Ok...I'm an idiot...

Back to the question then...
What do these numbers mean: 62/70 62mm compressor wheel, and what, a 70mm turbine INDUCER. (meaning the exducer is smaller than that.)
62mm inducer on the compressor wheel would have a larger Exducer number.
70mm inducer on the turbine wheel, would mean a smaller Exducer number.
 
70 is a 12cm exhaust housing size, 80 is a 14 cm housing, a 62/70 has a 62 compressor wheel, a 12cm exhaust housing, with a 65 exhaust wheel, unless you get them upgraded
 
Smokem said:
I was assuming the 0.70AR and 0.80AR were the denominations. For your example, the compressor would be 62mm inducer/85mm exducer. The turbine would be 74mm inducer/65mm exducer. This using the method I gave earlier would be 85/62(100) or 73-trim for the compressor, and 65/74(100) or 88-trim for the turbine. Different turbine wheels have different attributes such as blade count and pitch, this will dictate the flow and spooling characteristics of the wheel. For instance, the BW 65mm turbine wheel is 11-blade, and the 68/71/73mm turbine wheels are 10-blade.
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:bang:bang:bang:bang:bang:bang:bang:bang:bang:bang:bang:hehe:
 
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