so, just for my own curiosity, what is the trim of my gt-40? I can't find any pictures that really match it

 

sorta looks like a gt42

 

it's not a 42. its a 40, even has 40 stamped on the side =]

 

Measure the compressor wheel

88mm with .72 a/r is 54 trim

There are other sizes but you most likely have the 54 trim. Check your a/r

 

It is either a 50 or 54 trim wheel, the 50 trim will be 82mm exducer 54trim will be 88mm exducer. Is there a A/R?

 

It's on my car, dont feel like taking off the compressor housing

 

found this picture, shows a different blade then mine with the front labeled .58

 

Thats the one I got, on that note sean, what is the wheel diameter for this turbo, is it a 67mm?

 

ok
so more pictures i found
first heres one of my turbo:





here are some pics i found, labeled as i found them

GT40,42R

GT40,42R

 

All your new pics show GT40R's not GT40's

 

so? Isnt the only difference the cartridge? The blades/housings should be the same, no?

 

No the 40r's have different compressor wheels and different trims. Since I was just talking to sean about this yesterday, I can include this here.

Sean, my inducer size is 61.83 it seems. Measured it today while I had the cover off for my piping work. Is this the 52 trim or the 56 trim?

Mike

 

I'm going to call precision in the morning and try to find out. wish there were some markings on it

 

Oops, nevermind.

 

AS mike said they are different in trims and sizes from the GT-R lineup as another note you cannot fit GT-R wheels on GT shafts.

 

I still dont know what trim it is (88mm .72a/r or 82mm .58a/r) if it even is one of those

 

you still haven't gone out to your garage and checked your a/r

 

How am i supposed to check my a/r? its not printed on there and it's a royal pain in the *** to remove the compressor housing how its setup.

 

If it is not that important to you don't worry about it, if it is you are going to need the comp cover off to verify.

 

Mike 61.83 converts to 52 trim by Garretts math.

-Sean

 

the one i posted was a 50 trim with 84 trim wheel