The Ford Barn - View Single Post - 1955 F-100 5.0L timing

5851a · 12-02-2021, 06:03 PM

I've had trouble in the past with some cars using manifold vacuum. Get everything set at idle and then you put in drive, rpm drops and then vacuum drops that pulls the advance down and that drops rpm further. I just seem to have better luck using the ported vacuum. All my carbed Fords came that way from the 60's to the 80's. Just my experience. Try it both ways and see which suits your engine better.

12-02-2021, 06:03 PM	#15
5851a Senior Member Join Date: Oct 2014 Location: NE Iowa Posts: 1,665	Re: 1955 F-100 5.0L timing I've had trouble in the past with some cars using manifold vacuum. Get everything set at idle and then you put in drive, rpm drops and then vacuum drops that pulls the advance down and that drops rpm further. I just seem to have better luck using the ported vacuum. All my carbed Fords came that way from the 60's to the 80's. Just my experience. Try it both ways and see which suits your engine better.