Can I run fuel pumps mounted vertically?

**Gabe** · 01-01-2008, 07:52 PM

I have a Bosch 044 high pressure pump, and a low pressure lift pump that I want to mount vertically instead of horizontally.

Any problem with doing this?
Is the reliablility of the pumps comprimised at all?

**30psi 4agte** · 01-01-2008, 08:09 PM

No prob at all...

As long as the big pumps have their fuel supply gravity feed youl be sweet.

The 044 pumps (most efi pumps ) cant draw fuel properly or at all and must be fed by gravity

**love ke70** · 01-01-2008, 08:13 PM

isnt that what the low pressure lift pump is for 30psi?

**30psi 4agte** · 01-01-2008, 08:19 PM

Originally Posted by love ke70

isnt that what the low pressure lift pump is for 30psi?

Yep..

BUT i wasnt sure if he was going / meaning to mount the 044 pump verticaly above the surge tank and therfore having issues

You can actualy do it....Mount the pump higher than its supply but........ as a general rule you cant -- because it doesnt always work

FWIW I run a vl turbo EFI pump as a lift pump and have it mounted verticaly slightly above the it supply at the bottom of the tank..

**Gabe** · 01-01-2008, 09:18 PM

Awesome cheers for that.
The way I've got things, everything will be under the tank, so the surge tank and pumps shouldn't de-prime..

Cheers again!

**The Real Roadrunner** · 02-01-2008, 05:03 PM

just made sure the inlet is at the bottom as the bosch pumps will cavitate hard if air gets inside them. the inlet is the M18x1.5 fitting on the back of the pump.

your actually better off mounting 044s on an angle or vertically as it decreases how noisey the pump is (still havn't figured out why)

cheers
linden