Valve overlap

west coast · 01-26-2017, 11:53 AM

Adger I have been using that page a lot of great info there.The issue i am having now i think is in the black science of designing cams that is not printed. like when to open and close valves during the stroke, how much lift during overlap, lots of variables roller versus flat tappet cam, engine stroke. I am looking to improve what i have, I have identified an issue over a year ago and looking to solve it. So understanding valve overlap and a standard on what lift and if it is tappet or valve is important with the issue I have.

Dale one other thing about the new BOSS block is it has different size head bolts also.

01-26-2017, 11:53 AM	#11
west coast Senior Member Join Date: Dec 2008 Location: Rainy Washington Posts: 609 Likes: 12 Liked 223 Times in 73 Posts	Re: Valve overlap Adger I have been using that page a lot of great info there.The issue i am having now i think is in the black science of designing cams that is not printed. like when to open and close valves during the stroke, how much lift during overlap, lots of variables roller versus flat tappet cam, engine stroke. I am looking to improve what i have, I have identified an issue over a year ago and looking to solve it. So understanding valve overlap and a standard on what lift and if it is tappet or valve is important with the issue I have. Dale one other thing about the new BOSS block is it has different size head bolts also. __________________ James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023