i didnt know were to post this at to get the best results so i will start here. i have a stock HEI set up on my car, i have a little bit lighter springs in it. I dont have the 200 bucks to get a performance distributer so I am thinking about having the stock one recurved, i have read about it in magazines before but cant find any of them. My boss told me of a guy here in town that recurves them and I am going to get a hold of him next week. Every thing I have read and people have told me is that i should have intial around 12-14 and total about 36 by 2500. I know that each engine is different and tuning will be required and thats fine, I just wanted some more input. Thanks. :hail:

 

Get yourself a curve kit, which contains an assortment of springs and weights; some of them also come with an adjustable vacuum advance too. I think the Crane one does.

The little cam on top of the dist shaft has a shape that the weights work against. They differ widely from one dist to another. You can file or grind that to make it have more centrifugal advance. Some stock ones allow only as little as 10° of centrifugal, especially the ones from trucks and other low-perf stuff.

The "ideal" curve for performance use is around 10-12° advance at 500 RPM, centrfugal starting at around 1000-1200, with a total additional advance of around 24-28° at 2500 RPM or so, for a total of 34-38° at high-speed WOT; and then about 10-12° more of vacuum advance on top of that, with it dropping out at about 2-3" of vacuum below whatever your motor cruises at (at like 60 mph in high gear). So if it has 16" of vacuum then, set it to drop out at around 13".

Tune from there.