Longer titanium valves and rocker geometry.

[jsf74]

My Predator head has larger diameter and longer titanium .5mm valves. When bolting my champion rockers on it looks like i need to shim them up approximately .300 to get the proper geometry. Any issues with this or am I missing something.

 

[flattop1]

That's a big shim . The possibility of it coming loose or rotating is a concern .
The shim would need too be perfectly flat .
Shorter pushrods would that cause rocker too retainer clearance problems ?

 

[jsf74]

That's a big shim . The possibility of it coming loose or rotating is a concern .
The shim would need too be perfectly flat .
Shorter pushrods would that cause rocker too retainer clearance problems ?

Not clearance problems but a awfully steep angle from valve tip to pushrod. Worried about side loading valves with heavy springs.

 

[bpoirier]

How much longer are the valves from stock? I'd think if you had to shim up the pedestal the same amount or so. I know when I do some of my animal stuff the pushrod end is usually lower than the roller tip by about 7-10 degrees.

 

[jsf74]

How much longer are the valves from stock? I'd think if you had to shim up the pedestal the same amount or so. I know when I do some of my animal stuff the pushrod end is usually lower than the roller tip by about 7-10 degrees.

Ill have to measure the angle but don’t think im any more than that with only 1 shim. Maybe im concerned about a problem I don’t actually have.