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Maximum Power From Gtr With Stock Turbos

Topaz

By Topaz,
in Engines & Forced Induction

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Topaz Grand Master

Topaz

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Yours is the first RB25 I have heard of going twin turbo. Did you perform and post diagnostics to find out why and how it blew?

I turned my controller down to 40% duty rate of the valve unit. Does anyone have a Profec B and can tell me what sort of PSI that would give me?. I think at about 50% it was slightly under 1bar.

GTRgeoff Grand Master

GTRgeoff

Posted
Posted

That's something that will be hard to near impossible to discover. Could be a piece of dislodged carbon flaked off and struck a hot turbine blade. Mine isn't the first for RB25 sure, but i had the time to put into doing the job properly with plenty of prep and port matching. Cost a bucket load too and that was doing it myself.

Certainly wasn't heat shock as I ran the car for over an hour before driving to check for any leaks, satisfy that fluids were flowing properly and burn in the heat wrapping.

I have heard of one GTR that was started on a cold morning and driven fairly hard straight off shattering a turbine, so is an indicator of heat shock susceptibility.

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