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Explain some nomenclature to me real quick...

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neat

Member
Joined
Sep 27, 2005
Messages
273
I've read 'Maximum Boost' and have a decent understanding of how turbos, pressure ratios, and intercoolers work; but I don't understand some of the lingo.

For example, a TA49-

I assume the 49 represents the size of the impeller wheel, in MM. Where is it measured at? The widest point, IE closest to the center housing?

What does the TA signify?

On a TE44, I assume that's a 44 MM compressor wheel. What does the TE mean? I would think the exhaust side would be almost as important as the compressor side, how do you determine the specs on the hot wheel?

A/R is the distance from the wheel to the inner side of the housing, right? What does A/T stand for? Where is it measured? At the largest point on the wheel?

A T3 VS a T4 turbo? What does T3 or T4 signify?

Is there a website that explains all this stuff?
 
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