urban_cowboy

I will take a look at them and see if they will show me anything. The hardened valve lash caps are pretty tough so they do not show wear much at all. When the valves tips failed last spring, they horseshoed (made a trench) as the rollers wore or smashed into the soft valve tip material. The lash caps corrected that issue, but then the rockers went.

So, 210/520 springs will not keep the slack out of the valve train during normal street driving? I could certainly see how lack or valve float could slam the material enough to break it, but I am only spinning up to 7000.

cprstreetmachines

The higher RPM actually helps it rebound better, keeping slack out of the valve train.
210/520 is a good bit up there. But even "small" rollers make power because of their ramp rates, and the ramp rates even with small lift is what is hard on parts. Personally if it's not floating up top, keep the pressures the same and get a GOOD rocker.

urban_cowboy

I am not seeing any valve float up top. The motor peaks in the high 5000 and low 6000. It does drop off in power some from 6300-7000 but that is in the range of the intake and cam. Even though this is a cross over engine (race and street) I did not want to go with a hydraulic lift b/c I am spinning it above 6k. Odd that spinning high is easier on parts...that is hard to get used to. I guess I will just have to keep the rpms above 3500, which is more fun for me .

cprstreetmachines

Well, not easier on parts, Just enough to keep the valve train tight. But with good rockers, you should be fine. This is one of the reason the backside of the cam is easy closing.