Vacuum cans
:shock: yup that was a bit of a read :shock:
Look'in like a fish.
OK, so you say the vacuum advance is best for a street car.
I would agree,if I could find a can that would work with lots of initial advance and a good curve.
I run a MSD distributor with one medium spring and one heavy spring,full advance at 3000(I think), 18 degrees mechanical advance,and 14 initial,this makes 32 total.Currently without vacuum advance.
I run pump premuim gas.
I have used a stock 18 degree can, a stock 15 degree can,a stock 10 degree can from a Vette, and a Accel adjustable can.None of them have worked without making the engine ping.
The guy who owns and operates the local performance shop in town is the one that suggested the Vette can.He said that it came in at a low Hg point.
Should I try the Echlin#VC-1810 -15 degree can mentioned in the first post?
Whenever I tried to use a advance can I had to retard the initial timing
wich hurt the 60's.I finally used the adjustable Accel can but I had to have the screw so far in that it really had no effect since it only adjusts the total amount of advance added and not the Hg starting point or rate..
If I had known that I would not have bought it.
Is there a master listing of vacuum cans that shows the Hg starting point and their advance rate with Hg loads?
My 79 EL runs a SB350.The combo is 10.2:1,CamDynamics HYD cam 278 221 467 110,Performer RPM,Holley 650DP,S/R Torkers 202/160 Mildly Pocket Ported,1 3/4 inch headers,2 1/2 inch exhaust,MSD distributor,6-A box,Blaster 3 coil,TH-350,Trans-GO Stage II shift kit,TCI 11inch 2400 stall,3.42 possi,26tall tires.
I think this combo might just have too much compression to be able to use more advance at light throttle acceleration during passing, hills and such.