Do you know what the valve guide clearance was set at when the heads were built?
What valves are in these heads? Were the valves purchased separately from bare heads or were these the valves that came in the assembled version from EQ?
I can’t remember the exact clearance when I measured them. I have it in my notes, I can check later when I get home.
I bought the heads used from someone that got them from Valley Performance in Michigan and never ran them. I called the shop, and the owner was great. Told me what springs he used (Hughes 1110 and hardware), and said the guides had been reamed since they are tight from EQ. They are 2.02 valves and stainless, so assuming ordered bare and the shop built them.
When I talked to Hughes, they said I was gambling not running guides. I figured the factory didn’t so would be ok knowing the guides were fit. I do know stainless picks up on other metal easily so maybe that is why.
Engine did run on an engine stand for like 3 heat cycles and likely did 10 pulls on the dyno plus idle time. It was idling after we bumped the timing up a couple degrees for more testing when the valve stuck.