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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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Quote:
Originally Posted by JFairman View Post

Using the 8762 BTM with the static idle ignition timing set to around 12 degrees BTDC made my car ALOT peppier and more fun to drive around town.
Out on the interstate or during full throttle accelerations I can't tell any difference because the final timing with full boost retard is about the same as stock.
Jim, as you know I'm stuck at 8 degrees max static advance because I've reached the stops in distributor adjustment room. Since I have the IC currently off, I may just pull the dizzy and grind out the adjustment slot to get an additional few degrees.
Your 12 degrees advance is a good target, and 5psi as a threshold is probably where I'll end up as well (currenly mine is set at 2 psi).

Something to think about: With 5 psi as the threshold and 2 degrees retard for each 1 psi beyond the threshold, the MSD 8762 will deliver it's maxium 15 degrees of retard at a little over .8 bar of boost...ending up with 3 degrees more retard than stock settings (your initial 12 degrees of static advance, minus the 15 degrees of MSD retard). Probably not even a noticeable performance impact on full boost - and maybe some added assurance against detonation.

For those of us that have applied this technology (and happily, I would add) I think we can all agree that most if not all of the extra advance should be shaved off by the time the engine reaches peak torque.
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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 02-09-2010, 10:03 AM
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