Facet Red Top Fuel Pump

[edbar 6]

Just bought a red top fuel pump to solve a few issues im having at the moment. Just wondering where you guys mount yours? no room in the engine bay or that I'd be happy with it there.

Any help or ideas appreciated as always.

Edd

[swordfish210 20]

Most of them i've seen have been mounted on the inner wing in the engine bay.

[edbar 6]

Looked at that but with the mounting rubber blocks and 90degree unions think its too tall? Any pics?

Thanks

edd

[swordfish210 20]

Nah can't seem to fine one, Use smaller rubber blocks?

[edbar 6]

Could do but would be nice to use the kit. Was thinking about having it inside the car in the back?

[stuart 31 3 Cars]

I've got mine mounted on the coil bracket on the n/s inner wing, seems to fit quite well, if you don't have a coil mounted there.

My fuel pipe comes through the bulkhead just above where it meets the chassis leg by the way.

[GilesW 41]

Make sure you mount them properly - horizontal with the filter at the bottom.

 

Also IIRC they only pull a meter head (or less?) So inner wing/engine bay maybe at the limit of that.

I personally always mount as near to the tank as possible, ie boot area. But then I do run a full swirl pot system.

[stuart 31 3 Cars]

Make sure you mount them properly - horizontal with the filter at the bottom.

 

Also IIRC they only pull a meter head (or less?) So inner wing/engine bay maybe at the limit of that.

I personally always mount as near to the tank as possible, ie boot area. But then I do run a full swirl pot system.

 

Hmm, might have to revise my method then... it's bolted solidly to the bracket and mounted vertically, didn't actually realise they had a filter in them

Saying that though it's been on my car all season, done 5 rallies and probably 1000 miles on the road and it's still working fine.

[edbar 6]

If it aint broke an all that.... Think im going to mount it on the o/s inner wing, bonnet does clear the unions. just got to get it working now.

[GilesW 41]

I'm not sure of the "if it ain't broke..." idea.

 

How about: "if it ain't right...." lol.

 

Seriously thought it's not the end of teh world mounting it differently, but the reason behind my points are:

 

1) These Facet pumps have a basket filter in them (undo the bottom of the main cylinder and out comes the filter).

These filters work properly when mounted on a horizontal plain and at the bottom.

If you don't have any filter before the facet, and therefore the facet filter is 'your filter' then you shoul;d really mount it right to stop crude going through the filter & fuel system

 

2) Facet fuel pumps do exactly that - they pump (fuel forward) - NOT suck.

Well, kind of. They do suck (and facets are better than many and sucking), but are far more efficient at pumping.

I think in the box there is the pump spec and it gives the max design head.

Say if it is 1 meter, then take it as roughly 1 meter up veritcal from directly above the tank.

Move the pump away from the tank and the further away it is the lower the vertical height should get. Therefore in the engine bay it the head should be a lot lower than the 1 meter.

 

3) Facet pumps (like fuel injection pumps) dont like to be run dry. When they do they seriously shorten the life of the pump.

Therefore if you don't have a none return valve in teh feed line to teh facet then every time you start your car it is very likely it will be running dry for a little while before it gets fuel through.

Not a massive issue if the pump is local to the tank, but the further away it gets (potenially) the longer it sucks dry.

 

 

Again - none of the above are probably real life threatening issues on mostly road going cars (you might replace the facet more often, get dirt in your lines etc), but if you race, do track days, or rally than I personnally I would want to be getting it right to minimise spoiling a good day out.

[tri_longer 25]

I believe if you are looking for a sucker rather than a blower then the Holley fuel pumps are the ones to look for.

 

My mate went through two red tops the hard way after having them mounted in the engine bay.

Edited January 19, 2011 by tri_longer

[edbar 6]

In the demon tweeks catalogue it says red tops can be mounted front or rear, and being mounted on the inner wing isnt going to be over a meter above the tank even at the bottom so I think that wouldnt be an issue, also the way I have it mounted is horizontal with the filter angled downward.

Doesnt the ms state pumps have to be in enclosed boxes now if inside the vehicle?

[GilesW 41]

edbar - I'll clarify what I said earlier:

 

*if* the facet can pull a head of 1 meter (which I'm not sure it's even that), then that 1m pull DECREASES the further away from the tank you get.

 

ie if you mount the pump 1 MILE away from the tank but it's only 1mm above the tank level it's going to have a real hard life.

 

 

Anybody on here who knows about fluid dynamics maybe able to tell us the maths (if they, or indeed us are at all interested).

 

Again - I'm not saying you are facing a big issue, but just trying to advise what is the 'right' way.

[edbar 6]

edbar - I'll clarify what I said earlier:

 

*if* the facet can pull a head of 1 meter (which I'm not sure it's even that), then that 1m pull DECREASES the further away from the tank you get.

 

ie if you mount the pump 1 MILE away from the tank but it's only 1mm above the tank level it's going to have a real hard life.

 

 

Anybody on here who knows about fluid dynamics maybe able to tell us the maths (if they, or indeed us are at all interested).

 

Again - I'm not saying you are facing a big issue, but just trying to advise what is the 'right' way.

 

Think that thats pretty obvious, I was saying that I dont think the red top would struggle on the wing. I have however decided to mount the pump in the back as I do need it to work as efficiently as possible and the closer to the tank the better which I think is what we are all pointing out.

So to get back on topic in the rear where do people mount theirs?