I was thinking about getting a bigger throttle body after I rebuild my supercharger. I was wondering since it is a forced induction motor, it is pushing more air threw the TB so if I go bigger would it be easier for the air to pass threw? Also, if I would get one, which size? I have seen 52, 58, 80, 90 mm TBs.

 

For an LT1 you can't go for the 80 or 90mm TB, they're for LSX applications. That said, you don't even want to screw with a 52mm TB. Do you know how much power you're pushing? You really don't need a new TB until you're making around 350+ RWHP. If you do decide to go with a new TB get the 58mm and you need to get the front of your intake manifold ported to match.

 

58mm is plenty of air supercharged or not, arizona speed and marine makes a single blade tb if you want to go that route like the lsx