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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
Posts: 3,776
I think this has been a source of confusion in some instances.

In reading the manuals, on some cars you're instructed to set the timing at 4000 rpms (some with and some without the hoses connected), then check the timing at idle against the specs with hoses connected (to confirm the vac retard). Setting it at 4000 means twisting the dizzy to get the correct value. Checking at idle means just that...check to confirm it's correct. If it isn't correct at idle, then there is something wrong with your dizzy advance mechanism and you're recommended to have your dizzy checked out/repaired. If after going through setting at 4000 and it ends up not being correct at idle....and if you were to twist the dizzy again to correct the idle (since there is no other way to affect or adjust the action of the pot/can), then it will be off at 4000 rpm. Obviously the most important setting is your 4000 timing when all your mechanicall advance is in.

Make sense?
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 04-03-2010, 06:28 AM
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