Is THIS (http://www.gsdi.org:8088/Text/HEItiming.txt) possible?

If so, can someone explain it to me better?

Thanks,

if you hold the distributor housing and shaft in a stationary position so neither will move, then grap the rotor and twist clockwise you will be moving it the amount that can be mechanically advanced, the article explains how he used a protractor to measure this amount of travel. The vacume advance is built into the module mounting plate and if you apply vacume to the canister you will see the plate move counterclockwise-this amount of movement is the amount of vacume advance which he also measured with a protractor. Very simple stuff here but probably overlooked often or never considered. Note to self: check timing curve with protractor before firing the new combo for the first time :D

Originally posted by baddbob71:
Note to self: check timing curve with protractor before firing the new combo for the first time :D That's exactly why I'm asking :D

One more thing...

If I want 20 degrees mechanical advance, would I only want to get 10 degrees on the protractor?

Does that work the same for vacuum advance (protractor degrees X 2)?

i didnt get that far involved with measure per say.......with my hei.....when i was looking at the timming i knew i had 20 some degree swing built in the mechanical side......so i just pull the hei out and took it apart and welded the slots half shut on both sides........just eye balled it......

clean everything back up and reinstalled

well that was to short of a throw.....36 total which is fine but it had 26 initial.......ooopppss

back out it came and took it apart....did alittle grinding guessing.........then put it back together...... 36 total and 20 initial........hey good enough for me..........and the car started just fine too......

then i moved onto the curve.......mapped it out on paper for every 100 rpms.......then use weights and spring until i came up with a very smooth curve to about 3200 rpms..........

then i moved onto the vacuum canister and changed the 20* can out for a stock 10* can and put in on full vacuum.......this part helps out the gas mileage and keeping the engine cooler at idle and cruise speeds.........20* was causing missing at cruiseing speed....and it didnt sound right at idle either with that much timming.

Casey. Yes. The engine makes 2 revolutions when the dist makes 1, thus 10 on the dist equals 20 on the engine.

Rob