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 Dwell angle gets smaller with smaller points gap!

 Created by: jwakil
   Forum Width:     Forum Type: 

 Posted: Jun 26, 2011 09:47PM
Total posts: 162
Last post: Sep 16, 2014
Member since:Jan 10, 2006

 

 

Here is a similar problem and discussion for MG's which are almost the same

http://www.mgexperience.net/archive/point_gap_vs_dwell_angle/241128

Here is some general discussion

http://autorepair.about.com/cs/generalinfo/a/aa052502a_2.htm

http://www.centuryperformance.com/setting-breaker-points-spg-90.html

http://www.honestjohn.co.uk/forum/post/?t=51653

 

 

Norman & Jesse Nelson

Pooper & Pynt Syz

Shasta Minis

 Posted: Jun 26, 2011 07:05PM
 Edited:  Jun 26, 2011 07:08PM
Total posts: 153
Last post: Feb 8, 2012
Member since:Nov 26, 2010

Yes, it is opposite of what should happen, hence the puzzlement.  I'm pretty sure my meter is correct.  + to + of coil, ground to - of coil.  Anyways, I'm taking the advice of Malsal.  I've already ordered a new electronic distributor.  Tired of messing with this thing...wish I had done it before spending a lot of money on trying to fix it.

1978 1275 mini
 Posted: Jun 26, 2011 06:29PM
Total posts: 3975
Last post: Jul 18, 2014
Member since:Aug 15, 2001

Weird because that is the opposite of what should happen because a smaller gap should mean the points open later and close sooner, resulting in a longer dwell.  A larger gap should result in a shorter dwell.  Is the machine wired correctly?  The positive should be connected to the coil and negative to a ground.  I was thinking about my car last night, which is positive ground, and wondering if it would make a difference which the dwell meter is wired. 

 


  

 Posted: Jun 26, 2011 03:57PM
Total posts: 1964
Last post: Sep 2, 2014
Member since:Apr 2, 2005
US
Dwell refers to how long the points are closed so closing up the gap increases dewll, giving the coil more time to charge

 Posted: Jun 26, 2011 03:53PM
Total posts: 4406
Last post: Oct 17, 2014
Member since:Feb 7, 2006

You would be a lot better off replacing the distributor imo the Duciller is commonly known as junk.

If in doubt, flat out . Colin Mc Rae MBE 1968-2007.

 Posted: Jun 26, 2011 02:52PM
Total posts: 153
Last post: Feb 8, 2012
Member since:Nov 26, 2010

I have a Ducillier dizzy I'm trying to set my points gap on my new points correctly by using a dwell meter.  I have the dwell meter connected across the +/- of the coil per the instructions.  The initial dwell reading was smaller than the spec value, so I thought this meant that the points gap is too large.  So I decreased the gap and got even smaller dwell!.  If I increase the gap the dwell gets larger but only to a certain point after which the car doesn't run.  I can't get it to the 57 degrees spec.  I had measured with the old points and the reading was pretty close to the spec dwell.  What could I be doing wrong? 

1978 1275 mini