Old 2100 conversion...

[doc65]

I have what I believe may be an old 2100 carb conversion setup from Gronk or other(based on the adapter plate which is a nice machined unit that takes allens to mount to the manifold & the down pull adapter.) It came with the car when I got it(not installed) the best I can makeout from the documentation(including a prior owners notebook) that came with the car the entire conversion setup was bought second hand from someone that had it on a CJ, then pulled the whole engine for a V8 swap.  I installed it, bypassed the ECM, timed it to about 13BTDC(4500+ MSL here) Idles pretty well now, though I still need to get the choke hooked up & adjusted, but when I took it around the block even a VERY slight acceleration makes it want to die.  I've been trying to ID this carb(source) with out much luck so far.  It has a long accelerator pump as well as a tall(2 stage?) power valve cover, and of course NO tag.  I can't remember the engineering numbers stamped into the front "foot" at the moment, but they did not provide any assistance via google.  I've been told that it's likely a ruptured power valve, but can't seem to find a good definition of the 2 stage vs single stage powervalve or which I might need.

Anyone got any thoughts on what this beast might be from???

[doc65]

Pics of carb in question:

[carnuck]

What's the jet size on the side? First pic almost shows it. (is there an echo in here?)

[kajsdf]

i had the same problem after i did my conversion -- it is probably your vacuum advance to distributor.  inside the port on the distributor is a little allen set screw that needs to be adjusted.  my issue was that the vacuum advance was basically fully on at idle.  i forget which direction does what, you can properly set when your vac advance kicks in.  took a lot of trial and error to get it right.

[doc65]

you should have next to no vacume on the ported vac off the carb so all but no advance right.  I can take the vac line on and off the dizzy at idle & see miniscule change.  however if I put like 5" of vac on it it visibly changes the timing.  So I think that the timing aspect & vac adv shold be pretty close.  I'm currently thinking that I have a bad/cracked/dried out/blown power valve.  Gonna pull the card to check it out/replace it shortly if anyone local has one...

[kajsdf]

all valid theories...you shouldn't have any vac advance til your mechanical. i think mechanical tops out around 20? i'll look for the distributor curves i found later when i'm actually on a computer