Replace 460LPH Walbro with?

[No Crust Racing]

@Dose Pipe Sutututu can confirm, plenty other cars doing more power on standard filter. I'm not opposed to changing it, but when others don't need to, it makes me question it. I am happy to put a new one in there either way as it's been a while on 85.

[Kinkstaah]

The easiest way is to do a run without the filter. This is how I tested it when I was on the dyno.

Prior to that, I changed injectors, fuel pump, and FPR, so you can do all of that too and then change the filter if you would prefer to burn money
It took a FPR gauge on the dyno to actually determine why it was leaning out, which lead to me dropping the filter.

It seems 34 specific though, I do wonder if it is the same part for the Ryco filter or whether 34's have another restriction in the system somewhere that 33's and 32's don't. Is it the same? I have honestly never looked.

The other option is just make 360kw on -9's which is certainly enough for those turbos.

 

[No Crust Racing]

Ideally just want to make one trip back. Not go in, test without filter, no success, come home, buy more shit etc. 

The workshop is small so cars cannot sit there waiting for parts and given it's a 2wd dyno means front drive shaft out each time. 

Thanks for the input, seems the earls and similar are cheap enough anyway. 

[Anfanee]

14 minutes ago, Kinkstaah said:

I don't think it's the case of the filter being clogged so much, as much as what GTSBoy said, the actual filter itself is restrictive and it can't flow that much fuel in it.

This^^

Dan think of it like an exhaust, you can run 350kw through a 3" exhaust but you are not doing yourself any favours. Just bin it and put a good filter in and never worry about it again. 

[No Crust Racing]

$34 for aeroflow push in filter, easy enough. 

[Anfanee]

Just make sure it flows enough for you, i went bigger for headroom. 

[No Crust Racing]

My aeroflow guy is coming back to me with a part number/specs.

[No Crust Racing]

He's suggesting this and said line size will be a restriction before the filter is. 

https://www.aeroflowperformance.com/fuel-systems-efi-accessories/fuel-filters/inline-filters/af610-05blk

[Anfanee]

yeah mate go on his recommendation. 

[Roy]

Arent std efi filters 10micron. Hell my fuel pick up is 15micron!

 

Not sure I would chase better flow thru less filtration. I ended up going twin bosch OE 10micron filters that have M14 female threads. At the end of the day if you want filtration and flow its a matter of surface area...also with E85 and cheap filters you may just want to monitor it that they dont collapse due to any  resin/glue bonding they may use in the filter element letting go in an E85 application. Part of the reason I went OE Bosch as there is loads of experience with E85. Ryco etc is probably fine but finnily enough I see oil pressure differences when going from Ryco oil filter to OE Nisan oil filter so I guess there is something in them

[No Crust Racing]

Thanks Roy, see how we go. In talking with my fittings guy, he was confident these are a "good" filter and have seen good power on e85 cars. 

 

[No Crust Racing]

So, I think this may also be a problem also? 

While removing crap form the car to get into the tank again, I had a light bulb moment and checked the wiring I used for the pump vs the Walbro specs. 

The roll of wire was bought from Jaycar when questioned what I'd need for a fuel pump etc. 

As you can see on the specs @ 13.5volts, this pump wants more than the 15amp rating of the wiring. I assume this would mean the pump is not able to draw the current it needs? or does it simply draw the current and slowly burn out the wiring? 

Walbor specs here: http://walbrofuelpumps.com/walbro-f90000267-fuel-pump-e85

[Dose Pipe Sutututu]

A bit thin, theoretic max current on 16ga is 22amps.

I run 12ga because I had it lying around from my subwoofer wiring about a decade ago when I chased dBs instead of kWs 

[No Crust Racing]

I'm not elec savvy enough to know what happens. D

Does it cause more resistance in the circuit and stop it drawing the amps it needs or does it just burn through the wiring (but not stop the pump flowing hard). 

Either way I'll replace it. 

[Dose Pipe Sutututu]

How long is the run? Because there will be a significant voltage drop if it's 16GA from the engine bay to the fuel pump.

Small wire, higher resistance, more heat, energy loss during transmission (well not lost, it's converted into heat - laws of conservation of energy).

[No Crust Racing]

Direct feed from battery in boot (GTR) so short runs from batter to relay, then short run from relay to pump. 

[burn4005]

thinner wire has a higher resistance, meaning a greater voltage drop over its length. the power loss in that drop in voltage gets dissipated as heat in the wire.

I'd be using 12-14 AWG wire, if its a short run 14 is ok, if its long use 12. 

A 460 at 75+psi & 14v is up around ~20 amps of current.

also of note, the bulkhead pipes in the R34 fuel tank hat are plastic and appear to be a bit thinner than the R32-33 hat. might be an optical illusion, but they look a bit smaller to my eye.

Edited June 7, 2017 by burn4005

[No Crust Racing]

12 it is. Thoguh my auto elec mate got up me for using "awg" apparently that's yank spec and I should be talking metric instead 0_0

[burn4005]

haha 3-3.5ish mm^2 then.

 

(well.. 3.31.)

Edited June 7, 2017 by burn4005

[Dose Pipe Sutututu]

People have drilled out R34/S15 tank hats before as they might be restrictive.

Or, if sizing permits, use a R33/S14 tank hats.