Me and a couple of my buddies have been having this discussion for a while now, and I want you guys to put in your opinion and end it once and for all. I own a 03 Evo VIII with a perrin catback, AVC-R, GReddy Type-S, and ACT clutch. If a bigger turbo, say a T-4 was put on it, would there be significant horsepower gains? Not a turbo kit, But a turbo itself. I honestly dont know. Bigger CFM could mean bigger gains, but running the same boost? (20 psi) I need help dispelling the myth. Thanks guys! Whoever helps gets a virtual on me!

 

Yes, a bigger turbo will make more power at the same boost pressure as long as that boost pressure is within it's "efficiancy window" on the compressor map.

Keith