Needs a turbo blanket and a better wastegate I think. That turbonetics has a small diameter inlet I guess. Still looks pretty good overall and as long as there is no boost creep it will be no big deal.
I would guess you just have a poor tune. THe altitude considerations should be minimal at best and not cause misfires. This is a A/F issue I bet.
Get a wideband on it when you can.
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Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
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