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Old 07-11-2019, 12:02 AM   #14
40 Deluxe
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Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,779
Default Re: How To Hop Up On A Budget No. 1 Ignition

Quote:
Originally Posted by all american boy View Post
'It doesn't take long.'


Ah ha! All these years was never quite clear on that.


Okay.That will make the job easier.


'cut the ignition at the end of a run, shift to neutral, stop and read the plugs'


That takes care of 'acceleration'.Idle reading should be simple.


'Cruising'(will find out correct name of carburetor circuit) looks like a bit of a problem.


Any ideas?
Simply cruise at a steady 60 MPH or so on a level road for 5 miles or so, kill the ignition, shift into neutral, come to a stop and read the plugs. You do realize, of course, that to get the most accurate readings, you must install new plugs for each test!
A better idea: Use an air/fuel ratio meter with a wideband oxygen sensor. This way you can read the exact fuel mixture instantly under all conditions as you drive!

By the way, the carb circuits are: idle, main, power and acceleration. You can add choke (or cold start enrichment) if you want to.
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