R32 Gtr Fuel Pump V Wallbro

[WHITE R32]

the old pump was the original pump that is now 17 years and 180000+km old

my thoughts exactly.... theres nothing at all wrong with walbros... as long as theyre the real walbro and not a ripoff theres no problem at all on a mild-mid street/drag car

as nismoid said dyno it to check the air/fuels or you could be very sorry very quickly

[James_03]

Bosch pumps are not noisy at all when installed correctly, and the performance between the two is not the same. You only really need to put them side by side to see why, but here are some facts all the same:

Below figures are with 13.5v pump supply.

Bosch 044 pump is 330 litres per hour and supports 730 bhp at 73.5 PSI (0 580 254 044)

Walbro 255 "high pressure" is 56 gallons/211 litres per hour at 70 PSI (GSS340)

Speaks for itself. An 044 intank fitting I find is just as easy as the walbro, I have done both.

[dori34]

Bosch pumps are not noisy at all when installed correctly, and the performance between the two is not the same. You only really need to put them side by side to see why, but here are some facts all the same:

Below figures are with 13.5v pump supply.

Bosch 044 pump is 330 litres per hour and supports 730 bhp at 73.5 PSI (0 580 254 044)

Walbro 255 "high pressure" is 56 gallons/211 litres per hour at 70 PSI (GSS340)

Speaks for itself. An 044 intank fitting I find is just as easy as the walbro, I have done both.

Interesting facts there, i was about to get a Walbro but i think it won't be enough for new power output.

What about a Bosch 040 what are the specs of this pump when compared to a Walbro?

[Harey]

Yeah I think people are comparing the noise of an external bosch 044 to an intank walbro which is not fair.

The external bosch 044s are very noisy!

I ran a walbro on my previous commodore with 250rwkw for many years with no issues.

[bodge]

Why not replace the existing pump with a new one, and wire it up so it gets a constant 13.5 volts. This is what has been done to my car and its making well over 300rwkw and was recommended to me by a well known shop here in Melbourne.

[James_03]

Interesting facts there, i was about to get a Walbro but i think it won't be enough for new power output.

What about a Bosch 040 what are the specs of this pump when compared to a Walbro?

If you looking for a bosch in-tank solution, then go the 023. The 023 is pretty much the big brother of the 040 when looking at the in-tank only range. Quite a few people are still running the 044 in-tank but without issues. The 023 comes with an open base and in-built filter, which I find makes installing easier. Of course the 700bhp of the 044 is probably going to be overkill for most, but to me having the extra rail pressure there is not such a bad thing on a turbo car.

But as others have mentioned if your still set on the walbro, then make sure you get the high pressure GSS340, and do the re-wire for direct with a relay trigger.

Edited March 23, 2010 by James_03