I tried the spring kit out today. The springs are dramatically lighter than the original. I tried the middle, but swapped right away to the heaviest. It was still way too light. The advance started around 900 RPM and advanced dramatically higher than the other. With vaccuum installed, at 1800 RPM it was starting to knock with 42.9 advance where it was 32.6 previously. Ten additional degrees advance!

I immidiately went back to the original spring and bumped up the advance. At 970 RPM where I like the idle, it's 8.6. At 720, where it runs without vacuum, it's 9.3, still the mystery of more advance at lower RPMs.

The car felt to run lighter, better than previously. I'll leave it here for a while and run it.

I've got a full video production in the works, will post when I eventually get it online.

Last edited by mshaw230; 09/16/17 08:14 PM. Reason: fixed a sentence

Mark
'67 Camaro L6-250