dist cap

[Carl Stouffer]

> Hey guys, newbie back with more questions. Somewhere a few days ago in a galaxy far far away (usually where my head is) I saw a pic of a GMC on
> one of the sites with a stock type HEI looking cap with an external coil post. Supposedly an MSD unit but danged if I can find it again. The guy
> even had a part number for it. He said he had no coil problems after changing to it and removing the coil from the engine heat. Anyone know what it
> is...Thanks.....Tom

You should find what you need here:

http://www.gmcmhphotos.com/photos/general-pictures/p63438-msd-coil-conversion.html
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member

 

[terry1]

Is this it:
http://www.gmcmhphotos.com/photos/general-pictures/p62221-remote-coil-installation.html

--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.

 

[chris tyler]

Its an MSD 8401. You will also need a high tension lead of sufficient length and a good coil like the MSD Blaster

To he honest, for our applications iits a bit of overkill UNLESS you ad the MDS CD box or the equivalent.

Also, most failures I have had with HEIs its the module at fault. Only once have I had a pickup fail. If you go tho the MSD box you can leliminate it
or keep the working module in place in case it fails

--
76 Glenbrook

 

[Jim Hupy]

I personally have experienced several failures of MSD ignition related
products. Much more so than Genuine GM HEI products. HEI coils will easily
drive a 50 kv scope trace off the top of the display screen on a very
accurate Sun diagnostic scope. They will bite you right through a pair of
Snap On phenolic resin spark plug boot pliers. How much more spark than
that do you need. Shouldn't take more than 12 kv or so to jump a .040" plug
gap in a lean mixture low compression environment. Just sayin'.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> Its an MSD 8401. You will also need a high tension lead of sufficient
> length and a good coil like the MSD Blaster
>
> To he honest, for our applications iits a bit of overkill UNLESS you ad
> the MDS CD box or the equivalent.
>
> Also, most failures I have had with HEIs its the module at fault. Only
> once have I had a pickup fail. If you go tho the MSD box you can leliminate
> it
> or keep the working module in place in case it fails
>
>
> --
> 76 Glenbrook
>
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[john r. lebetski]

Adding external coil adds failure point. The lead between the coil and cap gets taxed with all the pulses not one in eight like cylinder wires. My 97
Tahoe has that setup factory and that lead burnt off at the cap shortly after it was new to me vehicle. End of wire was gone but hidden by boot. In
the rain. In an intersection. Cost me a tow home to where I could diagnose. I can only imagine what they would have charged me if it was towed to a
shop with "computer diagnostic fees" and parts I did not need.
--
John Lebetski
Woodstock, IL
77 Eleganza II

 

[john r. lebetski]

On the other hand I have been driving GM HEI coil in cap type since 1976 and never had a coil, module or pickup failure. You decide.
--
John Lebetski
Woodstock, IL
77 Eleganza II