Cory9584

what is a kkk 10cm equal to in a t4? How about for an 8cm?

special tool

In flow or ratio?
You have 2 major considerations there.
I have held the 10 up to various t4's and I can tell you that it is a little smaller throat size than a .58 - closer to a 40 size T4.
The ratio of the #10 is about a .63.

gt37vgt

there is a crossover table posted on a couple of turbo talk threads here recently

Porschefile

The #10 is a little smaller than a Garrett T3 .63a/r housing. Overall, the K26 series housings are similar in size to Garrett's T3 class.