How to properly measure the compressor wheel to determine the size of the turbo?

[THE RAVEN]

We have numerous turbos without any description as to what size they are. How can we determine the size of the compressor wheel using a caliper which reads mm. ?...T.I.A.

 

[Tri fans]

Before you worry about Turbo size, you should get rid of that Kenwood system. I've seen coffee tables smaller than your AMP.

 

[Intercooler]

Measure the compressor and turbine wheel in mm's and count the number of minor and major blades. Good luck! See gnttype.org for more info.

 

[THE RAVEN]

Intercooler, thank you for your reply and your referral. I will follow your advice and your link.

The Raven.