can any one tell what size this turbocharger is: Aireserch04; A/R .50. thanks

 

aireserch builds turbos too?? :dunno: they make hella stuff for aircraft

 

yes they do. i think they and garret became one company now.

 

There's no such thing as an "AiResearch04" turbo. They use the standard Garrett nomenclature so it could be a TO4 that you're talking about. Is this out of a catalog or something?

 

AiResearch automotive turbochargers is owned by Garrett. they use standard Garrett sizing nomenclature.

older turbine compressors may still be found with "AiResearch" stamped on the compressor housing.

the turbocharger you have is a T04 compressor with a .50 area to radius ratio. as for the turbine's specs, it should be stamped on the turbine housing.