being not very technical - how do i tell the turbo size/model from either measuring or model numbers.
i know it's a garrett on a 2wd saff but have been told it doesn't look standard.
beside the 'garrett' name is A/R 4 2.
thanks

 

Measuring the inlet hole inner diameter is a good indicator. This should be of the same size as the compressor wheel inducer diameter. The exducer diameter will be same for all T3. The trim = sqrt(in./ex.)*100 is garrett's way of sizing the different T3 compressor wheels ranging form 35 to 60 (and super-60). 2wd T3 had a trim of 50 or 55...

 

http://www.melett.com/pdfs/Garrett/Garrett%20T3.pdf

page 6 has the compressor wheel dimensions.

 

thanks jesse - sorry about the late reply !