Large RPM and Vacuum drop when shifting from park to gear
Initial timing for for this engine/distributor combo was 0*, plus or minus 2.5*
You've measured around 15* at 900 and 20* at 1100 rpm.
Lets put that on the same graph paper so you can see why that would be normal advance for many distributors.
An original Chrysler distributor will have a metal tag on the side.
Here's an example of the timing changes with rpm due to the mechanical advance.
Initial timing for for this engine/distributor combo was 0*, plus or minus 2.5*
You've measured around 15* at 900 and 20* at 1100 rpm.
Lets put that on the same graph paper so you can see why that would be normal advance for many distributors.
An original Chrysler distributor will have a metal tag on the side.
