ID: T25 or GT2554R? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-14-2012, 08:32 PM   #1
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Default ID: T25 or GT2554R?

Got a turbo from a Noble M400/M12.

Was told it is a T25. But internet says it could/should be a GT25R/GT2554R. Pic on ATPturbo looks identical to what I have.

Round compressor intake, 3bolt outlet. normal gt25 turbine housing. FM downpipe bolted right up with no grinding/ovaling the holes like I read that needs to be done with non BB.
M24 .86 a/r on compressor, .64 a/r on turbine housing
chra tag is gone. no built in oil restricter and the oil inlet is the normal reverse flare.

what can I look at to determine if this is BB or journal?

2nd, where is a good resource to find out what parts I can swap/upgrade? IE turbine housing to V-band or use the FM ewg housing, but swap it in the future to a gt28r ect... (what is compatable)
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Old 06-15-2012, 10:23 AM   #2
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Look at the number of bolts holding the CHRA to the turbine housing if there are 6 around its a BB, and if there are 4 it is a Journal Bearing.
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Old 06-15-2012, 11:45 AM   #3
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Quote:
Originally Posted by fwMiata View Post
what can I look at to determine if this is BB or journal?
spin the compressor.
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Old 06-16-2012, 02:22 AM   #4
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Quote:
Originally Posted by duffbuster243 View Post
Look at the number of bolts holding the CHRA to the turbine housing if there are 6 around its a BB, and if there are 4 it is a Journal Bearing.
6. yeaaah babay.

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Originally Posted by Braineack View Post
spin the compressor.
oh it spins like butter.
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