Re: IML: dual point distributor questions

["Dave Wilker" <wilkerbeast01@xxxxxxxxxxx>]

The 2 sets of points are overlapping, so that the coil has more time to saturate. They don't have four cylinders each. You adjust them by putting a piece of paper or some similar insulator inbetween the contacts of one set, then adjust the dwell on the other set. Then set the forst set the same way.

 

 

David C. Wilker Jr.
USAF (RET)

----- Original Message -----

From: therichardsonfamily@xxxxxxxxxxx

To: IML

Sent: Monday, November 27, 2006 10:38 AM

Subject: IML: dual point distributor questions

Hello everyone:

 

I have a '67 440cid Imperial motor that has a Mallory Dual Point (#ZC365HP) distributor on it.

 

Question #1 - exactly how does a dual point work?  Does one set of points deliver spark to 4 cylinders, and the other set to the other 4?  What is the high performance advantage to a dual point?

 

#2 - I don't see a way to adjust the dwell when the car is running - is that correct?  I check the dwell, shut it off, pop the cap, and guess at the adjustment?

 

#3 - I thought the FSM said to insulate one set of points while checking the dwell on the other.  If one set runs 4 cylinders, that won't work out so well.  How do I check & adjust the dwell on this Mallory distributor?  What am I missing here?

 

#4 - Do I set timing first, then the dwell?  What are the correct steps?

 

This one is right up Uncle Rodger or Dave's alley (two guys that seem to have forgotten more than most of us will ever know about these things)!!!

 

Thanks in advance,

 

Dan Richardson

300L Family Heirloom