Hi , I know this thread has been covered before but rather than get saturated down with to much information thougt I would start a new one .Running icts T4 1800 engine , rejected to Wayoutwestie recommendations but new low pressure huco fuel is faulty and pulsing at over 3psi resulting in the engine bogging down , plugs sooting up., overfuelling , fuel in oil and white smoke from exhaust .Million dollar question is what low pressure pump would people recommend ? Would ideally just like to fit a pump but no fuel regulator (less to go wrong ) Thank you.
Carter rotary …. fitted one on the recommendation of @77Westy… being good for several years and no need for additional pressure controls.
New huco pumps don’t seem to be good quality unfortunately. Mines an old one and seems still to be working fine but new ones apparently over pressure and don’t play nice with the icts. Yes get a good quality pump (facet?) and a regular.
LP rotary, no need for a regulator and works perfectly with Weber carbs, but the price has tripled (EDIT This might not be correct) since I bought mine. https://www.coolairvw.co.uk/product/ac1273193/ Or buy direct from the US https://www.cbperformance.com/product-p/3193.htm
I've used a few of these over the years and they were always about £85 (last one a while back). Never found one for £40!
It would have been around 2009 and maybe I exaggerated a bit. Whatever, they are a lot more expensive now – like just about everything.
Just gone on Coolair and title and description says the pumps are 3.5lbs and 3.5 psi ??? and inlet and outlet pipes are 8mm what's the best way round this as fuel pipe from tank is 6mm .
I know what I did - I used a cheap additional fuel filter to step up the size from 6mm to 8mm. This sort of thing. This way I also get to see if there's a problem in the tank. You've probably already got one fitted and ready to use just under the tank outlet?
I used an 8mm to 6mm reducer, like this one: https://www.amazon.co.uk/sourcing-map-Reducer-Straight-Connector/dp/B07ZCPY4YG?th=1 The pump includes a filter and you don’t really need another one. 3.5psi (at the pump) is fine for Weber carbs.
This is the easiest and quickest way….don’t think that you can take fuel pumps filter apart, so it provides protection to this (expensive) part.
No easier or quicker than using reducer but it would work of course. The metal filter included with the pump is a replacement item – I’ve changed it twice in about 15 years.
In 15,000 miles my first disposable filter hasn't visibly caught anything, so I assume the metal one is fine... then I've got another whopper filter after the pump. Crazy really but there's never any poop in my carbs.
You could keep your fuel pump and put a pressure regulator in to slow things down a bit. https://www.med-engineering.co.uk/products/malpassi-petrol-king-pressure-regulator
I have read so many problems with the modern Huco pump I have lost confidence in it ! I have fuel in the oil so going to start again with whole new pump and regulator . I have taking on board all the advice i am going for the Carter Rotary but question is where do i mount it ? VW Heritage states in needs to be lower the the fuel tank . Any suggestions or pictures would be good .Ideally would like it out of the engine bay !
But in order for a dead-headed pressure regulator to be able to regulate to a fairly constant pressure with a higher flow, you need to use a significantly higher pump pressure.. it will work better regulating say 6psi to 3.5psi than trying to regulate 4psi to 3.5psi.., your Malpassi with a lower pressure pump may be starving you of fuel on a hill ( running lean and hot too) ...
Very good point ! This is why major manufacturers share engines rather than spend millions on developing and testing , whereas we have to learn and pick up info as we go along. Wayoutwestie has a great sections on running ICTs and recommends running them around 2.1psi with a regulator and fitting a one way valve in the fuel line . About to spend a few quids on some new bits and let's see what happens ? Hopefully haven't done any damage to my engine with all the fuel in the oil . Going to leave the sump bung out for a few weeks and flush through with a load of fresh oil .
This is the setup I have in my bay https://vwparts.aircooled.net/Rotary-Electric-Fuel-Pump-3-25-psi-Adapted-p/rotary.htm
