- Dec 14, 2017
- Reaction score
- Sacramento, CA
- My Car
1973 Mustang Grande, Light Pewter
351C H code w/FMX transmission.
23k original miles
I went to check the timing on my 73 Grande after installing a Pertronix ignition module, and noticed the timing was way off (30+ degrees advanced). I retarded the timing to 8 BTDC, and the car ran like crap. When I went to restart it, the engine backfired into the exhaust so i know the timing was too retarded. I advanced the distributor back to where the engine was happiest, and for the heck of it threw the timing light back on it. The timing marks seem to coincide with the peephole looking thing below the timing tang. What is that peephole? Is that what I'm supposed to use for timing reference, or has the outer ring slipped on the harmonic dampener?