What happened to the Stainless 5-Blade S366SX or S363SX you replaced the 5-Blade s472 with. What could have happened to make you go back to a turbo that you only ran for a few days and pulled it out.
I may have you beat on turbo changes on a single truck though. As much as I love the turbo I am running, there is a well known company that is going to make a custom turbo out of a Garrett 42 series CHRA and either modify a larger compressor wheel to a smaller size or make an entirely new compressor wheel that is quite a bit smaller. They won’t tell me, but they are known for being able to reliably do these kind of turbo mods.
The smallest turbo that can make the HP you want, without blowing hot air and creating excessive EGT’s, is always the best. The G42-1200 I have, will never see 1200hp it is capable of, at least not anytime soon, the GTX4294R was awesome up to 800hp, but looking for 850-900hp. If they do release the turbo I mentioned, which they claim will spool super fast compared to my G42-1200, which I think is pretty good, as is, I would give it a shot.
If Borg ever released a S469SXe or S470SXe, possibly with a smaller 83mm turbine, it would be awesome for the over 850hp daily drivers, that still might want to tow at elevation on occasion. Lighter wheels and dual ball bearings makes for a big difference on Garrett turbo’s.