2500km Old rb25det Highflow Turbo Died, Possible Cause Of Failure?

[rolls]

Well it isn't an rb20 turbo anymore, it would flow substantially more than a stock rb25 turbo. After speaking to a few turbo manufacturers I believe that the difference is so minimal that after boring the housing/ports out it will be negligible.

It has bigger wheels, ports, housings, garret ball bearings, it will flow much better than a stock 25 turbo. The question is how much worse than a 25 highflow. Yes it does have slightly smaller wheels, but when you combine all these factors I'd imagine it flows a large amount more than a stock rb25 turbo.

From my seat of the pants dyno before it died I would say it was EASILY making 220rwkws. You would never see this with a stock rb25 turbo, and I have been in my fair share, not to mention it made good power to 6 (rev limit at 6k) and felt like it would make a dickload more if the rev limit was increased (wasn't dying off).

Remember 15psi only = 15psi on the same motor and turbo, as soon as you change either of these it doesn't mean anything. Note how 15psi on a 2L motor = ~7psi on a 2.5L motor, the PSI is just a measurement of restriction, it doesn't relate to airflow unless you know the specifications of the motor.