It sounds to me you should also check to see if you have power
going to your points when the engine is shut off. You might have something
wired incorrectly, or you have a slight short in your regulator or generator…ect..
I’ve seen electric cooling fans do this also, they can allow a very slight
current through their windings … just a thought…
From: Forward Look Mopar
Discussion List [mailto:L-FORWARDLOOK@xxxxxxxxxxxxx] On Behalf Of Dave
Homstad
Sent: Thursday, September 15, 2011 5:27 AM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] ignition points on old hemi engines
Ted,
My experience has been completely different. My Dodge has dual
points too. I cleaned up and lubricated the distributor when I installed the
rebuilt engine 20 years ago. I used an NOS AutoLite dual point set I got at a
swap meet (got 4 sets for $1 each, all he had).
The points were set to spec at .017 gap (about a 30 deg dwell
individually) and a combined dwell of 38 deg. There are now 16,000 miles on
these points and they still work perfect. They have been filed lightly twice
and gap checked every 5000 miles. I use a high voltage output coil with a low
resistance ballast resistor. At startup, the engine rarely goes more than one
revolution before firing.
Chinese metalurgy is always to be considered highly suspect and
this is critical to long lasting contacts. They could get pitted quickly from
use or just oxidize from sitting. I would suspect anything from any 3rd world
foreign country, and maybe even modern US made parts if not manufactured by a
well known company. The fact that they fail quickly and the contact even broke
off the arm shouild tell use all we need to know about their
quality. My recommendation is to find some NOS points and condensor, or consider
a PerTronix conversion.
Dave Homstad
56 Dodge D500
On Wed, Sep 14, 2011 at 3:27 PM, Mike & Sharon Higgins wrote:
I'm sure that you know that dual point distributors are
designed to overlap the dwell period to achieve a longer dwell without
setting the points too closely ( decrease the gap, increase the dwell).
If the dual points are set too closely, the primary (closing) set may
allow some arcing while the secondary (opening) set closes. I have always
had better luck by setting the dwell about 25-28° for each set
individually, for a combined dwell of 35-40°. The points seem to
last a little longer and deliver plenty of dwell time.
I suppose that maybe the condensor is maybe too small, and
allowing too much crossover spark.
Good Luck.
Mike Higgins
1955 Belvedere Sport Coupe
-----
Original Message -----
From: Ted
Blackington
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Sent: Wednesday, September 14, 2011 10:57 AM
Subject: [FWDLK] ignition points on old hemi engines
Hello Web-
I have two mid-fifties Mopars with hemi engines, a 56 and a 55.
If allowed to rest for several weeks or months the points
will not fire, and have to be carefully filed to obtain
spark. The points (dual) are almost new, having replaced them
several times. The cars go nowhere, just rest in the
carport. I have replaced them several times-
My later Chrysler products with single points had no problems-am
I getting a bad batch of points from NAPA or the on line
sellers (Chinese maybe??) My last attempt to file them
resulted in the contact completely breaking free from the
arm-
Is anyone else having a similar problem? Any solutions??? I'm
getting too old and inflexible to crawl way back there under
the hood each time it happens-
Your help appreciated
!!!!
(Yeeow! got zapped
again!)
Ted Blackington
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