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msd distributor cap
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Author:  themadreefer [ Sat Dec 03, 2011 4:36 pm ]
Post subject:  msd distributor cap

anyone having problems with center electrode in the msd distributor caps for the pro billet series distributor for chevy engines.

i have gone thru 4 of them in the past year alone. have a had two of them wer the center electrode was shattered and the other two wore completely flat. spoke to my machinist and informs me he as other customers reporting same problem.

thanks
archie

Author:  shrinker [ Sun Dec 04, 2011 4:24 pm ]
Post subject:  Re: msd distributor cap

Yes I have had some do it.l quality consistency issue i think. Go find some one with old stock made prior to China.

Author:  WR169 [ Sun Dec 04, 2011 9:08 pm ]
Post subject:  Re: msd distributor cap

Every one I had did the same thing. Even before china. I guess it is the the amount of voltage going through.

Author:  Ken0069 [ Sun Dec 04, 2011 10:27 pm ]
Post subject:  Re: msd distributor cap

FYI, later model pre HEI point distributor caps with the adjustment window put out by GM will work on an MSD billet distributor if you cut the locking mechanism off and file the holes out for the screws. You can go that route and get a cap for a truck engine that will have brass contacts inside that hold up really well for racing use. I've run those in the past with a 7AL-2 with zero problems and since some are having problems with the MSD stuff now, I'd probably buy one again.

Author:  WR169 [ Mon Dec 05, 2011 9:42 am ]
Post subject:  Re: msd distributor cap

Good idea :-k Ken thanks. \:D/ \:D/ \:D/

Author:  Ken0069 [ Mon Dec 05, 2011 11:53 am ]
Post subject:  Re: msd distributor cap

WR169 wrote:
Good idea :-k Ken thanks. \:D/ \:D/ \:D/


THAT's WHY WE'RE HERE! ;-) Steve I just checked and the engine in the Studebaker now has a "Stock" truck cap on that MSD Billet distributor. The stock rotor will work also.

The passenger car cap has aluminum contacts inside and they seem to oxidize and go away quicker than the brass one's in the truck cap. I think the first year for HEI was around what, 1974 so a 1973 or earlier GMC or Chebby 2 ton truck with a V8 should be what you're looking for.

Author:  themadreefer [ Mon Dec 05, 2011 3:42 pm ]
Post subject:  Re: msd distributor cap

good idea ken.
my thought was to remove carbon center and then i would machine a brass insert and press fit into to cap.

Author:  Ken0069 [ Mon Dec 05, 2011 5:52 pm ]
Post subject:  Re: msd distributor cap

themadreefer wrote:
good idea ken.
my thought was to remove carbon center and then i would machine a brass insert and press fit into to cap.


Dunno about that part as I don't ever remember having any problems with the stock GM caps with the carbon center contact?? :-k Why not just get the stock truck cap and run that to see how it does. After all, they're not that expensive.

On another note, how much end play is in that distributor, ie, is there enough to make it bottom the rotor button out in the cap? :-k You should only need about .020 to .030 end play on that shaft.

Author:  themadreefer [ Tue Dec 06, 2011 6:24 am ]
Post subject:  Re: msd distributor cap

does the cap you are referring to have HEI Terminals.
would need to check clearance
thanks

Author:  Ken0069 [ Tue Dec 06, 2011 8:57 am ]
Post subject:  Re: msd distributor cap

No.

Author:  WR169 [ Tue Dec 06, 2011 9:13 am ]
Post subject:  Re: msd distributor cap

Well that counts me out. #-o

Author:  Ken0069 [ Tue Dec 06, 2011 11:07 am ]
Post subject:  Re: msd distributor cap

I guess sometimes it's good to have old stuff then, hey!

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Author:  rick360 [ Tue Dec 06, 2011 12:20 pm ]
Post subject:  Re: msd distributor cap

Ken0069 wrote:
I guess sometimes it's good to have old stuff then, hey!

I don't like those old style wire connectors. I'll take the HEI style ... much better IMO.

My MSD low profile crank trigger distributor caps have been fine. Haven't seen a problem, but I haven't replaced one for a long time. I probably won't now.

Rick

Author:  RAT77BU [ Tue Dec 06, 2011 1:23 pm ]
Post subject:  Re: msd distributor cap

Wow, thanks Ken. That's good to know about being able to use the pre hei caps. I've also heard some horror stories about the newer msd caps. I've been real fortunate, I bought my dist., cap, rotor, and wires in 2005 and have over 500 passes on them, and they don't miss a lick. =;

Author:  themadreefer [ Fri Jan 06, 2012 5:12 pm ]
Post subject:  Re: msd distributor cap

finally got around to making a brass insert for my cap. guess time will tell if it works or not.

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