We’re thinking the same thing and I asked my brother for a picture of a new valve.ProPower engines wrote: ↑Mon Nov 02, 2020 3:45 pmcan you post a pic of an unused new valve??Rick! wrote: ↑Sun Nov 01, 2020 7:48 pm Has anybody experienced this type of failure before? What's the root cause - fatigue or...?
598 BBM Dragster engine
2.35" diameter steel intake valve
Isky solid roller cam
.750" lift
284/294 @ .050
About 300ish# on the seat, 800ish# on the nose, has PAC springs but I forget the PN.
72-7300rpm engine
about 1200 laps
Just curious what the chamber side of the valve head appears like before damage takes place.
A little more digging and I think the intakes are only Manley Race Series and they should be the Severe Duty version. (4X UTS over Race Series)