TBI motor tuning - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**jollymon02** · Yesterday, 11:10 PM

Hey all,

I have a TBI motor running a aftermarket EFI and mild cam. I'm working to get the tuning sorted out. I currently have an HEI distributor with vacuum advance, but have the option to change for a billet and let the EFI handle the timing control, which would make it more like an upgrade from the factory air/fuel delivery.

My immediate question is where should I set the base timing, 0 as factory, or more like a typical SBC 8 degrees base?

Yesterday, 11:10 PM	#1
jollymon02 Junior Member Join Date: Jun 2021 Location: Fort Worth, TX Posts: 49	TBI motor tuning Hey all, I have a TBI motor running a aftermarket EFI and mild cam. I'm working to get the tuning sorted out. I currently have an HEI distributor with vacuum advance, but have the option to change for a billet and let the EFI handle the timing control, which would make it more like an upgrade from the factory air/fuel delivery. My immediate question is where should I set the base timing, 0 as factory, or more like a typical SBC 8 degrees base?



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