Just in case you haven't seen this up yet, Zane Schwenk uploaded a pic of the Corvette ZR-1 and Cadillac CTS-V supercharged 6.2L engine in a boat. I'm assuming xstar. Here's the quote from Zane:
"Maiden voyage with the new LSA 6.2 Liter super charged. Sounds awesome"
The tune in the ZR1 is 640 hp, tune in the CTS-V is 556. Nothing released yet as far as I know on how much power the mc tune is.
another quote from Zane today:
"Awesome engine I was so inspired to try some new tricks cause we were able to LOAD the crud out the boat...WOW."
Just thought I'd share my findings for the day.