Ok away to see if I can re-jet my 34ICT's as i have the standard jets in after taking out the idle ones, which explains why im running around in circles trying to get it to run well.

I have been reading up but there are a lot of conflicting results with what to use which isnt helpful at all.....

I'm about to buy...
F6 sized emulsion tubes
60 Idle Jets
165 Air corrector Jets
135 Main Jets

these seem ok? or should I go for a slightly bigger main jet at 150?

And how hard is it to take these apart and re-assemble? I've never done carbs before so im a bit apprehensive.

It depends on what size engine you are running!

Rob

standard 1600 type 3 with a 009.

Quotestandard 1600 type 3 with a 009

Then those sizes on your list look like a perfect starting point.

Jetting is not as hard as many think, The symptoms will show you the way to go, up or down to lean or richen.

Give it a go, read up on where the jets are and you will be surprised at what can be done.

Main jets with a lower number will be leaner than ones that a bigger number.
Check what sizes are available and maybe get some (3) that are in sequence either larger or smaller
depending on which way you need to go.

Driving the bug will give you clues as to whats happening, a loud banging backfire, especially on the 'overrun' down hills is usually a sign of being too rich, the unburnt fuel igniting in hot the exhaust.

A 'hissing' backfire back up through the carb is a sign that its too weak, the headers getting very hot and fuel thats on it way to the cylinders ignites
'above' the valves. This situation is the worst to have, as the heat build up in the heads and engine can damage it severely...

You will be able to eventually refine the mixture and get it just right.

The F6 emulsion tubes are good, mains should be 135 or 140, the air correctors are about right but you should only need 55 idle jets. It will run a lot better with a vacuum and mechanical dizzy, rather than a 009

Rob

cheers guys. there much in between f3 and f6 emulsion tubes? theyre the ones i see most often but no real reason why.

ill get those ones with the 55 idle. hope this sorts it out as iv been going mad with it lol. 

Quote from: apmaman on April 16, 2014, 10:11:05 PM
cheers guys. there much in between f3 and f6 emulsion tubes? theyre the ones i see most often but no real reason why.

ill get those ones with the 55 idle. hope this sorts it out as iv been going mad with it lol. 

I have been reading up on jetting the ICT carbs cause I am putting some on an 1835. It seems f6 is best for VW's followed by F3's. I ordered some F6's today, I tried to get my engine running with the original F78 emulsion tubes but the engine keeps dribbling fuel out of the main jet outlet in the middle of the venturi, so I can not adjust the tick over mixtures. hopefully this will sort it.

Rob

Yeah from what I read the original ones will drown the carbs and make them struggle, especially under load like hills etc. where i have noticed as where I am in Scotland is very hilly.

Well cheers guys, ill order them tonight and try to find a big vat of carb cleaner to soak these guys in for a few days. I have to assume that they have not been serviced since they were installed on the buggy during 1999 where all the receipts come from.

I might remove the internal filters inside the carbs beside the little pump, mainly due to having 3 fuel filters in place already, dont really see the need for it? one pre pump, one post pump and another pre-carbs.
Depends on their condition after a nice soak in some carb cleaner though, if they come out nice ill put them back in.

Yeah, mine were full of dried crap, I would leave the filters in the carbs though and take one or two of the line filters out. Check the accelerator diaphragms are still soft and have no splits in them.

Rob

Will do! Cheers again. Duno where I'd be without this site at times I swear! 

Yeah but when you have built your buggy and have lot's of problems and get them all sorted, you become a wealth of information for others 

Rob

I hope so! Might make number 2 a bit less of a headace to build!