[Hanguk87]

Originally posted by drift



actually, the "B" designator only describes the type of housing used and trim.

they have T4, T04, T04B, T04D, T04E... all are T4 series, which all utilize the T3 bearing housing, but have a larger compressor and exhaust trim over the T3 turbines. different OEM's require different setups to work efficiently with their motor, so they use the letter designator to differentiate minor differences to the housings and wheels.

there are very few stock ballbearing turbos. they're usually converted with a new cartridge assembly. most good turbo shops can convert an existing T3 bearing housing to accept a ballbearing cartridge for a couple hundred bucks, or you can buy one preassembled.

the only Garretts that i know of with ballbearings would be the Garrett/HKS GT series turbochargers.

Damn! Thats kinda complicated. So..................... which Turbo??? or ball bearing or whatever?!