Timing curve mystery

So I was trying to recurve my distributor to slow down the advance before 2000 rpms and I kept getting faster advance than I wanted and more advance than I set it up for .
After the 5th try I decided to lock out the distributor and see id it advanced .
Yep... I set it at 20* intial and it climbed to 27* by 2000 .
My ignition is a Daytona Sensors CD-1 with a programmable curve but I have it locked to a static point. The distributors are mopar stock electronics . I have tried 3 distributors and get the same result . Although 1 seems to have a more stable reading at idle ... My timing light is an OTC dial back. It might be the issue so I will try one of my old static lights and verify .


If you can change the curve with the box, locking out the distributor will still let the box set the curve won’t it?

I’ve never used that ignition so I’m just guessing using the info you’ve posted.

Just because it’s interesting, I’ll going to look at that box and see what the programmable curve looks like.

Is this for the engine you had on the dyno awhile back?