[SOLVED] Turbine Wheel / Shaft questions

cjmr2t · Tweet this Post! #1 (**permalink**) 09-17-2010, 03:37 PM

Hello...

I just picked up a used (pretty old) T3/T4 46 trim Stage III unit. Only payed $25 for it cause it has a ton of shaft play...

My questions are:
1: without pulling it apart can it be determined if its a standard shaft or big shaft unit? Im thinking its a standard shaft because of its age for one and cause I also have a T4 62-1 BB unit on another car of mine which has a P-trim turbine and the threads (compressor end obviosly) are larger on the 62-1 unit that I have. I also have an old mustang SVO T3 - 60trim unit here which has the same size threads as the T3/T4 I just got so my assumption is that the threads are different between the Standard shaft and big shaft wheels.

Second, The wheel has rubbed on the housing and now the Exducer diameter of the wheel is measuring 2.203" so .026" overall has worn off from rubbing the housing. Barring the condition of the bearing journal surfaces, would this wheel / shaft be considered resuable or should I just look into getting a new wheel / shaft regardless of the journals?

Thanks in advance,
Chris

cjmr2t · Tweet this Post! #2 (**permalink**) 09-17-2010, 05:47 PM

Ok, this turbo has me kinda stumped now!!! Maybe I have a F1-57 wheel and not a T3 stage III wheel.

After a bit of surfing the forum, I cam to realize that original T3 wheels were 11 blade where as the F1 wheels are 10 blade and the wheel on this turbo is a 10 blade..

What adds to the stumped part is that the stage III wheel is said to have a 2.559" inducer where as the F1-57 wheel is said to have a 2.555" inducer. The wheel I have meauses 2.557" on the inducer so dead smake in the middle ( 2 thou smaller then the Stage IIII and 2 thou larger then the F1-57).

I can see that it would easily gain 2 thou of carbon build up so maybe it is a F1-57 wheel. Does anyone know the exact measurements of the tip heights of both a F1-57 and a Stage 3? Then I could compare it wo mine which measures .354" (9mm).

Oh, I forgot to mention in the original post that the serial number sticker is gone from the back plate (which is a blue anodize one by the way).

cjmr2t · Tweet this Post! #3 (**permalink**) 09-17-2010, 06:07 PM

Ok so the plot thickens......

I just pulled the turbine housing off the Mustang SVO turbo I have here... This turbo is original stock (except for the turbine house)....

Did the Garrett T3 wheels have a larger tip height cause the SVO turbo I have with a stock Stage 1 (garrett) wheel has a tip height of .452" (11.5mm) as compared to the .345" height of the other turbo....

Robert · Tweet this Post! #4 (**permalink**) 09-18-2010, 02:32 PM

So it sounds like you have a standard shaft unit. The blue back plate was used to identify standard shaft turbos. The big shaft should be 5/16" in diameter btw. Unfortunately there are no parts left for the standard shaft models. As in none. Seals, bearings, wheels, etc . All the spare parts have been used up so unfortunately I dont think there is much you can do with that