MAJOR FUEL ISSUES 25det neo r32

[Murray_Calavera]

7 hours ago, GTSBoy said:

I can hoon my R32 around - hard launches, high lateral Gs - with <<1/4 tank without any such shenanigans. This with the previous 040 and the current GSS342.

He has an aftermarket hanger, it just sounds like your setup is much better then his. 

It doesn't sound crazy at all to me, to install an aftermarket hanger and end up backwards compared to the factory setup. 

Have a look at the tiny sock/filter/pickup on his fuel pump, surely the factory item is much much longer and I bet, better positioned as well. 

[GTSBoy]

10 hours ago, Murray_Calavera said:

He has an aftermarket hanger, it just sounds like your setup is much better then his. 

It doesn't sound crazy at all to me, to install an aftermarket hanger and end up backwards compared to the factory setup. 

Have a look at the tiny sock/filter/pickup on his fuel pump, surely the factory item is much much longer and I bet, better positioned as well. 

Yeah, I still dunno. The size of the sock should only matter if it is blocked. It is, after all, a filter rather than a "thing to encourage fuel pickup".

He has modded the original so that it is now down on the floor, so it's not physically the same as in the original complaint, yet does the same thing. I therefore lean to the problem being somewhere else.

Sticking some dynomat on there is a worthwhile experiment, but I'd put $10 on it not fixing the problem.

[Murray_Calavera]

49 minutes ago, GTSBoy said:

It is, after all, a filter rather than a "thing to encourage fuel pickup".

I'm only really familiar with the R33 setup, the factory filter is very much an encourage fuel pick up thingo. 

The factory pump sits about half way down into the tank and the sock runs down into the bottom of the tank. 

Mounting an aftermarket pump in the factory location with the typical tiny Walbro filter, I had huge fuel surge issues once the fuel level dropped below 50%. 

[GTSBoy]

This is the R32 one

and the inside of the tank should look like this.

which has an internal swirl pot, that the return line must empty into. (Interestingly, because the GTR tank is plastic it misses out on the swirl pot.)

That is a potential cause for an aftermarket pump hanger to mess things up. Maybe the return is cut short and squirting over the side.

[Murray_Calavera]

17 minutes ago, GTSBoy said:

That is a potential cause for an aftermarket pump hanger to mess things up. Maybe the return is cut short and squirting over the side.

Yeah sounds like the swirl pot isn't being fed from the return line, would be made even worse by the high flow pump.