The 3.5 is no joke, high-14 1/4 mile times. Considering the Crossfire runs 15.1-15.2 stock...

Regarding the horsepower guesses, one must remember that the initial tuning for the turbo was to be done by Kleemann, before some pencil pusher in one of the companies decided against that partnership. Kleemann was the company that provided the contact info to Corky. So the boost pressure and tuning was originally set to mimic that of the Kleemann intercooled blower.

This is copied from MB-World, a site with a few Kleemann-charged M112s...

Those numbers are right in line with the figures on Kleeman's website (331 HP/326 lb/ft torque). Those are flywheel/crank figures, NOT RWHP. A Kleeman kit on a V6 doesn't make as much HP as the C32 AMG motor since it runs at lower boost from the higher compression ratio of the NA M112 motor. You will make more RWHP with a manual than an auto transmission. On a 3.2L NA motor, you will probably get around 270 RWHP. Most C32 AMG dyno at 270-290 RWHP.

This kit will be fun on a W203 with 6spd MT, you'll probably need to reinforce the transmission though.

Given the increased efficiency of the turbo, you *might* see another ~10 RWHP @ 5,800 RPM. Torque curve will be impressive but not nearly as immediate as you'd get with a supercharger. Think "hill" versus "plateau". The turbo will have an advantage over the supercharger in the terms of IATs, so the HP shouldn't taper off in the last 200 RPMs like the supercharged motors do.

Since Eurocharged Houston location is sorta close, I would recommend the car be taken there for the final dyno. He runs the heartbreaker dyno which is far more realistic, and he has experience in putting the N/A Crossfire on the dyno with no issues pulling up to redline.

If Kleemann only squeezed out 270 RWHP, the estimates of 310+ are optimistic at best. Especially since Corky is retaining the stock silver airbox,,,