It's easy to blame the turbo when a sled doesn't run. Most of the time it is an issue with the components not associated with the turbo kit. Polaris uses 50 cent relays, crappy wiring, tps that goes out of spec. Most likely you have metal against metal banging some where giving false det readings. You might be over revving. Could be numourous things not concerning the turbo kit.
After installing and tuning a number of turbos over the last 2 years, I’d have to agree with this. Every time one of them doesn’t run right it’s almost always sled related, not turbo kit related. Either something was installed wrong or something is broken. I had 7 friends this year that bought left over axys 800. Had a shop in Idaho install sidekicks on all of them. Second ride out one of them started running bad, pulled the side panel to find all the bolts holding the exhaust to the turbo housing had come off. Another sled, they forgot to tighten the charge tube clamp. Another sled broke and exhaust cable, and another had relay failures. Broken clutch springs and on and on and on. By the end of the season just about everyone of them had had a “did not run right” issue at least one or twice. None were turbo kit related.
I would trust any of the major turbo kits out there, Silber, boondocker, MPI, etc. they are very good and very reliable these days.