I have a 09 Lancer Gts , and i was thinkink of upgrading my Throttle body to 70-90 mm throttle body that i can find on ebay. Do u guys think its a wise or somewhat reasonable idea?

 

wrong section...70-90mm is crazy...I've only seen that size with custom intake manifolds and and a MASSIVE turbo, on like 800hp cars. Speed density is also probably the way to go, since your throttle body cross-section will dwarf that of your MAF housing/pre-turbo flow capacity, so it might be kinda pointless otherwise.