Jump to content
SAU Community

Recommended Posts

  • 11 months later...

Ok

 

I'm about to re configure my fuel system with a walbro gss342 255lph pump intank to a 4 to 6L surge tank fitted with a walbro 460 e85 pump. 

Will only every run pump 98 as car doesn't get used often.  

From what i have worked out from the walbro gss342 255lph pump graph at free flow it should be pumping around 75 to 80gph. For a lift pump only set-up. 

Is this correct. 

I'm sure the 460 e85 pump will support 22 to 24psi of boost on a gtx3582r on a 2530 neo engine on p98 Just have to make sure lift pump can keep up thats all.

Screenshot_20170810-143444.png

Edited by lcxu105
Autocorrect

The flow graph says you have lots more flow capability with that pump being fed 13.5v.

Going off your sums, those flow numbers say you hit an equilibrium point roughly at targeted max injector flow.  Is there any chance you'll be staying at that point for more than a few seconds at a time?

Run the GSS342 at 13.5v, peace of mind.

No it wont be held at max duty cycle for long as you have said . Pump will have 14.4 volts so will be way more than enough at free flow capacity for lift pump work. Having said that if i ever do decide to get flex fuel tune and larger injectors it will be line ball game i think. But should be ok as i will fit sure tank with a low fuel sender so i know to lift my foot just incase. 

Edited by lcxu105
Autocorrect

Anyone seen or used the new (ish) AEM 380lph inline fuel pump ?

looks to be a direct replacement of the Bosch 044 but flows more everywhere !

http://aemelectronics.com/?q=articles/aem-releases-380lph-high-flow-high-pressure-fuel-pump

  • Like 1
14 hours ago, SiR_RB said:

Anyone seen or used the new (ish) AEM 380lph inline fuel pump ?

looks to be a direct replacement of the Bosch 044 but flows more everywhere !

http://aemelectronics.com/?q=articles/aem-releases-380lph-high-flow-high-pressure-fuel-pump

I haven't used one, but I have one BNIB if you are interested! They are a direct replacement for 044 (why I bought it in the first place, but changed directions).

Not e85 compatible. Well maybe, but not for long haha

On 8/22/2017 at 9:38 PM, SiR_RB said:

Anyone seen or used the new (ish) AEM 380lph inline fuel pump ?

looks to be a direct replacement of the Bosch 044 but flows more everywhere !

http://aemelectronics.com/?q=articles/aem-releases-380lph-high-flow-high-pressure-fuel-pump

Run two of them with E85 and 5 Bar differential fuel pressure with 1800cc injectors (@ 5 Bar) at 90 % duty and they hold 5 Bar differential pressure perfect.

Only dyno work so far so cant comment on longevity but for the price not really a concern.

  • Like 1
4 hours ago, infomotive said:

Run two of them with E85 and 5 Bar differential fuel pressure with 1800cc injectors (@ 5 Bar) at 90 % duty and they hold 5 Bar differential pressure perfect.

Only dyno work so far so cant comment on longevity but for the price not really a concern.

Would you say they are better then the 044 in terms of flow ?

sometimes I don't know weather I should believe all the flow charts manufacturers through out there so would rather hard evidence like urself 

thanks

Be careful not to buy fake pumps. These days it's getting harder to spot a fake one from a real one. Heres some picks of a fake gss342 255lph walbro pump i was sent recently after the seller reassured myself it was genuine before purchasing it and their add guaranteed it was 100%real. Long story short i was lucky enough to get my money back.  Fake pump is in my left hand in photos. 

Screenshot_20170822-151232.png

Screenshot_20170822-151134.png

Screenshot_20170822-151149.png

  • 3 months later...

G'day fellas, a few questions about fuel pumps.

I am currently running about 275rwkw @ PULP with Hypergear ATR43SS2 at 20psi. I am thinking of retuning for E85, aiming for somewhere around 300rwkw. Here's the current fueling setup, it's pretty basic:

  • Walbro 255LPH fuel pump
  • Deatschwerks 800cc injectors
  • Fuel pump rewire

The injectors have been used with E85 previously and I am confident they have enough flow for the task.

Questions:

  1. What's the chances the Walbro 255 would flow enough for E85 at ~300rwkw?
  2. I don't think the Walbro is specifically listed as 'E85 safe' – has anyone run their Walbro 255 with E85 reliably?
  3. If I need to upgrade the fuel pump, what are the in-tank recommendations for this application? The Walbro 460 seems really popular but is it an overkill? Are there any downsides to running an 'oversized' fuel pump?
  4. Ebay is full of pump labelled 'genuine', but how can you really know that it's authentic?

Thanks guys.

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

    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
    • I assume clearances were all a-okay?
    • Shock tower brace is in +5Kw....LOL  
×
×
  • Create New...