DK

Has anyone upgraded the in-tank fuel pump on the a4 1.8t quattro? Can you access the fuel pump from the trunk or do you have to remove the entire fuel tank?

As an alternative, could you use an in-line fuel pump in conjunction with the oem in-tank pump?

Any suggestions would be greatly appreciated.

Thanks
DK

BOOSTD

on the A4s, (DBW at least) the fuel pump flows 110 liters/hour, which should be plenty.

1 slow Audi

Wich should be plenty for what? 110LPM is good for stock but if you wana run more power stock doesnt cut it.stock is good for about 250 hp anything after that the pump should be changed.(i know people have run more power on stock pump but thats a ticking time bomb)240LPM is a good upgrade and yes you can run a in line pump like bosh and it will work just fine.

BOOSTD

I say it's fine because I'm running APR stage 3 and I know DK is too (he may even be 3+), and the stock pump flows plenty of fuel for it; there's actually room for more fuel flow if the kit needed it, which it doesn't.

The pump on the GTI 1.8Ts however use a pump that only flows somewhere in the neighborhood of 90 and because of that APR includes a larger pump with the transverse stage 3.

xr4tic

That's only 110lph free-flow, it will flow a lot less at 90psi.

xr4tic

The Bentley manual doesn't say anything about removing the tank, just "Remove connector flange cover under luggage compartment trim"
So it looks like you can pull it out of the trunk area, you just have to make sure you don't drip any fuel.

DK

Plenty of aftermarket choices for the supra TT fuel pump (rated at 255 lph) at very good prices.

DK

xr4tic

that in tests flow ~290lph @ 0psi and ~100lph @ 90psi using 12V and ~320lph @ 0psi and ~145lph @ 90psi using 13.5V I doubt it's a bolt-in though.

The Supra TT pump flows even more. I know of one person who has done it, but I was told it took some severe modifications do do it.

An external pump is another possibility, but it will require some fuel line work, and will probably be louder (more buzzy)