Points are not supposed to spark. The points essentially short out the
secondary coil ( the inner coil, not connected to the spark plug.) in the
coil ( the coil is really two coils, one wound around, but not touching
the other). When they points open, the constant current that was flowing
through points has no where to go except through the secondary coil, this
rapid change in current flow causes a large E field in the secondary
coil, which induces a current in the primary coil. the ratio of winding
of the two coils creates a high voltage potential on one side of the
primary coil. This gives your spark. the charging characteristic of the
condensor, which is really just a capacitor, helps to insure that the
secondary coil is not "overwhelmed" which would leave no where for current
to flow except back across the points. this way the condesnor prevents
the points from arcing (sparking). It doesn't always work perfectly
though, that's why sometimes you may see a small spark across your
points. If so, check the gap and get a new condesor.
-alfie
On Sun, 17 Sep 2000, Woods E. Houghton wrote:
> Points are exposed to spark. The condenser conduces the voltage to make a
> bigger spark.
>
> Woods
> 53 5 window
> -----Original Message-----
> From: MKlepp4335@cs.com <MKlepp4335@cs.com>
> To: old-chevy-truck@egroups.com <old-chevy-truck@egroups.com>;
> oletrucks@autox.team.net <oletrucks@autox.team.net>
> Date: Friday, September 15, 2000 4:30 PM
> Subject: [old-chevy-truck] Condensor & points Question
>
>
> >-------------------------- eGroups Sponsor -------------------------~-~>
> >Nothing makes you feel like a new car
> >So treat yourself the easy way
> >Click below
> >http://click.egroups.com/1/8419/18/_/577597/_/969056799/
> >---------------------------------------------------------------------_->
> >
> >Please tell me if I'm wrong - I always thought that the condenser prevented
> >sparking (arcing) across the points, it even says that in the AD shop
> manual.
> > My FLAPS guy says, no. The points are supposed to spark, that's the way
> >they work.
> >Who's right here?
> >I put new points and condenser in my '48 and within a few minutes of run
> >time, they had evidence of arcing. I spun the engine with the cap off and
> >the spark at the points looked like the spark the plugs should have. (I'm
> >still chasing the poor running condition.) Thanks as always.
> >Mike Klepp
> >'48 3100
> >Wichita Falls, TX
> >
> >Ole Chevy and GMC trucks rule!
> >
>
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|