ok, well ive narrowed it down to a T3/T4, but other then that i have no idea what the hell my buddy just bought, its a garret turbo, .50 a/r on the compressor side, .63 a/r on the turbine side.. just wondering exatly what turbo this is, if its a to4b,e,fu.. you get the point.. he got it for 400 bucks, brand new.. any help would be great.. thanks..

 

Take a pic and post it up.

 

I did some earching for Garrett T3/T04B but I didn't find any. Maybe it's a T3/T04E with a 50 trim, 0.60 AR comrpessor? Some measurements would help. Like compressor inlet, outlet. Outer diameter of the compressor cover. Measurements of the turbine might help too like the size of the outlet. Whether it is a 5 bolt or 4 bolts, etc.

You could try comparing it with the turbos on this page:

http://store.yahoo.com/cheapturbo/gatu.html

 

4 or 5 bolt? what do you mean?

 

the compressor housing looks like the t4/t04e turbo..but its basically the same as the t3/t4e turbo from the link you sent me

 

Which pattern does your turbine match? Your turbine should match one of the two patterns, unless it's something odd like a V band flange or 3 bolt flange (rare).

Click this to see what a 5 bolt flange pattern looks like

Click this to see what a 4 bolt flange pattern looks like

If you want to know for sure what size trim compressor you have remove the compressor cover by unbolting the 6 bolts from the backside of the compressor. Measure the outer diameter of the compressor wheel and then measure the inner diameter of the compressor wheel. Post up the measurements on here and I can help you calculate the trim. Or you can follow the instructions in the Garrett link. If you dont wanna bother with all that then you can just assume you have a 50 trim turbo. You said 0.50 ar but AFAIK T04E housings only come in 0.60 AR. The trim sizes go from 60, 57, 54, 50, and I think 47 too. Trim size can calculated if you have accurate measurements of the compressor exducer and inducer.

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