The Ford Barn - View Single Post - Manifold vacuum at idle... vs without...interesting observations

tubman · 01-18-2021, 03:48 PM

The prevailing theory with the SBC guys is that ported vacuum is better for fuel economy while straight manifold vacuum is better for power.

01-18-2021, 03:48 PM	#15
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: Manifold vacuum at idle... vs without...interesting observations The prevailing theory with the SBC guys is that ported vacuum is better for fuel economy while straight manifold vacuum is better for power.