Quote:
Originally Posted by miff
what is the dwell on a model a points/
|
Someone here actually measured it once and posted it, but, I don't remember what it was. I've never checked it or set Model A points by it. Most other more modern distributors I set the points by dwell rather than feelers.
But, dwell depends on distributor cam being used and number of engine cylinders. A model A cam is different than a model B cam. Both cams will have 90º of separation and dwell is roughly half of that figure. So the dwell for a 4 cylinder engine should be about 45º. But, its not usually the case because of the cam profile. It depends on how the cam is ground which determines when the points open and close which determines the dwell angle and therefore coil saturation time.
Our Model B distributor cam [ I don't think anyone sells a Model A cam anymore] allows for more dwell angle and increased coil saturation than the Model A cam because of its different grind profile. I think the Model B cam allows about 40º of dwell.
Maybe I should check just for the heck it.