olds timing

[tahiti jet]

any one tell the best setting for 455 olds?

[james s]

What year is the boat/motor? Check for crank rotation on the pulley. Depends if the rotation is clockwise or counter. This will narrow down where to set the timing. Get back; I'll let you know.

[Eric]

My .02:
You want 36 degrees total advance.
So subtract the advance of your distributor from 36 and you have the initial timing.
In my case:
Mallory COMP 9000 unilite dist. = 24 degrees advance so
36 (total advance) - 24 (dist. advance) = 12 (initial advance). Set the initial timing at 12 degrees.
Eric

[james s]

What if you have an HEI ignition? Distributor advance doesn't mean much then!!!
If you have an HEI, then set for 16 BTDC; if not, set between 8 & 12 BDTC.