Originally Posted by miatamania (Post 73647)

huh, found this on the miataprotege forums:

http://www.msprotege.com/forum/showp...3&postcount=36

"I should have clarified a little more. The turbo used on the MSP definitely
shares the same wheel combination as the off the shelf GT25R catalog item,
meaning both turbine wheel and compressor wheel combinations are the same
(same size and same trim). There are a couple subtle distinguishing elements
between the MSP turbo and the off the shelf GT25R that set them apart, but
not in term of performance (power). One, the MSP turbo has a slightly
different compressor housing to accomodating the specific intake/intercooler
plumbing requirements for that vehicle. The other thing is one of the
components (either turbine wheel, turbine housing, or other CHRA component)
is of a slightly different material than the standard GT25R and carries a
different (higher) temperature rating. This could have been something done
to meet the OEM specifications for the turbo application, I don't know reason
behind it.

Aside from that, we have provide replacement CHRA's for that turbo and the
CHRA is the same one used on the off-the-shelf GT25R."

-Coming from a Garrett person :)