Thread: Rotor for MSD
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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by roland_shaak View Post
MSD's can eat the heck out of a rotor or cause misfire the trick is to index the metal blade on the rotor(s) and then nip off or cut off some metal to cause the rotor to have a point (quasi) not too much metal though i met the original engineers who started the company (they were Raytheon Missile engineers (like me) and they had one of their first shows in El Paso - their facility was across the street from Raytheon in essence) they had a carbon rod with a printed tip and the early MSD6 would blow a 4" + spark at high rev..also if you use an MSD 6series - they recommend you open the gap of the plugs- have done it on many cars i have had all (most) with MSD or motec distributor-less lost spark set VW motors always had problems until i did the file the rotor to a semi pit (equal distance out from the index make on the rotor tip) - then MSD issued a VW dist - but i used Bosch o09's and 050's some re-curved with mostly MSD 6AL's with Mallory oil filled coils- my 964 RSA is going full out MoTec to lose the archaic distributor, and ignition electronics
That's probably good advice but I'm not sure it's all that necessary for just a standard application. I've been running with an MSD6AL for the better part of almost 6 years with a non-resistor rotor, gapping my plugs at .040, and running with 12 degrees static timing advance. The rotor still looks fine, as does the cap.

You ought to shoot a couple picts of what you're describing. Might be a worthwhile adaptation. Thanks.
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 06-12-2012, 08:19 PM
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