croderique
New Member
Hello, I recently purchased a 1964 Chrysler 300 convertible w/ 383 cuin and Pushbutton Auto from the estate of a Chrysler dealer mechanic who bought it new. (My first Chrysler, I normally have Chevys). It only has 74,000 miles. I’m trying to figure out what modifications he made. One was the addition of a Magnetic Impulse Ignition System. When I check the timing without vacuum it was way off. I set it to 10 degrees BTC as shown in the shop manual without the vacuum hooked up. It idles at 500 rpm without the vacuum but only pulls 12 in of vacuum and the needle bounces between 10 and 14in. The dwell angle is about 40 degrees.
Then when I hook up the vacuum to the distributor the timing jumps to about 18-20 degrees, at idle, as far as I can tell. When I hook up the distributor vacuum it idles at 1,000 rpm with 17in of steady vacuum but it has 18-20 degrees of advance. I can’t get it to idle at less rpm.
I have a paper instruction that came with the car, and it shows no advance until 1,200 rpm and maxes out at 18-20 degrees at about 1,800 rpm. Mine starts at 18-20 degrees and maxes out way above that by 1,800 rpm.
I believe the Magnetic Impulse Ignition System was why he set the timing to 10 degrees with vacuum advance hooked up. Any help would be appreciated.
Thanks
Chuck
Then when I hook up the vacuum to the distributor the timing jumps to about 18-20 degrees, at idle, as far as I can tell. When I hook up the distributor vacuum it idles at 1,000 rpm with 17in of steady vacuum but it has 18-20 degrees of advance. I can’t get it to idle at less rpm.
I have a paper instruction that came with the car, and it shows no advance until 1,200 rpm and maxes out at 18-20 degrees at about 1,800 rpm. Mine starts at 18-20 degrees and maxes out way above that by 1,800 rpm.
I believe the Magnetic Impulse Ignition System was why he set the timing to 10 degrees with vacuum advance hooked up. Any help would be appreciated.
Thanks
Chuck