Many Thanks to all who offered sugestions and help with ny timing questions! I think I've got everything sorted out for now.
My truck runs better than ever with the BB lined up with the pointer.
Left the plugs adjusted to +.040" because that is the recommendation of my Pertronix rep. I have Pertronix in all my older
vehicles and run them all with the extra .040" plug gap.
There is just one last thing that I can*t figure out. With my old ignition timing - which was incorrect - I had an engine noise above
2500 RPM that drove me crazy. It was a loud rattle and everything was OK as long as I kept the RPM's below 2000.
With the new (correct settings) the "rattle" noise is just about completely gone. When it's cold and the oil pressure hasn't gottten up to
where it should be there is a slight rumble that goes away as soon as the pressure is up. Drove a short stretch today at 3200 RPM - NO MORE RATTLE NOISE!
Was I hearing detonation with old retarded timing settings? BB left of the pointer in the window was definately retarded! Adjusted
the distributor to the correct BB/pointer setting by turning it CCW.
Checked my plugs after a short test drive earlier today - no problem and no sign of detonation. No residue on the plugs.
Compression is excellent and all cylinders are equal at approximately 145#'s. That's warm and WOT.
There's no smoke warm or cold.
Starts fine and idles just right at 475 RPM.
We have great gasoline over here and I run 95 octane with 10% Ethanol. There isn't any "regular" anymore and there is a no ethanol 95 octane high test and 105
octane super high test.
Any ideas?
Thanks again to all.
