[kenikh]

Main issue with big Garrett's is they prefer water cooling - this is what they are designed for. They spool fast and make great power, especially the twin scrolls. But therein lies the bugaboos:

- You should really add a small radiator and water pump for these turbos.
- Twin scroll turbos need a true equal length exhaust that segregates the exhaust gas streams from the two cylinder banks all the way up to the turbo. If you don't, you lose the twin scroll benefits gained from stealing efficiency from the evenly timed exhaust pulses.

Doinf it right requires a lot of work and cost that removes the cost benefit of using a "less expensive" turbo.