I bought a facet 1.5-4 psi when I first got mine and was gonna run a tpiece but didn't bother in the end. Have it to a mate and he just ran that, no regulator and t piece, never leaked and worked about 6000 miles til his bottom end let go :)

Ok, that may be an option. The amount of pressure at the carbs is laughable.

Bollocks, I just bought a bike pump too. Either way, one will be up for sale

Max, not really. There is a place in Southam and Silverstone. But since it's not on the road yet, bar hiring a trailer/someone to deliver it, thats not really an option. I feel my best bet is the knowledge from folks on here. As a forum, we must have overcome almost every problem (bar this one!!) so this is the well of knowledge. Both my old man and brother have had a look too, and they know a bit about motors. I pick all brains when I find out they are petrol heads too, so i feel the knowledge I have accumulated, or have access to is greater than anywhere else. It's certainly cheaper! And as I'm not in a massive rush for the car (I mean its not essential) then the knowledge I'm gaining, experience and warm fuzzy feeling of doing something yourself is important too. Maybe I'll rethink this stance post-xmas!

I'll have a shot at the no-T method Yarris, but will likely go with bike pump like you.

I use a facet 1.5-4 psi pump with a t piece and it's been fine for me (well I did until I wrote off the car and sold the engine)

But yeah agreed, get a bike pump as that seems a better solution (Nicks been using his without issue) then you can rule out fuel flow

Is your filter by the tank and stuff clean? (does a mk2 even have a filter by tank?)

preety sure .. Do they have a inline as standard ?

they don't have one by the tank, they just have a wee plastic one usually by the carb

No filter by the tank. Just a single in line job in the bay. It's clean enough and the first filter i flowing plenty of fuel

No filter by the tank. Just a single in line job in the bay. It's clean enough and the first filter i flowing plenty of fuel

Its got to be something simple simon (lol) as the setup your using is tried and tested by both novices (like me) and people who have actually done a carb conversion more than once, and know exactly what they're talking about (mikey)

Either that or youve got something extremly wrong internally!

It is weird.

Thinking man!

I know. Carbs have been replaced, jets cleaned/replaced with new, piping re-routed to reduce potential restrictions in feed, restrictor put into the return line, pump shits out fuel down the return but only seems to dribble out the carb feed.

One thing I'm not sure of is the fuel lines are like 5/6mm id, these then go to 1/4" rubber hose then into circa 8mm pipes at the carbs. This would cause a reduction in pressure, but to the extent that i'd have this problem

Just fuck the t piece out of the equation for your static tests.

If there's too much pressure it'll only leak out the o ring seals between float bowls or out the breathers

May do. Depends if the bike pump comes during the week

Have you done the t piece the right way around? i.e the return comes off the T?

Yep. Had it the wrong way before though. Bit it's made no difference

Where abouts in N.Oxon are you? I'm Banbury based. No expert on carb conversions, but I've got bikes coming out of my ears so know a little bit about bike carbs and fuel systems. Shout if you want a hand.

Ian

Ha! I live in Banbury, car is located in shutford ATM.

What do you drive, will I have seen you?

We've got a red J reg mk3 bready. Only had it a couple of weeks so you may not had spotted it yet. Will be on white BBS RA's from tomorrow. Also have a silver T25 Caravelle/Camper, if your eye gets taken by other old VW's? My family live in Shennington, I've got a little workshop at my gramps place there. Small world! We should meet up for a pint sometime.

Yeah, I love T25s, considered one myself a while back before I got another polo! There's a beat up white one that drives about by a 'friend' of mine. Where's your gramps place in shennington? And without sounding weird, whats your name? We may yet know eachother

Shit this is Gayer than Yarris and El Erica

Edited 26 November, 201213 yr by prankstar2003

I'm Ian, wouldn't think we know each other but you never know. Wouldn't be at all surprised if we've got mutual friends through work. I did 5 years working in schools in Oxford and Warwick.

Proper gay aye, and well off topic!

Back on topic, you need to get that bike pump on. I reckon you might have you're carbs set a bit rich and your current pump setup isn't delivering enough fuel to the carbs. I don't get this tee piece idea at all, surely it just encourages the fuel to take the easy route, if the inlet to the cabs is smaller than the return line then the fuel will always take the easy route down the return line.

Almost all of our bikes run standard bike pumps, they pump until the float valve closes and then stop. Soon as the valve opens it pumps again. No tee pieces, regulators or return lines to worry about at all! Never had an issue with one!

Easy way to prove it would be to rig a bottle up over the engine and gravity feed the carbs. But, if you've got a bike pump on the way that should solve it. Fingers crossed for you!

Yay sheni, spent so many weekends of my life there haha

Ah, your one of that noisy karting lot! Don't mind the Castrol R smell. :-)

Well I'm a teacher, so you never know. But I don't know many Ian's.

With the t-piece method, there should be a restriction in the return to promote flow down the feed line. Currently this isn't happening. The flow to the feed line is little more than a dribble and as Pete suggested, I doubt it's enough to push the float needles open. We'll see when the bike pump is fitted

What do you mean "push the float needles open" simon?

The valves are open, if theres not enough fuel in the bowls to lift the float and armature up to the sealing position.

unless you mean theres not enough flow at the inlet to the carbs to be sure its making it into each fuel bowl sufficiently.

Where is your pump mounted again?

Mounted by the battery. I don't think enough fuel is making it into the bowl. Then as the float starts to lift, and the needle moves into the sealing position on the seat, even less is getting in. It's weird because the inline filter struggles to fill, then will suddenly fill up. When the engine dies the fuel then gushes out of the filter and then into the carbs/piping. Makes me think there's an air lock somewhere and the pump can't produce enough pressure to overcome it

FYI simon