ID a T3/T4

[nolany87]

I know someone that says the turbo he has is a T3/T4 turbo, 0 miles on a rebuild and it is clean as heck, all nice and shiny looking. The reason that I am asking this is because I know absolutely nothing about turbos, how to look at one, or even how to read what it is. Can someone please inform me on how to identify a Garret T3/T4 turbo and what the numbers on the turbo mean. It would be appreciated, Thanx a lot.

 

[GSX4LIFE]

The Numbers on the housings simply state what the housings are. For instance, a .50a/r on the compressor housing, denotes a TO4B compressor housing. A .60a/r is a TO4E housing. And .70a/r is a TO4S housing.

Numbers on the turbine housing will most likely say .48, .63, or .82 if it's a standard 5 bolt housing. This is simply size of the housings.

The wheels, the more important part, are not stamped anywhere on the turbo. you would have to remove the housings and physically measure the wheels to find out what you have. You could post a pic, and some of us may be able to identify the wheels by sight.

 

[nolany87]

thnx for the info. is there any way though to tell that it is a T3/T4 turbo, Does it say Garrett? What exactly does T3/T4 mean? thats what i was really looking for but the type of T3/T4 it is helps as well.

 

[marshall]

The Numbers on the housings simply state what the housings are. For instance, a .50a/r on the compressor housing, denotes a TO4B compressor housing. A .60a/r is a TO4E housing. And .70a/r is a TO4S housing.

incorrect, the a/r has little to do with the compressor family, for instance - T04E housings can be had in .50, .60, and .70 a/r's

if you want us to help id a turbo you need to give pics and measurements, otherwise get friendly with google

 

[GSX4LIFE]

Hahaha. Ok skipper. If you want to argue semantics your correct. Now go out in the real world and check out some housings. Look at any PTE, AGP, SBR turbo with a .60a/r housing. Thats a standard E compressor housing. Oh, and if you opt for the TO4S, look whats printed on the side of every one you will get from any of these distributors. Thats right. .70a/r. Im trying to make things easy for to understand. Fludding him with details like yours at this point isnt going to help him.


So thank you for the insightfull correction that the letters of the housings are actually denoting a specific compressor family. Funny, though, how more 60-1 compressors are fit in T04E compressor covers, when most people believe they should be(and are often found) in the larger .70a/r TO4S covers, when in actuality, it is a B compressor wheel.
thank you also for being so helpfull and informative to the original poster.....Oh wait a sec. You werent at all. You merely thaught you had an opening to descredit my knowledge. Anything else you would like to explaine to me?

 

[DSM90AWD]

^^^ sorry I'm late my orig post never posted

incorrect, the a/r has little to do with the compressor family, for instance - T04E housings can be had in .50, .60, and .70 a/r's

Hmmm.. then why then does Turbonetics list wheel-trim (bore size) as the only difference in each of it's Compressor Housing "families"?

For turbine housings I agree as Turbonetics lists numerous A/R sizes within each Turbine Housing families.

 

[nolany87]

Another question, I ended up with a Garrett AiResearch T3 turbo. The guy i bought it from got it from a friend and the friend said he did a rebuild on the turbo. The guy I got it from is going to ask his friend if he has the receipts, to see if it was a stock rebuild or a T3/T4 rebuild. Now, more than likely, the only thing im going to get for this turbo is a 6bolt block and crank, he said he is skeptical about the head and cams with the block.

 

[DSM90AWD]

Was there a question

 

[nolany87]

Sorry, I left the question out. Is there any way to identify if a T3 turbo has a T3/T4 rebuild? or is a T3/T4 rebuild even possible on a T3 turbo.

It is a AiResearch T3 Garrett turbo from a 1983 Mustang SVO.

 

[DSM90AWD]

Sorry, I left the question out. Is there any way to identify if a T3 turbo has a T3/T4 rebuild? or is a T3/T4 rebuild even possible on a T3 turbo.

It is a AiResearch T3 Garrett turbo from a 1983 Mustang SVO.

I had an '84 SVO back in the day
The stock turbo was a straight T3 which was pretty small (small 16Gish in power), so may not be such a good deal after all especially if has a 5-bolt turbine housing which would necessitate a custom O2 housing

 

[GSX4LIFE]

Yeah, not such a good deal. Sounds like you got suckered on this one.

 

[nolany87]

its a .60 compressor with a .63 4-bolt turbine