anyway of finding out what the specs on a turbo are? (i.e. trim, a/r) is it marked on the turbo housing? or do you just have to be seasoned boostologist? thanks

 

the numbers should be on the housing
.48 .42, .63 etc

 

lots of numbers but nothing close or anything that makes sense. sorry im new to this ****.

 

If you want to identify the trim of the wheels you take the housings off. After that with dial calipers measure the base of the wheel then the "tip" of the wheel. These measurements measurements will fall into the proper equation to find the trim size below.

compressor wheel:

(inducer * inducer) / (exducer * exducer) (100)

turbine wheel:

(exducer * exducer) / (inducer * inducer) (100)

 

what?

 

If you look at the exhaust flnge on the turbo there should be 2 numbers stamped the sides. One on the exhaust side and one on the compressor side.

Give those numbers in relation to the sides and we can figure it out for you. Usually there will be numbers also stamped on the compressor housing and exhaust housing such as 60 A/R and .48 A/R.

 

I love that formula, its so fun to say out loud....