Dollar

I recently bought a turbo, and it is from a Fiat Coupe 20V Turbo. It's an old Air Research T28 (Just a Garrett from the stone ages), and it's got a .42 inducer and a .49 exducer. Now, I've never hear of a .49, only a .48, so does anybody have any experience with this turbo on any SOHC engine? It's probably going to be the same as the .48, but after a few similar turbos on the same engine, each one with mild differences changed the way the car drove in a pretty big way so I'd like to get some first hand experience.

Thanks.