Old distributor refresh, timing questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jeff74 · 12-04-2023, 11:32 PM

Was messing with my distributor today, I bought a moroso advance kit and gear shims. The old springs are pretty loose and the gear has about .080 of play. I shimmed the gear to about .015 of play and the distributor will still drop in and sit down on the intake without a gasket, so I think I'm good there for clearance.

I installed the included copper bushing, the old plastic one had fallen off. From what I'm figuring (and online calculatoring) .. I have about 17 degrees of mechanical advance, so 34 crank degrees?
Am i down to welding the slot closed a bit to limit the advance? From what I'm reading the vortecs like 8-10 degrees at idle and 30-32 total?

12-04-2023, 11:32 PM	#1
jeff74 Registered User Join Date: Feb 2022 Location: Devon, Alberta Posts: 50	Old distributor refresh, timing questions Was messing with my distributor today, I bought a moroso advance kit and gear shims. The old springs are pretty loose and the gear has about .080 of play. I shimmed the gear to about .015 of play and the distributor will still drop in and sit down on the intake without a gasket, so I think I'm good there for clearance. I installed the included copper bushing, the old plastic one had fallen off. From what I'm figuring (and online calculatoring) .. I have about 17 degrees of mechanical advance, so 34 crank degrees? Am i down to welding the slot closed a bit to limit the advance? From what I'm reading the vortecs like 8-10 degrees at idle and 30-32 total? Attached Images __________________ 1971 GMC C25 with a 'refreshed' 1996 Vortec 350/SM465



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