Nothing against it, just dyno numbers to back it up. :p
Besides, I'm guessing that valve size is more of an issue with naturally aspirated motors because forced induction is 'forcing' the air through.
edit: I'm not sure if the 450HP motor is forced induction or not. I think that if you are going to move more air then you need a bigger hole.
I remember T Haines saying the same thing, that a 3L wont breath well with just the 2.5L valves. Now I know that SHO Shop used stock valves and got 228 HP with tons of other intake modding and exhaust system stuff. They are the only ones that I know of that have had that good of luck with the stock 2.5 valves. I don't know of anyone else that broke 200 wHP with stock valves. They may have done so because they made sure that their valves were the ONLY restrictive part in their engine.
Not to argue with Duttweiler or anyone else, but Facts speak louder to me than words, and there are several 3.0 projects here now that give a wealth of information. The fact that is practically shouting out at me from the dyno results is that the motors with the bigger valves make more power.
warmonger
