Re: [doc] Re: Gaydon and Noisy Fuel Pump

[Martin Gutkowski <martin@xxxxxxxxxxxxxx>]

> I find it
> especially when it comes to OEM versus newly designed products...and
> of course it goes without saying, just because its origional OEM is
> doesnt mean its always best, amongst other things, you could take
> alternators for example, been there done that too, you pay your
> money and takes your choice. 

Yes, and I remain puzzled by the fact that our alternator "didn't fit" - 
it went on another car perfectly, and I now have one on mine.

> > You must have a pickup filter that isn't blocked,
>
> Of course but i do like the look of Specialtauto's new filter with
> the inner mesh, nice idea to get maximum flow through the filter.

All the vendors do this filter now (or a slight variation of the same 
theme. OEM plastic ones have disappeared long ago, although I did manage 
to find a new one and it slips into the base of the baffle unlike all 
the new ones.

> > - early cars didn't have this (Hervey's doesn't still) and
> there're also
> > clips to hold it down.
>
> SpecialTauto's is held down to the base by the original baffle screw
> and a cross brace on the underside and holds it snugly to the bottom
> of the tank, a far better fit than the OEM baffle to separate base
> arrangement in my opinion.

Initially he didn't even make the return line drop into the baffle, and 
the baffle doesn't sit tight to the bottom on the ones I've seen. 
Basically I don't like it because it's a poor solution from an 
engineering standpoint. I don't think the original system is well 
engineered either but only from a maintenance point of view. Proper 
operation but difficult to work on is perfereable to easy to work on and 
doesn't work well... There were successive recalls to originals baffles 
to "get it right" and yes, I've assembled a few and they're a bit of a 
pain, but like headlights, easy enough once you've done it a few times. 
A poor baffle effectively reduses the usable volume of your tank. I have 
managed to drive 40+ miles on the fuel light because I had to, not 
beause I wanted to. If you ever manage to fit 48 litres in your tank in 
one go having driven onto the forecourt, let me know.

>
> I must just be a real lucky guy on this one then... especially over
> this weekend with the hot temperatures in the UK and the 400 mile
> round trip i did on sunday round Aidensfield  ( sorry Goathland :) ,
> fortunatley for me did not hear a rumble or 'singing' from my pump.

Errm, what we think is "hot" in this country isn't really. It hit 42 
degrees in LeMans last week and I know there're D's in Arizona that get 
driven in silly temperatures. Getting stuck in traffic with the AC on in 
temps like this is what makes the fuel warm, and being on a low tank 
makes things doubly worse when the pickup hose is not wholly suspended 
in the fuel . I have no spare wheel under my bonnet at the moment and a 
can of drink dropped down to the bottom when in Rouen. When I took it 
out it was as if it was like holding a hot cup of tea. The tank gets 
really, really hot and you only have to drop the pressure slightly for 
the fuel to boil - which is where the noise in the "suck" side of the 
pump comes from.

> Im glad you all got back ok from LeMans seems like a great trip awwy
> judding by your pics. I look forward to seeing more of them and an
> artical in the next mag.....Just what was Nick H pick up problem by
> the way???...

Pickup hose split just south of the pump.

Just want to say I'm not trying to argue here - just promoting a good 
discussion (I hope!)

Martin


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