1970 TCS 3rd/4th Gear Vacuum Activation

[John H.]

Re: 1970 TCS 3rd/4th Gear Vacuum Activation

Jim, the whole distributor is new and stock setup, but not original, I think the centrifical advance works too well added to the engine vacuum gives it too much timing advance! This 454 seems to have allot engine vacuum at idle. I have measured it, but don't remember what the number was. No engine temp problems. This is a completely restored car.

Chris -

Do you understand the relationship between initial timing, centrifugal advance and vacuum advance systems and how they interact? You might find the article linked below interesting.

http://www.lbfun.com/warehouse/tech_...101Article.pdf

[Chris G.]

Re: 1970 TCS 3rd/4th Gear Vacuum Activation

Everybody, thank you very much for you're wonderful ideas and input. Mr. Hinckley, that was an excellent article on engine timing, thank you. I will have to wait until the spring time when it gets warmer here in Michigan to try some of these ideas and find a hoist.