i recently picked up this rabbit that has a single dual carb on it.  it idles about right and runs pretty good except for one thing.  when you go to punch it the carb loads up and stalls for a second and then it goes.  it makes taking off a big pain in the ass.

the guy i bought it from tuned it by ear to idle and what not, but never messed with the secondary adjustments.

i've yet to get ahold of a wide band to see where my a/f is at through the rev range.  but i can tell from the smell at idle that it is def. running at least a little rich.  it also seems to pull pretty hard, but it really dies off higher in the rev range, even a bit before i think it should for a 8v.

i was wondering if anyone has any good advice on adjusting a carb.  is it something best done on a dyno or can it be taken care of pretty easily iwth a wide band?  i can get a hold of a wide band pretty easily i think, if not i was thinking of getting a kit with a gauge so i can monitor that shit from inside the car and make adjustments when needed.

i'm not sure of the jets that are in it right now.  i have the information somewhere, i just need to locate it all.  i'm sure knowing the type of carb would be nice too, which i'll have to check, but this just came up to me tonight to ask about and its dark right now and all the records for the carb are in the car right now and i'm too lazy to go outside and hunt for it in the dark...


update:  i finally got a wideband on the car.  and this is what it is doing.

idle is around 1500rpms and air fuel is at about 17 most of the time.
under throttle partial:  about 15 a/f
full throttle:  jumping on the throttle goes over 18 a/f after that its 15-16
cruise:  cruise is about 12-13.5 regardless of rpm as long as it is constant.

when i bought the car they guy had said he adjusted just the primaries and left the secondaries all the way down.  i'm assuming the secondaries are doing very little which is causing the lean mix under acceleration and then the primaries are flowing too much under cruise, causing the rich reading.  i'm thinking turning the secondaries up till i get a decent idle mixture (14ish) and then turning the primaries down so that i can get the cruise up to around 14-15 and hopefully this will get my acceleration down to the mis 13s somewhere.

the car pulls pretty hard as it is but does hesitate a little when applying throttle and the reading is definitely lean, and the rich cruise would help to explain the poorer gas milage i am seeing.

You know, I have a Holley 5200 that does that but it was Jetted for a 2L and was sitting atop a 1.6L - I figured it was just getting to much gas...

Exactly

Do some WOT runs with fresh plugs and then shut the motor and pull 'em.  That should tell you how rich the top end is.  If you roll into it does it run good? Or does it not matter if you roll in or slam in? 

If the main jets are sized right, it could also be the emulsion tubes being incorrect for that app.

let me know if I can help, I've got Dell 40's on my racecar.

updated first post with a/f readings and my assumptions.

Have you tried the normal suspects?  CB Performance, EuroCARB in the UK, or that Ebay guy in France?