Havent done it but you're heading for >23psi and Hi IAT's and injector/pump issues. Shortened engine life...etc....ie: limits unless....
.... you drive in the arctic or can pull and additional 20kW ( 70,000Btus) heat out (stock cooler does 10-15kW) or..... don't rev over 3000rpm....;>)

Looked at it myself.....
my calcs suggest 27psi at 6000rpm with 65/185 - I think SC eff drops off and others were getting 22psi
I think I came to the conclusion - get over it and if I cant - Buy and SL55 and pulley that for 550hp.

There is a thread...search "stacked".....
Steve (32_Krazy) and I think (Grip_Grip)...have done it ...Steve (now porsche) still drops by every now and then.

Sorry If I'm preaching to the converted....just noticed your #posts....