Has anyone with a 112 Magnuson upgraded to a 122? What did it cost? Did you have to ship the entire blower to Magnuson? Was it worth it at the end? How much more power did you get from all this? Are you running the blower with the stock pulley?

We had an 05 CTS-V come in with a Maggie. He wanted to go with a 402 so we did that and put the Maggie back on. It made exactly 1 PSI of boost with the same blower setup as before the 402. We upgraded the MP112 to a MP112HH and proceeded to break 600 RWTQ by 2000 RPM at 11 PSI boost.

So the MP 122HH would be killer with a forged engine. But they now have the TVS series in a 2.3L blower. Might want to check that out as well.

Is that about the max amount of boost that is available from a Maggie...11 pounds?

Needed a bigger crank pulley to get more boost out of the Maggie on that application. We had a 2.8 pulley on the maggie.