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Turbo experts: which gt-40 is this?

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Old 10-28-04, 07:50 PM
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nyt
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Turbo experts: which gt-40 is this?
so, just for my own curiosity, what is the trim of my gt-40? I can't find any pictures that really match it

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Old 10-28-04, 08:44 PM
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sorta looks like a gt42
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Old 10-28-04, 08:53 PM
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it's not a 42. its a 40, even has 40 stamped on the side =]
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Old 10-28-04, 09:18 PM
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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
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Old 10-28-04, 09:20 PM
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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?
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Old 10-28-04, 09:23 PM
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It's on my car, dont feel like taking off the compressor housing
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Old 10-28-04, 09:52 PM
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found this picture, shows a different blade then mine with the front labeled .58
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Old 10-28-04, 10:05 PM
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Thats the one I got, on that note sean, what is the wheel diameter for this turbo, is it a 67mm?
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Old 10-28-04, 10:21 PM
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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
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Old 10-28-04, 11:18 PM
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All your new pics show GT40R's not GT40's
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Old 10-28-04, 11:28 PM
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so? Isnt the only difference the cartridge? The blades/housings should be the same, no?
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Old 10-28-04, 11:48 PM
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Originally Posted by nyt
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
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Old 10-28-04, 11:52 PM
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I'm going to call precision in the morning and try to find out. wish there were some markings on it
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Old 10-28-04, 11:59 PM
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Originally Posted by nyt
so? Isnt the only difference the cartridge? The blades/housings should be the same, no?
Oops, nevermind.
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Old 10-29-04, 12:20 AM
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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.
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Old 10-29-04, 12:24 AM
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I still dont know what trim it is (88mm .72a/r or 82mm .58a/r) if it even is one of those
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Old 10-29-04, 01:58 AM
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you still haven't gone out to your garage and checked your a/r
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Old 10-29-04, 09:49 AM
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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.
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Old 10-29-04, 12:45 PM
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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.
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Old 10-29-04, 12:49 PM
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Originally Posted by MFilippello
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
Mike 61.83 converts to 52 trim by Garretts math.

-Sean
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Old 10-29-04, 08:41 PM
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the one i posted was a 50 trim with 84 trim wheel
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