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  • 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.

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