Distributor total mechanical advance

[FirstEliminator]

    The post that holds the heavy spring with the chain link is bent inwards a little bit so the sping will have some play. It just acts to limit the advance once it makes contact. The other spring, the lighter spring is what controls the advance. 

[JimNolan]

amdscooter,
    Thank you so much for that video. Nive looking car you put it in. I think you've got to have all kinds of vacuum with that cam. I believe that engine would idle smooth at 600 rpm and the exhaust noise is fine. Thank you again for sharing that video. Jim

[amdscooter]

 FirstEliminator: Thanks for the info.. looked like a solid link in the photo. Now I get it. 

JimNolan: Hi Jim! I drove it around a lil today while I was making some other adjustments and vacuum for the power brakes was not an issue at all. Also, I have let is idle as low as 600rpm and it seemed to handle it just fine albeit with a bit more lope at the lower rpm. I usually keep it between 800~1000rpm in park. Toss it in gear and it drops a hair. Planning on putting the factory AC back in as well so 800~1k idle is where I'm keeping it.

[amdscooter]

Alrighty then... need more advise. I was able to locate and install a 13L reluctor that allows me to set initial timing at 8~10 degrees initial which I think should be fine with this build for now. I got it installed and the setup seems to keep total advance right at my 36 degree target. Problem is I'm not seeing or feeling the "power/torque" increases I thought I'd be seeing with the new intake, cam, headers, etc.. Even before the rebuild and with the old motor mount split in two if I mashed the pedal I did not have any problems getting that 14 inch stock tire spinning. With the new build it's feeling flat. I mash the pedal and it goes.. but it's lacking. Not a chirp from the rubber at all. Was talking to a buddy and he thought I might be carburetor limited with only a 625cfm. Anyone else think that could be the issue.. or should I be looking elsewhere?

[JimNolan]

amdscooter,
     Put a timing light on it and suck on the vacuum advance tube on you distributor and see if it's advancing. On my 63 I had the timing advanced to 17 degrees initial so I could idle at 600 rpm and thought the engine ran really good. A few weeks later I was admiring the pictures of my engine bay and noticed a rubber hose just laying on my intake. The car ran fine and I didn't even have the advance hooked up. Ran better afterwards and I was able to reduce my timing to 15 degrees. Also make sure that the set screw is turned clockwise all the way on the vacuum advance canister. ( you can set that after you get it running). These things may not help you but if you've got less power now than before you put the cam and intake on it, I''m in trouble also. Jim

[jayb]

Weak off idle acceleration won't be the size of the carb, but it might be carb tuning.  Or, your modifications may have shifted the torque curve up to the point where you need a different converter or deeper gears.  Or, it could be some other issue.  I'd suggest you start a new thread, either in the Member Projects section or in the technical section, provide all the details on the car and drivetrain, and describe the problem there.  That will help you narrow down to a short list of potential problems.

[ScotiaFE]

Is the carb opening all the way?
And are you getting a good shot from the pump?
It's in the carb.

[bartlett]

I would be sure your carb is opening all the way first, then check the secondary. Is it a vac secondary?  also do a manifold vac test.

what do you have for jetting ? 

most of the time lazy is a rich condition. but you will need to eliminate the things above first.

[amdscooter]

I would be sure your carb is opening all the way first, then check the secondary. Is it a vac secondary?  also do a manifold vac test.

what do you have for jetting ? 

most of the time lazy is a rich condition. but you will need to eliminate the things above first.

It is a vac secondary... added suggestions to the list. jetting is stock/whatever it came outta the box with. I'll look up the specs later. Still looking for my vaccum gauge. 

Thanks!