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

**Vero67** · 04-08-2015, 04:48 PM

My bet would be on the performance cam. On my 56 210, I need to run a vacuum pump and canister for my brakes. If you can figure out the cam, the specs should tell you the expected vacuum.

04-08-2015, 04:48 PM	#16
Vero67 Senior Member Join Date: May 2013 Location: Vero Beach FL Posts: 299	Re: Low Vacuum? With good compression? My bet would be on the performance cam. On my 56 210, I need to run a vacuum pump and canister for my brakes. If you can figure out the cam, the specs should tell you the expected vacuum.