imaware that it is the measuremnt of the wheel, but how do you convert from how many inches it is, to the trim number??probably a stupid question, but im still tryin to learn a little, haha. thanks

 

like for example, if a turbo is a 50 trim, is that a 50mm wheel? im lost and i tried searching, but no luck

 

does anyone know this in here?? man, so many people with turbocharged cars in here and no one knows what trim is? i have a turbo from an 82-84 saab 900 2.0 8 valve model number tb0321 and just want the specs on the turbo, it is a .42 a/r compressor housing, and .63 a/r exhaust housing, but thats about all i know, does anyone know anything else about this turbo??i am curious as to how much power this will make and if it is right for my setup! i have searched a whole lot for it, and found nothing, thanks techies!!!!