Thread: 18G-XTR Dyno
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Old 02-14-2012, 11:28 PM   #67
Scooby Specialist
Member#: 72345
Join Date: Oct 2004
Chapter/Region: TXIC
Location: Arlington, Tx
Sold 05' CGM Wrx &
08' AW FXT :(


The big difference in the turbos are the turbine wheels; the regular XT has the Mitsubishi TD05 journal bearing and the R version has the Garrett ball bearing. The Blouch rep claimed that the Garret Turbine wheel was larger than the Mitsubishi, and regardless of the R being ball bearing, it wouldn't spool faster. This didn't make since to me since they are both rated at 430hp on Blouch's site. Being Ball bearing, shouldn't the R spool faster versus the regular XT considering they have the same potential power? What's the point of having both turbos?

Since Blouch couldn't guarantee me that the R would spool faster, I decided to go with the proven results of the regular XT. It's a fantastic turbo with great off boost response, spool and pulls all the way to redline. Cobb said I was leaving 20hp on the table leaving my stock intake and stock sti muffler. I'm very happy .

18G Alone:

Stage 2 overlay:




18G-XT 8cm
2011 Sti Top Mount IC
AVO Turbo Inlet
TXS Catted Stealthback
Sti Muffler
ID 1000cc
Walbro Pump

Cobb is working to get my graph (and dyno video!) on their dyno database. Once they do I'll upload a graph that's easier to see, I hate the mustang dyno print outs.
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