The Fuel Pump Thread

[sneakey pete]

-10 lines return to the tank I could understand, but -10 to the rail seems way overkill, in my opinion.

[Piggaz]

Maybe so and I agree. But you will NEVER have to touch the fuel system again. 

Thats what the tuner wanted, that's what he got.

[Dose Pipe Sutututu]

Not is overkill

 

 

 

[lcxu105]

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.

Edited August 10, 2017 by lcxu105
Autocorrect

[lcxu105]

75gph is just over 283lph or just over 4.7L per minute. 

[lcxu105]

Running 1000cc injectors so at 80% duty cycle 800cc x 6 is 4.8L per minute. 

I'm thinking it will be apot on and support the fuel supply required but i wanted other people's knowledge and input.

[Dale FZ1]

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.

[lcxu105]

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 August 18, 2017 by lcxu105
Autocorrect

[SiR_RB]

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

[GD51LA]

i got one 460 feeding three staged 460's
dash 10 feed dash 8 return

[WantGTR]

9 hours ago, GD51LA said:

i got one 460 feeding three staged 460's
dash 10 feed dash 8 return








 

wow. that is a serious setup. 4 pumps -10 feed, how many engines are you powering?

[MagicMikeZ32]

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

[GD51LA]

wow. that is a serious setup. 4 pumps -10 feed, how many engines are you powering?

lol

4 figures need 3 pumps[emoji12]

[Piggaz]

-10 lines FTW!

[sneakey pete]

Meanwhile i'm just here using my -6 lines

[infomotive]

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.

[SiR_RB]

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

[SiR_RB]

And where did u purchase them from ?

[lcxu105]

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. 

[V28VX37]

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.