| I was laughing about these because they're about the worst you can get. It seems that whoever designed these turbos made every mistake in the book. Just about everything seems thrown together with no regard to reason. Clipped wheels? From Garrett's webpage: [ http://www.turbobygarrett.com/turbobygarrett/kits/basics_turbospeak.html ] Clipped Turbine Wheels When an angle is machined on the turbine wheel exducer (outlet side), the wheel is said to be ‘clipped’. Clipping causes a minor increase in the wheel’s flow capability, however, it dramatically lowers the turbo efficiency. This reduction causes the turbo to come up on boost at a later engine speed (increased turbo lag). High performance applications should never use a clipped turbine wheel. All Garrett GT turbos use modern unclipped turbine wheels. And here is Bernie's post:
[ http://www.twinturbo.net/net/viewmsg.aspx?forum=technical&msg_id=839668 ]
Cliff's Notes: The Sport 500's have stock like spool and decent power. The TD05-18G has big power, but big lag. The T28's have Sport 500 like power and TD05-18G like lag.
 |
