The Ford Barn

61Klassic · 11-07-2019, 05:07 PM

Hi all.
I’ve just spent a few hours this evening mocking up some stock Chevy Manley 1.6 valves with my Potvin 425 cam. I’ll be using stock non adjustable lifters so was measuring to see what valve length would be closest to get the desired lash.
One bank is spot on with a bit of grinding for the 4.911 length.
The other bank will require 0.040” longer valves.
I knew they were offset but not by that much?
What did they do from the factory? Grind the valves on one bank a lot more?
How far can you grind valve tips before going through the hardened tip?

Thanks everyone
Kev

11-07-2019, 05:07 PM	#1
61Klassic Member Join Date: Jul 2019 Location: Kent UK Posts: 35	8BA Valve length Hi all. I’ve just spent a few hours this evening mocking up some stock Chevy Manley 1.6 valves with my Potvin 425 cam. I’ll be using stock non adjustable lifters so was measuring to see what valve length would be closest to get the desired lash. One bank is spot on with a bit of grinding for the 4.911 length. The other bank will require 0.040” longer valves. I knew they were offset but not by that much? What did they do from the factory? Grind the valves on one bank a lot more? How far can you grind valve tips before going through the hardened tip? Thanks everyone Kev