Have an XJ6 S2 (75) with a 45D6 distributor, i know what the total advanced timing is for mechanical weights advancement, wanting to know what the vacuum system adds to the advancement or what is the total advance for the ignition timing,.... only change is the points are replaced with electronic pick-up, this is NOT a 45DE6 dissy

**NOTE** i only need a one line response, a monologue of 100 lines not required (you know who you are) i know ppl mean well but i don't need a history or lecture..........

 

Ok, well i've worked out what my system should be........but what i'm also looking for is tech info on lucas distributors - vacuum units and their values, i know they differ in vacuum deg/ but would be good to know what value vacuum inHg is required for maximum effect.