The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

enaberif · 05-31-2016, 09:56 AM

Just as refresher for the Gregski ..

16* is your base timing

You will have mechanical timing which is the weights and springs which you need to add up to 32*. So your distributor weights/spring combo should yield 32* at 2500-3000rpm

After that you then have your vacuum advance timing which should yield around 55* of timing when your driving. If you are within these realms the truck should run pretty good.

Last note how much up and down play does that distributor have? If you buy a shim kit you can reduce this for a more stable distributor.

05-31-2016, 09:56 AM	#4047
enaberif Registered User Join Date: Jan 2009 Location: Calgary, AB Posts: 1,181	Re: Restoring Rusty Just as refresher for the Gregski .. 16* is your base timing You will have mechanical timing which is the weights and springs which you need to add up to 32. So your distributor weights/spring combo should yield 32 at 2500-3000rpm After that you then have your vacuum advance timing which should yield around 55* of timing when your driving. If you are within these realms the truck should run pretty good. Last note how much up and down play does that distributor have? If you buy a shim kit you can reduce this for a more stable distributor.