The Fuel Pump Thread

[GTSBoy]

1. No, I don't think the 255 would be a good idea for E85 at that power level.

2. The newer ones are safe.  The 255 isn't really big enough anyway, so the question is moot.

3. Yup.  Reasonable choice.  Downsides of a truly oversized pump are excessive heating of the fuel.  The 460 isn't really all that oversized.  If you were unlucky enough to experience any problems from hot fuel, you could plumb in a fuel cooler in the return, or invest in a voltage controller.

4. Don't buy from ebay.  Buy from someone off here who you trust.  Such as Scotty.

[Unkn0wn]

Just now, GTSBoy said:

1. No, I don't think the 255 would be a good idea for E85 at that power level.

2. The newer ones are safe.  The 255 isn't really big enough anyway, so the question is moot.

3. Yup.  Reasonable choice.  Downsides of a truly oversized pump are excessive heating of the fuel.  The 460 isn't really all that oversized.  If you were unlucky enough to experience any problems from hot fuel, you could plumb in a fuel cooler in the return, or invest in a voltage controller.

4. Don't buy from ebay.  Buy from someone off here who you trust.  Such as Scotty.

X2 agree with all points made by GTSBOY..

Those 460's are power hungry, so make sure you run appropriate wiring to them, they will eat 20amp... if its in tank remove the electrical fittings and fit post type terminals to cope with the higher power demand.

[V28VX37]

10 minutes ago, Unkn0wn said:

X2 agree with all points made by GTSBOY..

Those 460's are power hungry, so make sure you run appropriate wiring to them, they will eat 20amp... if its in tank remove the electrical fittings and fit post type terminals to cope with the higher power demand.

Awesome thanks guys, great input!

A new pump it is then. Are there any other options besides the Walbro 460LPH you might recommend? I had a quick look but couldn't work out if Bosch makes an in-tank one.

[admS15]

I run a dw340 in mine, is fine for 310rwkw and has been going for around 18 months without issue. Good if your worried about current draw or fuel heating. Bad side is they are pricey for what they are and you could probably get a walbro 460 cheaper. I managed to get my dw cheap which is why it was an easy decision for me.

The walbro 255 will handle e85 although not recommended but isn't big enough for the task. Scotty has been running a pair on his vq25 stagea for years now.

Does this mean you're now keeping your car?

[GTSBoy]

Various other options, like Deatschtschtschshwerks, but generally all about same same in terms of capabilities vs money, with Walbro stuff being ahead in the value stakes.

[Dose Pipe Sutututu]

2 hours ago, GTSBoy said:

4. Don't buy from ebay.  Buy from someone off here who you trust.  Such as Scotty.

Or from Kudos Motorsports (Skyline Specialist) or from EFI Solutions aka TAARKS (Nissan Silvia specialist but has shit tons of OEM Skyline parts too).

Both Australian, both are awesome to deal with.

[V28VX37]

2 hours ago, admS15 said:

I run a dw340 in mine, is fine for 310rwkw and has been going for around 18 months without issue. Good if your worried about current draw or fuel heating. Bad side is they are pricey for what they are and you could probably get a walbro 460 cheaper. I managed to get my dw cheap which is why it was an easy decision for me.

The walbro 255 will handle e85 although not recommended but isn't big enough for the task. Scotty has been running a pair on his vq25 stagea for years now.

Does this mean you're now keeping your car?

Thanks mate! Yeah looking at the prices the DW is probably ~$100 more than the Walbro 460. I'll probably rewire again with large gauge cable so current should be ok, however the fuel heating is of potential concern - does that happen when a high capacity pump is running at just a fraction of its capacity (ie. recirculating back into fuel tank)?

Re keeping the car, there are no takers at the moment so I'm thinking 'just one more mod' - famous last words haha. Plus maybe it'll sell better at 300+rwkw? 

[V28VX37]

58 minutes ago, Dose Pipe Sutututu said:

Or from Kudos Motorsports (Skyline Specialist) or from EFI Solutions aka TAARKS (Nissan Silvia specialist but has shit tons of OEM Skyline parts too).

Both Australian, both are awesome to deal with.

Cheers Johnny, I've ordered heaps from Kudos over the years and definitely agree.

Looks like they are listing the original F9000267: http://www.kudosmotorsports.com/catalog/fuel-pump-tank-walbro-f9000267-450ltrhr-compatible-nissan-200sx-skyline-gts25-25gt-p-1218.html

Whereas EFI have the successor F90000274: https://www.efisolutions.com.au/walbro-450-l-hr-fuel-pump-kit-s14-s15-r33

I'm guessing the F90000274 is the pick since it's newer technology?

3 hours ago, Unkn0wn said:

...

Those 460's are power hungry, so make sure you run appropriate wiring to them, they will eat 20amp... if its in tank remove the electrical fittings and fit post type terminals to cope with the higher power demand.

Thanks! Yeah the wiring in the Walbro pics looks positively skinny - are you suggesting cutting it at/close to the pump and running larger gauge inside the fuel tank also?

