subframe/steering rack). GReddy do a relocation kit which puts it towards the gearbox, I would have preferred towards the front but there's obviously a lot more stuff there. Something I'll have to look at for the next service perhaps. First time using Valvoline oil, although I can't see it being any different to most other brands Nice... The oil filter location... At least the subframe wont rust any time soon I picked up a genuine fuel filter, this is part of the fuel pump assembly inside the fuel tank. Access can be found underneath the rear seat, you'll see this triangular cover Remove the 3x plastic 10mm nuts and lift the cover up, pushing the rubber grommet through The yellow fuel line clips push out in opposite directions, remove these completely. The two moulded fuel lines can now pull upwards to disconnect, along with the wire electrical plug. There's 8x 8mm bolts that secure the black retaining ring. The fuel pump assembly is now ready to lift out. Be mindful of the fuel hose on the side, the hose clamp on mine was catching the hose preventing it from lifting up The fuel pump/filter has an upper and lower section held on by 4 pressure clips. These did take a little bit of force, it sounded like the plastic tabs were going to break but they didn't (don't worry!) The lower section helps mount the fuel pump, there's a circular rubber gasket/grommet/seal thing on the bottom where the sock is. Undo the hose clip on the short fuel hose on the side to disconnect it from the 3 way distribution pipe to be able to lift the upper half away. Don't forget to unplug the fuel pump too! There's a few rubber O rings that will need transferring to the new filter housing, I show these in the video at the bottom of this write up. Reassembly is the reverse Here's a photo of the new filter installed, you'll be able to see where the tabs are more clearing against the yellow OEM plastic Once the assembly is re-installed, I turned the engine over a few times to help build up fuel pressure. I did panic when the car stopped turning over but I could hear the fuel pump making a noise. It eventually started and has been fine since. Found my 'lucky' coin underneath the rear seat too The Youtube video can be seen here: https://www.youtube.com/watch?v=uLJ65pmQt44&t=6s
    • It was picked up on the MOT/Inspection that the offside front wheel bearing had excessive play along with the ball joint. It made sense to do both sides so I sourced a pair of spare IS200 hubs to do the swap. Unfortunately I don't have any photos of the strip down but here's a quick run down. On the back of the hub is a large circular dust cover, using a flat head screw driver and a mallet I prised it off. Underneath will reveal a 32mm hub nut (impact gun recommended). With the hub nut removed the ABS ring can be removed (I ended up using a magnetic pick up tool to help). Next up is to remove the stub axle, this was a little trickier due to limited tools. I tried a 3 leg puller but the gap between the hub and stub axle wasn't enough for the legs to get in and under. Next option was a lump hammer and someone pulling the stub axle at the same time. After a few heavy hits it released. The lower bearing race had seized itself onto the stub axle, which was fine because I was replacing them anyway. With the upper bearing race removed and the grease cleaned off they looked like this The left one looked pristine inside but gave us the most trouble. The right one had some surface rust but came apart in a single hit, figure that out?! I got a local garage to press the new wheel bearings in, reassemble was the opposite and didn't take long at all. Removing the hub itself was simple. Starting with removing the brake caliper, 2x 14mm bolts for the caliper slider and 2x 19mm? for the carrier > hub bolts. I used a cable tie to secure the caliper to the upper arm so it was out of the way, there's a 10mm bolt securing the ABS sensor on. With the brake disc removed from the hub next are the three castle nuts for the upper and lower ball joints and track rod end. Two of these had their own R clip and one split pin. A few hits with the hammer and they're released (I left the castle nuts on by a couple of turns), the track rod ends gave me the most grief and I may have nipped the boots (oops). Fitting is the reversal and is very quick and easy to do. The lower ball joints are held onto the hub by 2x 17mm bolts. The castle nut did increase in socket size to 22mm from memory (this may vary from supplier) The two front tyres weren't in great condition, so I had those replaced with some budget tyres for the time being. I'll be replacing the wheels and tyres in the future, this was to get me on the road without the worry of the police hassling me.
    • Yep, the closest base tune available was for the GTT, I went with that and made all the logical changes I could find to convert it to Naturally Aspirated. It will rev fine in Neutral to redline but it will be cutting nearly 50% fuel the whole way.  If I let it tune the fuel map to start with that much less fuel it wont run right and has a hard time applying corrections.  These 50% cuts are with a fuel map already about half of what the GTT tune had.  I was having a whole lot of bogging when applying any throttle but seem to have fixed that for no load situations with very aggressive transient throttle settings. I made the corrections to my injectors with data I found for them online, FBCJC100 flowing 306cc.  I'll have to look to see if I can find the Cam section. I have the Bosch 4.9 from Haltech. My manifold pressure when watching it live is always in -5.9 psi/inHg
    • Hi My Tokico BM50 Brake master cylinder has a leak from the hole between the two outlets (M10x1) for brake pipes, I have attached a photo. Can anyone tell me what that hole is and what has failed to allow brake fluid to escape from it, I have looked on line and asked questions on UK forums but can not find the answer, if anyone can enlighten me I would be most grateful.
    • It will be a software setting. I don't believe many on here ever used AEM. And they're now a discontinued product,that's really hard to find any easy answers on. If it were Link or Haltech, someone would be able to just send you a ECU file though.
×
×
  • Create New...