Discussion in 'Buick FAQ' started by LARRY70GS, Jan 2, 2005.
Some guys are still confused though.
Larry is this weight issue also for street and highway driven cars? Frank
Hi Larry, I have a quick question re: total timing advance for stock GM distributors.
I'm working on an L89 396/375 BBC (I know lol) but this is a good friend of mine.
I'm trying to iron out some general issues with the car as I believe a few, lets say "unqualified" individuals have been monkey around with it.
With the timing issue, it appears to be getting far too much total advance (52.2*) all in at 2500 rpm
It's a stock original GM date coded points distributor. I set the initial to 10* for now, but believe the factory spec calls for 6*
Is there a stop for the centrifugal advance weights in these factory distributors? Not too familiar with the "old" points set up any more. That much advance set alarm bells off in my head. In my GS I run an MSD billet and have it locked in at 34* tops. Maybe it's missing a stop bushing or something?? TIA
It certainly could be missing a bushing. Total advance is controlled by the length of a slot under the weight plate. I have a good picture of it in post #3 on Page 1. The Mr Gasket kits have a nice brass one. A bit difficult to install with the distributor installed, but not impossible. Use a dab of epoxy for insurance.
Thanks Larry appreciate it