common misconception that ball bearings make a difference to spool. they dont. the fact that the whole turbo is a new design, the housings and blades, is much more influential than the most obvious marketable difference, the ball bearings.
both turbonetics and garrett make turbos up to and past the 2000hp point, so the 'biggest' turbo for a car is whatever you specify.
sound performance in the states will sell you a turbo for a supra with up to 88mm inducer which will flow over 1500hp, and make over 1000hp at the wheels through an auto box on a dynojet dyno.
diesel turbos are not ideal for performance cars because they are configured for high pressure, into a big diesel engine which turns 2000-2500rpm and makes only maybe 4-550hp. contrast that with a turbo like the greddy T88 (IHI/misubishi turbo), or T51R SPL (garrett turbo with housings cast for hks in japan) which is designed to flow similarly high pressure, but over 1000hp.
the requirements are very different and finding performance is not simply a matter of putting a large turbo from a big engine onto a smaller engine.
Sat, 17 May 2003 09:47
