How do you measure trim and A/R???

[kpc_0721]

Hey I bought a turbo about a month ago and the person I bought the turbo from didnt really know much about it so I was wondering how I can measure trim and a/r? Its a Airesearch t04 and I cant really find any info on it anywhere so any help on it would be appreciated.

[turbo2nr]

on the turbine and compressor housing its stamped it in. its usuall .6_something comp. turbine can range form .48-.86+...

[myRed240]

Try this: http://www.turbobygarrett.com/....html

[kpc_0721]

I know the a/r on the turbo itself but there is nothing on the compressor and I want to know the trim size of the turbo but it dosent say anywere and I really have no clue how to tell what the trim size of the turbo thats why im trying to see if there is a way to measure it?

[C-Kwik]

The trim is just the ratio between the area of the major and minor diameters of the wheel in question. The answer was in the link provided by myred240 a post above yours. It even gives you a simple equation...