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Old 04-19-2013, 06:35 PM   #24
Sharps40
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Join Date: Oct 2012
Location: here
Posts: 2,408
Re: The Official John Lee Jr Thread

A big step forward. Tonight it started fine. Rough idle comeing off choke. Incidentally Fast idle is bout right. I can already tell though - bit of a cold natured carb sittin up on a 3" high adapter.

But the test ride was a bit of a dissappointment. A real lack of power across the entire RPM range and flat/surging on the secondary. What to do? Momma at work, power is out and we're between tornados North and Hell Storms South. I think I'll check plugs and timeing.

Plugs looked fine. White insulator, light black soot on rim and just gettin yellow/brown at the gap. Hmmm-the instructions I didn't follow from Mr Langdon suggested up to 18 degrees BTDC with the GM HEI. Figured Nah - too much, factory is only 4 with points afterall. I had the HEI set at 10 BTDC and it ran great on the Model B. I thought 10 was my big adventure in timeing.

But what the heck- assuming I have the carb close (I followed instructions the 2nd time I adjusted it) let's hook up and be real adventurous with 12 BTDC. Well, rpm went up and the motor smoothed out more. WTF? Bumped it to 15 BTDC and smoother yet. Test ride time. Buttoned John Lee Jr up and right up the driveway I could feel it. He was gettin out of his own way. Out on RT42 the acceleration and power were up and smooth. No surge, no ping. (Iffin ya'll woulda told me up to 18 BTDC I'da figgered ya fer fools).

I-m rollin smooth at 60 mph and decided - I gotta know. Mashed that pedal flat. NO FLAT SPOT! Just smooth even power pouring on slow and steady. ****Fire we're onta sumthin here! Yanked my foot off the gas and the engine pulled down smooth from 70+ mph. Man-O, did it again, over and over - same results, and No Pinging. Ah heck now I really gotta fine tune this carb and ignition.

It's gonna be just fine I think. Highway run tomorrow fer sure!
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