just a question... if your hood Vented? like on top at the windshield... I think that would help out along with the mod to evacute even more heat out of the engine bay along with your "ram air" cooling ... alot more air being forced into engine bay ... .... hood venting also has some aerodynamic value on FWD cars in particular the air pulled out from under the hood (and some that would normally go under the car) channeled over the car... sort of a cheap vacuum effect on the nose ... engine bays with poor air evacuation suffer from "ballooning" of the nose at high speeds... just a thought
you'll prolly see a lil bit of improvement out of that but it'* the process of supercharger that makes the most heat.. I think what ever 10-15 degrees cooler the TB might get will be lost after it'* heated in the */C
however any improvement for $10 is damn good compared to how much the after coolers cost.
just my 2 bits