I dont own a x12, but i do own a rb c12 turbo(3 port). I have to say the engine is strong. I amazed me at first. When comparing it to my sts mt12 i find the rb had more rpms. I think so anyways. My sts is a nice mill. My rb was ran with a cvec pipe and it used to 4 stroke at max rpms when leaned out a tad. It's a real shame that i over heated if for about 1.5 gallons. It was my fault, since i didnt know how to tune correctly. IMO, i think the x12 would be capable in just about any race with the right driver and set up.
Course-r, what is with the sound level or pressure limit you are refering to? I also would like to know how you are suppose to measure such thing. I been in 2 for over 2 years and know alot but i never heard about that. Well, if i did, it went in one ear and out the other.
