Board index Flathead Power-Technical Questions, Answers, and Suggestions K-Models k model valve seats

k model valve seats

Moderators: Curt!, Pa

Post Mon May 11, 2009 6:41 pm

Posts: 139
Location: USA
In contemplating the use of a 1 7/8'' intake valve on a K Model at first glance it looks like the 1.875 valve diameter is so huge that it would essentially eliminate the relief area between the intake and exhaust ,it appears that a new valve seat may be in order.Now I have the '' 45 Performance" book by Jeffrey Diamond which is the best technical book written on 45's and I am assuming the valve information would apply to the K Model but this may be my mistake.When you guys install the big 1.875 intake valve are you installing a new larger valve seat,and how deep are sinking the valve.Also I was thinking about running a standard 3 angle valve,any comments and guidance would sure be appreciated. :D :D

Post Mon May 11, 2009 7:06 pm

Don't use any bigger valve than you need to get the seat cleaned up, and don't sink it at all.

Post Tue May 12, 2009 4:59 am

Posts: 323
Location: north central Ma.
Try never to sink the valve you loose low lift flow and shrouds the the back side.

I've not done my valves yet on my K but plan on cutting the seats to clean and having valves ground to fit. My plan is to try and not put in seats if at all possible.

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