advance

[Dale Uhrich]

I was wondering if most poeple run the vaccum advance or not. which motors had it and if it's better or not. I have motors both ways.

[grey beard]

Dale,

My son in Montana has five 1 1/2-2-ton B series Dodges, none of which have vac advance units. Parts book says up to one ton but I know there are exceptions to that out there running around.

Based on how poorly these engines run with the vac advance not working properly, I must say that the centrifugal advance curve on the non-vac advance distribuors must be much different than those with. In other words, a distributor with the vac advance unhooked will work much differently than one not made for a vac advance.

Any thoughts on this?

Sure would be fun to try both distributors in a known engine and see how the performance compares. If any of you have experience along these lines, please fess up and share your wisdom with this pilgrim.

Thanks

[pflaming]

Assuming a spark advance is beneficial on hill pull, the a vacuum advance may not have been used in flat land areas, such as parts of montana, etc. OR in a large truck with a two speed axle, the different gears may have, in effect served the same purpose as a vacuum advance which was a 'temporary' / automatic " down shift to climb a hill. All this is purely conjecture or 'food for thought'. A friend and I were asking the same question last week.