[Tim Corcoran]

Silly me, I was going to have the spring seats machined. I took my heads to my machinist to have them machined and walked out with a set of +.050 valve locks. I'll put them on the exhaust valves only.

[Skip Fix]

those usually work just double check rocker still contacts valve tip seem retainers it moves up too much.

[Jack Gifford]

Originally Posted by steve25

... There’s only one way to correctly answer that...

I would say that only the designer of the cam profiles can correctly answer the spring force [not "pressure"} questions. Values such as peak negative acceleration aren't usually available to end users.

[Tim Corcoran]

Originally Posted by Jack Gifford

I would say that only the designer of the cam profiles can correctly answer the spring force [not "pressure"} questions. Values such as peak negative acceleration aren't usually available to end users.

The designer of the cam is gone now but, Bullet knows Ultraydyne cams as well an anybody . Tim at Bullet worked for Harold for several years. Bullet highly recommended to run 1.65 and they recommended the springs too.

[Tim Corcoran]

Originally Posted by Skip Fix

those usually work just double check rocker still contacts valve tip seem retainers it moves up too much.

Yeah I already check the clearance and it's good. My machinist made the same recommendation. Thanks