I know the pt81's are a lot more lift than these, just trying to prove a point. Some people ran them without issues, some did have issues... BUT, they are significantly higher lift @ tdc than mine.
Mine were timed in with a dial gauge @ 112/112, spec by catcams.
I've been on to Chip Wizards, he said he has a customer who's run two rallycross seasons on a xu10j4rs motor with stock lifters at 8500rpm, and no issues....
JP
oh and also, while I think on... it's logged over 30 hours dyno time during development / testing...
Mine were timed in with a dial gauge @ 112/112, spec by catcams.
I've been on to Chip Wizards, he said he has a customer who's run two rallycross seasons on a xu10j4rs motor with stock lifters at 8500rpm, and no issues....
JP
oh and also, while I think on... it's logged over 30 hours dyno time during development / testing...
JP