What are the good things and the bad thing of this turbo? I am looking into buying one fast for 635. I heard they make more power than the vf 30-34. Its a bigger housing what do you guys think? thanks

The good thing about the VF22 is that it's the biggest VF series turbo and cheapest. The bad thing is that it's the slowest VF turbo to spool up (400hp+). If you want mid-top end and don't mind a little bit of lag, this is the turbo to consider. This turbo is also the oldest design. I am going with the VF34 (375hp+) because it spool up faster and it's a newer design...

Basically, like wickedrex said, in a nutshell-

Pros- big top end power (if you have good exhaust and fueling)

Cons- lag and high boost threshold

thank you. i am thinking of buying one.:D

how about for an STi? would the extra displacment pic up on the VF22 lag any? I was thinking of a VF34 but not sure if this would be the best upgrade on an STi:confused:

The VF22 would lag less on the STi than on a WRX, but it wouldn't be a huge improvement over the stock turbo as far as top end.

so how would the STi VF 39 compare with the VF30/34? is there any IHI turbo worth upgrading the STi to?