[admS15]

Thanks mate! Yeah looking at the prices the DW is probably ~$100 more than the Walbro 460. I'll probably rewire again with large gauge cable so current should be ok, however the fuel heating is of potential concern - does that happen when a high capacity pump is running at just a fraction of its capacity (ie. recirculating back into fuel tank)?
Re keeping the car, there are no takers at the moment so I'm thinking 'just one more mod' - famous last words haha. Plus maybe it'll sell better at 300+rwkw? 

Yep, one more mod. E85, 300rwkw will help sell, increase value of the car, i am guilty of telling those things to my wife too[emoji6].

The truth is, a stockish car at a low price is the easiest to sell.

Good to hear you're keeping and going to enjoy it a while longer[emoji106]

So are you thinking flexfuel? I would strongly recommend it for the added flexibility and never having to worry about not being able to get fuel.

Sent from my A1601 using SAU Community mobile app

[GTSBoy]

48 minutes ago, V28VX37 said:

 are you suggesting cutting it at/close to the pump and running larger gauge inside the fuel tank also?

The suggestion is to put new passthrough terminals onto the tank lid so as not to try to pass 1 bazzilion amps through the original ones.  And then, yes, fat wires both sides.

[V28VX37]

Yep, one more mod. E85, 300rwkw will help sell, increase value of the car, i am guilty of telling those things to my wife too[emoji6].

The truth is, a stockish car at a low price is the easiest to sell.

Good to hear you're keeping and going to enjoy it a while longer[emoji106]

So are you thinking flexfuel? I would strongly recommend it for the added flexibility and never having to worry about not being able to get fuel.

Sent from my A1601 using SAU Community mobile app

Lol, yes. The stories we tell ourselves.

Re flex that'd be awesome but a lot pricier with pretty much double the tuning time. I won't need the range so should be right with e85 only (famous last words).

[admS15]

Lol, yes. The stories we tell ourselves.

Re flex that'd be awesome but a lot pricier with pretty much double the tuning time. I won't need the range so should be right with e85 only (famous last words).

Aren't you already running nistune? Just get the latest feature pack with flex option, add sensor and then tune for e85. Your maps for 98 are already there. Your additional cost will be the feature pack and sensor, sensor should be under 200, not sure on feature pack. Dosepipe could probably quote you for those. Just thinking out loud.

Dedicated E85 wouldn't be too bad anyways. If you go that way, make sure you save your 98 maps, so you can switch back if needed/required.

[V28VX37]

Yep, one more mod. E85, 300rwkw will help sell, increase value of the car, i am guilty of telling those things to my wife too[emoji6].

The truth is, a stockish car at a low price is the easiest to sell.

Good to hear you're keeping and going to enjoy it a while longer[emoji106]

So are you thinking flexfuel? I would strongly recommend it for the added flexibility and never having to worry about not being able to get fuel.

Sent from my A1601 using SAU Community mobile app

Lol, yes. The stories we tell ourselves.

Re flex that'd be awesome but a lot pricier with pretty much double the tuning time. I won't need the range so should be right with e85 only (famous last words).

[Dose Pipe Sutututu]

You can import your current map back on. That means you only need to sort out the E85 compensation tables. Pretty much need to tune (or lazily blanket values) for the cranking, timing and fuel tables. 

Lazy tuning, add 4 degrees into the entire timing compensation table, of course a dyno would be best for these things lol

[Adz2332]

Bumping a thread.....

Im setting up my fuel set up for my track car.

Will go Fuel cell, external fuel pump, surge tank, twin fuel pumps

Its for a LS1 at around 375kws.

I want the fuel pumps to be able to accept am8 fittings as thats what i run.

any ideas?

Thanks

[robbo_rb180]

Why not use something like this?
http://www.radiumauto.com/FCST-Fuel-Cell-Surge-Tank-P1497.aspx
small high volume low pressure lift pump and 2x 400/425/460lph TI or bosch 39/40mm pumps be plenty

OR
2x this would work with an adaptor fitting
https://www.prospeedracing.com.au/AEM-400LPH-Metric-Inline-High-Flow-Fuel-Pump-50-1009

Edited May 30, 2023 by robbo_rb180

[Adz2332]

Silly question, does the pump from the cell to the surge tank have to be as big? Smaller? Same size? Etc

[GTSBoy]

Pump to the surge has to be able to replace what the engine can use. The main pressure pump has to do a fair bit more than that and maintain high pressure. The lift pump only has to do the smaller amount and without much pressure. Makes it a much smaller power draw, even if the delivery is, say 75% or so of the main.

Of course, if the surge tank is large relative to how much the engine can pull our of it, and you do not have long periods on power, then you can go even smaller with the lift pump.

But in general, it will only be a little smaller than the main pump.

[Adz2332]

Thank you

So if I go the twin aem pumps from the 2.5l surge, one will be plenty for cell to surge?

[GTSBoy]

Look at the flow vs pressure curves. If you use the same pump type, it will be flowing unloaded and will move the maximum amount of juice it can.