Relocate fuel pump.
Relocate fuel pump.
Author
Discussion

MadMacMcMad

Original Poster:

1,267 posts

283 months

Wednesday 17th October 2007
quotequote all
I have a motor sport fuel pump upgrade, but as is commonly known it is bloody noisy. It doesn't help that it's enclosed in it's own little amplifier (rear wing). This makes it very noisy in the cabin and I am now bored with it.
Cooling is also an issue as it gets even louder when hot.
So I am going to re-locate under the clam somewhere.
Has anybody already done this? If so where did you put it and have you got any pictures?
This will give me the opportunity to run the pipework using decent fittings and not just bending the flex as it is as standard.

Thanks Andy

gadgeroonie

5,362 posts

265 months

Wednesday 17th October 2007
quotequote all
some race cars run 2 fuel pumps

Put the old one back in its place and then use it to feed the new pump - you could even put it under the front clam if your fuel lines were long enough !

you can run quite a lot of fuel pressure, some wrc cars run over 100 psi

the second pump takes the strain off the first pump and is fed with pressurised fuel so it doesn't have to work so hard !

ajg31

1,455 posts

236 months

Wednesday 17th October 2007
quotequote all
gadgeroonie said:
some race cars run 2 fuel pumps

Put the old one back in its place and then use it to feed the new pump - you could even put it under the front clam if your fuel lines were long enough !

you can run quite a lot of fuel pressure, some wrc cars run over 100 psi

the second pump takes the strain off the first pump and is fed with pressurised fuel so it doesn't have to work so hard !
Why run a motorsport pump at all? Put the original back on and check the fueling. It seems to be that the upgraded wiring to the pump is a sufficient mod without the extra pumping power

MadMacMcMad

Original Poster:

1,267 posts

283 months

Wednesday 17th October 2007
quotequote all
ajg, that's very interesting.
Does anyone else have an opion with this. I do have the Roush exhaust and am given to believe that the upgraded pump is necessary to maintain needed pressure.
I am developing over 380horse, so is that in geopardy if I swap back?

humpy

1,171 posts

248 months

Wednesday 17th October 2007
quotequote all
Use the M400 pump instead - it's quieter and good for cars up to 400bhp (oddly enough) smile

ajg31

1,455 posts

236 months

Wednesday 17th October 2007
quotequote all
MadMacMcMad said:
ajg, that's very interesting.
Does anyone else have an opion with this. I do have the Roush exhaust and am given to believe that the upgraded pump is necessary to maintain needed pressure.
I am developing over 380horse, so is that in geopardy if I swap back?
I am sure there ahve been a few cars that have been mapped at high BHP without the upgraded pump. Agree that the M400 one is gonna be well up for the job of handling 380 tho smile I know with my Fiat Coupe it was aloways thought a motorsport pump was required, when in reality all they needed was a good 13-14v supply from the battery.

joust

14,622 posts

288 months

Thursday 18th October 2007
quotequote all
humpy said:
Use the M400 pump instead - it's quieter and good for cars up to 400bhp (oddly enough) smile
Err. My M400 ran 409bhp without the Roush exhaust....

If noise is the issue, then change it's position (turn it's angle) and insulate it.

J

humpy

1,171 posts

248 months

Thursday 18th October 2007
quotequote all
joust said:
humpy said:
Use the M400 pump instead - it's quieter and good for cars up to 400bhp (oddly enough) smile
Err. My M400 ran 409bhp without the Roush exhaust....
A fair point. I don't know the actual output the pump is rated for - it may be more than 400bhp. What I should have said is; if the M400 pump is sufficient for the standard car (as I havn't seen anything to suggest otherwise) then it should also be for a car with less power at 380bhp.

As you say, perhaps worth trying to angle it and insulate before shelling out for a new pump.

MadMacMcMad

Original Poster:

1,267 posts

283 months

Thursday 18th October 2007
quotequote all
Cheers guys.
I think I have a go at putting it under the clam somewhere first.

NickyTwoHats

2,093 posts

270 months

Thursday 18th October 2007
quotequote all
It may have been fitted upside-down. Try tsking it off and simply changing its attitude while the engine is running - you may have a very pleasant surprise.