I see plenty of posts on restricting the vacuum advance on a distributor. I even see the pics that are shown with the drill bit in them. But i can seem to understand what that all represents can someone please explain what they mean, and how to restrict the advanve to 8-10 degrees please. On a point distributor so i can try. Thanks Rich
Take your vacuum advance canister out of the car and look at it. When vacuum is applied it will advance to a certain point. By limiting it, you just make the point where it stops sooner. I fabricated a stop out of a piece of sheetmetal to limit my advance canister from 12 degrees to 10 degrees. To see how it advances, apply vacuum to the canister.
Rich, with a recurved distributor and/or more initial timing the total mecanical advance gives "more degrees" earlier (this is what is making more power :Brow: ). But more mecanical + the stock amount of vacuum advance* gives us to much total advance = ping/knock appears at part trotle. Why "full" intake vacuum? ..better economy (more mpg) ..It gives you the benefit of letting the engine run the maximum amount of timing trout the entire rpm range ..and a smother idle + a cooler running engine Remember: As much timing at al times without the ping/knock thing is what makes POWER ! :laugh: If i left something out... feel free to fill in or correct me Lars
I got these pictures from The Ignitionman - Dave Ray :beer http://www.davessmallbodyheis.com/ "pas them on to anyone in need"
I recommend that you get your hands on a Crane 99601-1 recurve kit, it contains all the goodies you need ! (but there is a better way "The Ignitionman:s way" to install their limiter plate!) Lars
thanks guys i now see what they were trying to show in those pictures before i couldnt see the plate on it before. Thanks Rich
