Thread: Msd 6al 6462
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dsiegel360 dsiegel360 is offline
Doug Siegel
Join Date: Oct 2007
Location: Bloomington, IN
Posts: 314
Originally Posted by NathanUK View Post
AFAIK the 930 does not have any mechanical boost retard. It only has vacuum advance.
So, when on boost there will be no vacuum so the ignition is retarded. This is why the 930 is very docile while waiting for boost to build.
Try putting pressure on your capsules/pods while you have a timing light rigged up and let us know if you do get any retard Doug.

The late 80's 930 has 2 pots on the dizzy. Both pots create vac advance but only one retards when applying pressure. My experiments show 11 degrees.
Pressure on the other pot shows no change in timing.

Seems strange that on boost a 79 will be at 27 degrees while an 88 will be at 16. If this is accurate, it would be interesting to do torque comparisons. The MSD 6462 with boost retard could possibly be helpful for the early cars. Or, vice versa, perhaps I'll end up taking off the boost line to my dizzy.
88' blk/blk 930: Haltech EFI, Twin Plug, Pauter Rods, Nascar Bearings, custom crank work, dowel pinned case, ported manifold and heads, Kokeln I/C, SC Cams, Turbonetics ball bearing 62-1, BB headers, RARLYL8 Zork, additional 993 oil filter, plx/inyourface gage, RS style coilover, Fikse FM10-17 wheels, TIAL 46mm 1 bar. (where the heck did all my money go?)
Old 04-28-2008, 05:47 AM
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