I've worked on a lot of motors before but this one is giving me fits. Maybe somebody can help.
This car was running pretty good but I was having to use 12v battery to get it to turn quick enough to start. Long story short the 12v fried the points and condenser in the stock dizzy as expected. I didn't really care because I planned on installing a Langdon HEI.
I took the opportunity to convert the car to 12v w/ 1-wire alternator, 12v coil, completely new wiring harness. All electrics are good to go. I also installed a new exhaust system.
I installed the Langdon HEI and a set of 8mm accel plug wires and now the thing is running rough and sounds like it's missing or out of time. Can't get it to smooth out. I figured I may have accidently switched a wire pair so I disconnected them two at a time to see if it would smooth out and nothing happened. Adjusted the carb mix and idle still nothing. Adjusting retard and advance at the distributor... still nothing. Motor is shaking side to side like you would expect to see a motor do that's out of time. I even used the suggested spark plugs. I've never had this much trouble installing a dizzy and I'm not sure what I'm missing. I have double and triple checked the firing order and the plug wire order at the dizzy and just can't seem to work it out.
I dropped Tom an email hoping that he can notice something and tell me what the issue is. But hoping I can get some other suggestions in the meantime since I know he's busy and sometimes takes awhile to get back to emails.
I posted links to videos with sound of the engine before (without exhaust) and the engine after the HEI install (with exhaust). To view and hopefully diagnose.
One thing I do know is that the heat flapper valve is stuck in the shut position. I wouldn't think that it would creat the effect that I am seeing since it was stuck before and ran ok. Any tips on getting it unstuck would be great though.
Thanks.
Before:
http://s18.photobucket.com/albums/b117/hotrodderguy/1951%20Chevy/?action=view¤t=020.flvAfter:
http://s18.photobucket.com/albums/b117/h...04-17164746.flv