Failed Rocker Arm

JRapley said

Summit Racing 'Applications' tab shows the following:

Installed Height (in): 1.600 in.

Seat Pressure at Installed Height (lbs): 113 lbs.

Open Height (in): 1.150 in.

Open Pressure (lbs): 280 lbs.

I don't know if this is correct. I could always confirm with the manufacturer.

Click to expand...

If those specs are correct then you might actually have too weak of springs for that cam and might be getting some valve float or weird valvetrain harmonics which will definitely destroy rockers. You've probably figured out by now but you always want to use springs with the same pressures as those spec'd by the cam company, weird stuff happens if you don't.