Weber 32 34 Jet Sizes

[philb115]

Had a dig around and found this from Chris S:

quote:

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Jet Sizes

Primary Choke
Main Jet 117
Air corrector 145
Emulsion tube f30
Idle jet 55

Secondary Choke
Main 127
Air corrector 200
Emulsion tube f33
Idle jet 60

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The main jets on mine are 117 / 127 as listed. However, I’ve found a bunch of posts on the web claiming these to be both the 1.3 and the 1.6 jet sizes – and then I found this post giving different (larger) jet sizes for the 1.8!

If anyone has some documentation on how to calculate the correct jet sizes I’d be interested – I understand it’s a function on the 24 / 25 venturis but I’d like to know how it’s worked out… []

[philb115]

Also found this whilst I was digging around, some useful info in it: http://smg.photobucket.com/albums/v328/JohnRamsay/Carb%20pictures/

[86 Syncro]

This has got me wondering now. I’ll have to go down and pull the jets out of my DMTL and have a look.

[Chris S]

Here is the information I have.

Please Note that the Carbs for the 1600 & 1800 have different part numbers.

And courtesy of Alex (mongoose)a rather neat link

http://cowbie.net/car/weber.htm

[philb115]

So it looks like the 117 / 127 are the correct jets then – god knows where that other guy got his numbers!

[philb115]

Reviving this zombie thread…

I’ve got a 32/34 DMTL on a GTI head on the standard syncro block, and the jets I’ve listed above (117 / 127). I’ve recently had an engine rebuild, but with hard acceleration under load (pushing the throttle to around 3/4 at mid-revs) it is a bit hesitant. The guy that rebuilt the engine has said that it’s dumping too much fuel in, and that swapping the primary and secondary main jets can sometimes help (presumably because then the full throttle movement drops a bit less fuel in?).

Has anyone seen something similar? If i wanted to re-jet the carb, is there a “proper” way of doing so other than talking it somewhere specialist on a rolling road?

[Chris S]

Here is all the info I have

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[philb115]

Thanks Chris… I guess I technically have the right bits on there then!

After replacing the fuel filter it runs pretty well (you’ll see why from the pic), but there is still minor hesitation when accelerating. At some point I’ll try switching the jets over to see if it makes any difference…

Anyway, she’s all fixed and running far better than before, especially with the new engine! I’ll have to post some pics soon.

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