You just described how the Dealer Training taught us to do it :
Set to Ball & pointer then drop a screw driver in your pocket and take a test
drive ~ top gear , 30 MPH stamp the throttle and listen ~ no ping ? add more
advance and try again .
Give it all the advance it'll take without ping .
pretty good basic design , eh ? .
-Nate
Dennis wrote :
>
>
> Re : 216/235 & 261 Ignition Timing
>
>
> A couple of years ago my 1953 pickup with 1954
> 235 ran okay when timed on the BB but had a lack
> of pulling power under load. Vacuum and
> mechanical advance worked, the heat riser worked
> and the exhaust system was clear. If pushed at
> low RPM it would backfire through the carb like
> a cold engine, even though fully warmed up.
>
> Since backfire and lack of power can both be due
> to lean mixture, we installed a rebuilt carb and
> verified the float level, without finding any
> improvement.
>
> Since lack of power under load can also come
> from a weak spark we replaced the spark plugs,
> plug wires, rotor, cap and coil. Again, there
> was no improvement.
>
> Still looking, we decided to try a little more
> spark advance. We advanced it âsome,â drove it
> and found a real improvement. Adding advance
> twice more gave a huge improvement. She pulls
> like a locomotive and the backfire is gone. The
> timing light shows we are about 1.3 inches
> advanced from the BB, we guess it to be 15
> degrees more.
>
> This timing method takes me back to the 1950s
> when a kid with no timing light could do a
> decent job by advancing a little and test
> driving until it started to tinkle, then retard
> it a little. If you then found it started hard
> due to too much advance, you backed it off just
> a little.
>
> Dennis McGillis
>
> ___________
>
>
------------------------------------
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