Good Initial Timing and Too much Total Timing Problem. Seeking guidance to minimize total timing. 1969 Swinger 340 4 Gear
Initial idle timing is 12deg BTDC. This seems reasonable but feel free to comment.
Ported vacuum advance line was connected to the distributor and rpm increased to 3000rpm where timing increased from 12 to 57deg BTDC. I’m sure timing should have maxed out around 36deg BTDC. Looking for guidance what I need to do to rectify this.
Known items. Discovered today during testing spark plug wires on cylinders 5 and 7 are both intermittently shorting to the hooked header pipe. I ordered replacement 8mm wires today with Wire socks.
I have hesitation off idle currently and under hard acceleration it really stops pulling around 2500rpm. At around 2500-4000rpm I can see what looks like smoke coming from tailpipes in rear view mirror. But no smoke or visible smoke at idle. Only higher rpm. Looking at spark plug tips they are white and not golden brown. I assume misfires and timing is most likely linked to the tailpipe smoke. The motor was professionally rebuilt 3 years ago with limited runtime. Standard deglazed bore with new rings. Almost certain it’s not burning oil in the chambers.
No sign that the Harmonic Balancer has slipped. I have an Accel Dustributor. Upgraded to Mopar orange electronic ignition. Seeking help what to look for in distributor to reduce total mechanical timing, vacuum canister, springs, weights etc.
Thanks in advance.
Have a little bit of background how to check timing. Motor was warmed and idle set to 700rpm. I disconnected the ported vacuum advance and plugged carb port to prevent vacuum leak. Set timing light to spark plug wire one and tach wire to coil negative terminal.
Initial idle timing is 12deg BTDC. This seems reasonable but feel free to comment.
Ported vacuum advance line was connected to the distributor and rpm increased to 3000rpm where timing increased from 12 to 57deg BTDC. I’m sure timing should have maxed out around 36deg BTDC. Looking for guidance what I need to do to rectify this.
Known items. Discovered today during testing spark plug wires on cylinders 5 and 7 are both intermittently shorting to the hooked header pipe. I ordered replacement 8mm wires today with Wire socks.
I have hesitation off idle currently and under hard acceleration it really stops pulling around 2500rpm. At around 2500-4000rpm I can see what looks like smoke coming from tailpipes in rear view mirror. But no smoke or visible smoke at idle. Only higher rpm. Looking at spark plug tips they are white and not golden brown. I assume misfires and timing is most likely linked to the tailpipe smoke. The motor was professionally rebuilt 3 years ago with limited runtime. Standard deglazed bore with new rings. Almost certain it’s not burning oil in the chambers.
No sign that the Harmonic Balancer has slipped. I have an Accel Dustributor. Upgraded to Mopar orange electronic ignition. Seeking help what to look for in distributor to reduce total mechanical timing, vacuum canister, springs, weights etc.
Thanks in advance.