You could try your Hollry 1940 out on it, they work fairly good and see if it' not so rich, too bad you don't have a 68 point distrib to try too.
The rumbly idle is the only upsetting thing - and I am positive it's just running way too rich at idle. I don't think it's an ignition problem.
1. I have NO idea what the fuel inlet thread size is. It's not the same as my 1909 - it's quite a bit larger.
2. After seeing all the pieces, I realized the 1940 has a thermostatic choke & hot air tube, which of course means there is a matching hole in the exhaust manifold I hadn't previously noticed. The hole has a crack at the top, towards the head. Does it seem reasonable I can use some copper RTV to patch that hole, and seal the tube into the manifold? I need to make a new tube - the one on the carb is too short and electrical taped to some vacuum hose. Not sure how that was intended to work.![]()
Only bad thing is that after opening the throttle the car is very hesitant to return to idle
I did not bother to mess with the hot air tube. It's summer in Sacramento and the choke is going to be pointless for the next many months. I just capped off the stub of the old/wrecked air tube. Is that the correct approach, or should I leave it venting to the atmosphere? Does the carb use the air coming in that tube for anything and/or will the resultant vacuum in the tube hurt anything?
thesameguy":cslys2er said:Maybe when it's done, I'll have the courage to attack the q-jet on my Cadillac 429.
thesameguy":3vkxmo5y said:I'm thinking it may be a side effect of running an LoM dizzy with no SCV, possibly in combination with a weak vacuum advance.