Distributor vacuum: Ported vacuum vs. full manifold vacuum: Which is better?

Excaliber · #1 (**permalink**) 05-10-2010, 07:52 PM

One thing I don't like about the MSD vacuum advance is it's non-adjustable, in any way. It has a set vacuum signal required and set amount of vacuum advance it will provide. Next tme I'm going with a dist that I can "play with". Or buy the parts to modify my existing MSD.

jhv48 · #2 (**permalink**) 05-10-2010, 08:02 PM

Try both, one will run better than the other.

Use that one!

jwd · #3 (**permalink**) 05-10-2010, 08:12 PM

Quote:

Originally Posted by Excaliber

One thing I don't like about the MSD vacuum advance is it's non-adjustable, in any way. It has a set vacuum signal required and set amount of vacuum advance it will provide. Next tme I'm going with a dist that I can "play with". Or buy the parts to modify my existing MSD.

MSD uses Delco advance units and there are tons of them that have different total advance and vacuum required to operate.