Quote:
Originally Posted by Dougal
You need a turbine map or the turbo fitted to another engine and the result scaled to pick when it's going to spool.
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Do you know of any data published that I can use? I've asked for this before but nobody has replied to this specific request.
Quote:
Originally Posted by Dougal
Garrett in their new catalogue produce turbine maps which show the mass flow required to get the turbine working.
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Does their catalog cover the older models, like the used ones I'm likely to source, or just their current product line?
Quote:
Originally Posted by Dougal
The compressor maps are only useful for knowing what rpm the turbo has to do generate that boost and the efficiency at that point.
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Ok, but to be specific, and I think you are best trusted to know this, there is data available (flow rate, turbine speed, absolute pressure, turbo efficiency) that could be used for extrapolating the spooling chacteristics of a given turbo. I presume the intake geometry, intake tract volume and other variables would have to be estimated, but isn't there valuable published data like the moment of inertia for some turbos published to estimate responsiveness and spooling given certain assumptions?
I'm pressing in on this area of selecting a turbo for the exact same reason as Tapage: I wish to install a DIY that does not dissapoint. Dougal, I don't intend to badger anyone. Please read this post as an inquiry. If you say it's a black science in this area and there's no emperical data, that's fine. I'm just looking for the limits of what's known.
Cheers,
Rick