lws@hou2d.UUCP (lwsamocha) (12/04/85)
> >I have a 1953 Hillman Husky Wagon that I am trying to get to run. > * Jim, The ole trusty Husky parts ARE available! Since the Hillan was built under the Rootes Group, various parts are cross-referenced to the Sunbeam Alpine, Hillman Minx, Singer, Arrow, Hillman Sceptre, Rapier, or Humber lines. Parts and information are readily available from: Sumbeam Spares- Lenexa KS (913)541-8500 Sunbeam Specialities- Los Gatos CA (408)371-1642 Classic Auto- Ossining NY (914)941-8673 Classic Sumbeam Auto Parts- Toms River NJ (201)270-4958 Most of these places will offer tech advice or be able to steer you to the right people to answer a question. Good Luck! LWS hou2d!lws *
grr@unirot.UUCP (George Robbins) (12/09/85)
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Subject: Condenser Compatability
Hi Jim:
The condenser associated with the points in a distributor is not a
very critical component. Any part intended for this application that is
mechanically compatable should work fine.
Also, the *only* way the condenser can keep the engine from running is
if it is shorted out. An open condenser will cause excessive erosion and metal
transfer on the points, but the motor should still run. There is not much
middle ground, except a part that only shorts out when it gets hot.
--
George Robbins uucp: {unirot|tapa}!grr
P.O. Box 177
Lincoln U, PA 19352 [The ideas herein are not responsible to themselves!]ksbszabo@watvlsi.UUCP (Kevin Szabo) (12/10/85)
In article <231@unirot.UUCP> grr@unirot.UUCP (George Robbins) writes: > The condenser associated with the points in a distributor is not a >very critical component. Any part intended for this application that is >mechanically compatable should work fine. The value of the cap is usually around .1 mfd; anything in this order of magnitude should be fine... but ... > Also, the *only* way the condenser can keep the engine from > running is if it is shorted out. An open condenser will cause > excessive erosion and metal transfer on the points, but the motor > should still run. There is not much middle ground, except a part that > only shorts out when it gets hot. I don't agree with this. An open capacitor results in a very weak spark; probably insufficiently hot to reliably ignite the fuel mixture. An ignition circuit is a basic R-L-C combination (Resistor, inductor, capacitor) which has a time constant and damping factor that ensures the stored energy is dissapated at the plug. If you reduce the C to near-zero value the time constant is considerably shortened. This results in the voltage building too quickly; it easily sparks across the barely-opened points (resulting in the excessive point erosion you noted). In a correctly functioning system the points are well open by the time maximum voltage is created; in this case the spark plug is the easier gap to bridge and the spark occurs there. This is easily verified by experiment. The next time you are tuning up your non-electronic ignition car, try this: Pull a plug (before touching the ignition) and crank the ignition. (you might disconnect the other plugs so the engine doesn't start). Notice the nice, fat, blue spark. Disconnect the condensor. Now crank again and notice the weak thin spark that is generated. Kevin -- Kevin Szabo' watmath!watvlsi!ksbszabo (U of W VLSI Group, Waterloo, Ont, Canada)