14 replies to this topic

[grahama]

Hi all,

 

I know I have some fine stuff in the fuel tank I just cant get rid of so I have put one of these in to catch them.

 

 

 

 

I have looped the fuel lines in gentle curves to avoid kinking and tie wrapped it away from the exhaust manifold. Look ok as it is??

 

I have a glass and steel one to replace this after the initial tank flush which is cleanable but will wait for a while before fitting it.

 

Your thoughts/recommendations are appreciated.

 

 

 

Graham

 

 

 

[Broomer]

I always ran mine under the boot floor just below the tank.

Its all personal preference I guess.

[grahama]

I did think about that to keep it out of the heat of the engine but thought that when I put the glass one in under the boot might be asking for trouble, stone wise !!

[alex-95]

I would put it right after the tank too, stops it going through the pipe which if it did could block it.

[mk1leg]

I fitted mine before electric pump .........

[666junky]

Be careful with those crappy plastic ones - mine popped off and fuel poured over the engine and exhaust.. thankfully it hadnt been running long. Found it very difficult to get any grip on the plastic once fuel was on it - any tighter and it crushed the tubes

[grahama]

Sounds like a rethink is in order.

Mk1 is that a glass one with the steel body under yours??

[Broomer]

I fitted one of the sytec metal jobbies, it's massively overkill but does the job.

[Spider]

I fitted mine before electric pump .........

 

Fitting one either side of a mechanical pump is OK, however I'd express some caution at fitting one on the inlet side of an electric pump. When (if) the filter blocks, it will allow the pump to stall in an energised condition and will cause the pump to burn out.  Just saying,,,,,,

[Broomer]

I fitted mine before electric pump .........

 
Fitting one either side of a mechanical pump is OK, however I'd express some caution at fitting one on the inlet side of an electric pump. When (if) the filter blocks, it will allow the pump to stall in an energised condition and will cause the pump to burn out.  Just saying,,,,,,

Isn't the whole idea to stop crap going through pump in the first place? Therefore it has to be before it.

[Spider]

 

Isn't the whole idea to stop crap going through pump in the first place? Therefore it has to be before it.

 

 

The pumps will actually withstand quite a bit of crap going through them, unlike the carb, which has precision parts and the engine, which wouldn't appreciate the added wear from the crap.

 

The pumps only have rubber bits in them. I guess in time, it will eventually wear them, but at least it can be rebuilt (in the case of an SU), but a burnt out pump is not worth rebuilding.

 

I only made mention of this because I've seen it happen a few times now.

Edited by Moke Spider, 31 May 2016 - 08:48 PM.

[mk1leg]

I have never had any problems with the Glass filter connected to the inlet side of pump,,,,,,,better the dirt is caught before if enters pump......

[dklawson]

You do want to use a coarse or large filter if you fit one between the tank and pump.  As Mokespider said, a small, fine filter can plug quickly from tank scale.  I had an electric pump burn up years ago from just that problem.

 

The glass filter shown under Mk1's car use a pretty coarse cloth type mesh compared to paper filter elements.  They are hard to clog and do provide filtration for the pump intake.  They can break.  I have one on my car and it is covered with a short length of foam pipe insulation to protect it from road debris.

 

The plastic type shown in Grahama's pictures are the type commonly used on air cooled VWs.  They have been used for years on a lot of British cars because they are compact and relatively inexpensive.  They are typically placed between the pump and carb intake.  I have never seen one fail.

[Spider]

(Doug, got yr post, re: the rocker jig, I'll snap off a photo next time I'm in the shed)

 

The topic of stalling pumps came up on another forum today by co-incidence.

 

This was what I wrote over there on how they burn out from filters on the inlets:-

 

"If the inlet of the pump gets blocked up, when the pressure on the outlet drops, which could be because there's no fuel flowing through the pump (from a blocked filter for example), the pump will try to suck and push more fuel through. If it does get some but not a full load of fuel (which will happen from a blocked filter), the pump won't reach full stroke (hydraulic lock) and so won't trip the points to turn it off, leading to a burn out in fairly short order."

[ukcooper]

Seen a few now where they have taken the spi/mpi filter bits and put them on the rear Subframe.

Good for been screw in and for looking like a solid filter .