v8 fuel pump preasure

ButterFingers

Active Member
hi,
My fuel pump is leaking a bit and I may need to replace it , what is the pressure needed to pump to the carburetors .
Any recommendations for a good brand and from whom , lots on ebay etc but in choosing one I need more information.
Peter
 
Huco 133010 iirc... You need a puller pump if you are going to have it at the front of the car....
 
I had a Huco pump but the o-rings that seal the inlet/outlet pipe unions started leaking (ethanol attacked them?) and they aren't available as spares - they'll only supply the o-rings and pipe unions together at £17 (!!) a set so I bought a different pump off ebay for a tenner. It was just listed as a universal fitment, will work at both by the tank or by the carbs but doesn't have any makers name on it.
If I can get hold of a pair of o-rings for the Huco then I'll put it back on because it is a little quieter than the ebay cheapie.
 
Huco 13 3010 is correct. My only regret is not fitting one sooner - it's almost inaudible and the rotating inlet/outlets make routing fuel lines easy.

I'll keep an eye on the O rings though!
 
I never miss an opportunity to recommend the Huco. Buy some remote linkage mounts for a mini (soft cotton reels) to mount the pump on the inner wing. These are about £4 each. You should also add with any electric pump an inertia switch cut-off. These are a tenner on Ebay. Pumps are rated at a certain pressure, if the fuel line is open then the pumping capacity is massively higher. In an accident, you really want this to shut-off rather than pump large amounts of fuel onto that hot manifold!

This pump means of course you retain the reserve functionality (as opposed to fitting at the rear) and it'll fix any vapourization issues you have by going berserk and purging any vapour in the lines.

Another bonus I found out too is a quick hot-wire job and you can pump out the tank when I needed to remove it.
 
Well, looks like I spoke too soon. My Huco leaks. Maybe it always did as this is the first time I parked the car with a completely full tank. Leaks from the top somewhere.

Oddly the model is 13 3020 and not the 13 3010 recommended. I can find no technical specification for this pump anywhere, so one wonders whether the pressure was somewhat high for this. It's certainly not sold any more.

To be fair, it's an absolute minimum of 16 years old and most likely is more than 20 years old. Just ordered a new 13 3010...
 
If it's the same model as mine, it will be the hose fitting on top of the pump.
The fittings are held on with a clamp and they have an O-ring on each fitting that perishes.
AUTO-ELECTRIC-FUEL-PUMP-UNIVERSAL-ELECTRIC-FUEL.jpg
 
My 133010 still keeps on overwhelming the carb float chambers. Thought i'd fixed it but on the way back from clives he changed a fuel pipe which was slightly restrictive and put a fresh filter on and it's overflowing again.

I did try a fuel regulator at one point but it disintegrated and dumped petrol all over the hot engine. Got a second one to try. Blowing the top of the float chamber through seems to work temporarily....

Am I missing anything?
 
Sounds very plausible. Anyway, the pump and hoses are of unkown quality so they are being replaced. I plan to drive quite a bit across Europe and for £50 or so, I'm not chancing it. I'll keep the other as a spare.

Also it's a good opportunity to put decent quality hoses that are happier with modern fuel. This is a very good article from a VW site. Basically SAE J90 R9. My current ones aren't even marked...

Fuel Hose Selection, Pipe Grading (Why R9), Connections &amp Clipping

If it's the same model as mine, it will be the hose fitting on top of the pump.
The fittings are held on with a clamp and they have an O-ring on each fitting that perishes.
AUTO-ELECTRIC-FUEL-PUMP-UNIVERSAL-ELECTRIC-FUEL.jpg
 
The sytec one is what disintegrated. So at least there's no surprise then (And luckily nothing caught fire!)

I have a regulator I've bought in my latest attempt to cure it. It happens to be the Malpassi one you've detailed there! Guess today's job? :D
 
Sounds very plausible. Anyway, the pump and hoses are of unkown quality so they are being replaced. I plan to drive quite a bit across Europe and for £50 or so, I'm not chancing it. I'll keep the other as a spare.

Also it's a good opportunity to put decent quality hoses that are happier with modern fuel. This is a very good article from a VW site. Basically SAE J90 R9. My current ones aren't even marked...

Fuel Hose Selection, Pipe Grading (Why R9), Connections &amp Clipping

Given my experience it may be of benefit to have a regulator on standby too!
 
When a well known local member's car terminally caught fire a few years ago, the fault was traced back to a faulty regulator. From memory it was that Systec one, or a very similar design rebranded.
I bought a billet Aeromotive one to match their pump when it was on sale, but it was still a fair bit pricier than either of those unfortunately
Jim
 
Begs the question as to why people can sell a fuel regulator that is patently not fit for purpose...
 
I did a disservice to the Hüco, it is fine, even the O-rings. Unseen, the hose entering the pump split on the underside where it had stretched over the union. obviously it went hard and brittle.

I have new hosea and a pump and will renew the lot. So basically be even more careful as the hose LOOKED fine...
 
I have seen a fairly new Huco leaking from a cracked union, I guessed someone had just been heavy handed with it, but it got me thinking about long term usage. Although you mentioned you've had yours for many years Peter? Perhaps this one was a fake, or had a fault in the casting, who knows..
Jim
 
Hi, it's the real deal. The car was in storage since around 2001, so the installation predates that. I'm suspecting around 1994 when most of the service documents are dated. I've run the car around 4 years.

As I say, the pump is 100% OK, it merely is the hose.
 
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