how much torque do you typically lose i know you cant have real number but how about a guess

 

you won't "lose" torque, that's physically impossible unless you drastically change the timing. You'll move your torque "curve", or where the engine makes torque. typically with all breathing mods (header, exhaust, intake, etc) it moves it up, I'm going to guesstimate 10-30% (ie, if you were making 150 ft lbs of torque at 2500 rpm, with ITB and header you might make 150 ft lbs at 4000). Just a guess, but probably pretty close with most four cylinders I've played with (nissan sr 20, dodge srt-4)

 

yea i was gonna do it but i scrapped the idea because i couldnt really figure out the DBW or the MAF, i got a lot of info from some friends, and some of my instructors, but nothing that made me feel confident about it,

oh and i think that if someone can pull this off they would pass the SC guys and for less money (if they do it themselves)

i would how ever PAY for someone to make a bolt on kit haha.