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???
Pics of carb in question:
(http://i1084.photobucket.com/albums/j412/drbauer65/IMAG0130.jpg)
(http://i1084.photobucket.com/albums/j412/drbauer65/IMAG0131.jpg)
(http://i1084.photobucket.com/albums/j412/drbauer65/IMAG0132.jpg)
(http://i1084.photobucket.com/albums/j412/drbauer65/IMAG0133.jpg)
What's the jet size on the side? First pic almost shows it. (is there an echo in here?)
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.
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...
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