We bolted the new Blouch 20G-XT turbocharger to our STI, and rolled it back onto the dyno for some more pulls. The turbo delivered as advertised. Spool was a little slower than the Tomei ARMS turbo we had on the car before, which is understandable given how much larger the turbine outlet is on the 20G-XT. The car made a lot more horsepower at the same boost levels -- 33 more hp and 30 lb-ft of additional torque to the wheels. An added benefit that isn't seen on the dyno graphs is that off-boost throttle response is better -- the more wide-open turbo outlet probably is the reason. The exhaust note is a bit louder now, too!Tuesday, April 13, 2010
Blouch 20G-XT on the car
We bolted the new Blouch 20G-XT turbocharger to our STI, and rolled it back onto the dyno for some more pulls. The turbo delivered as advertised. Spool was a little slower than the Tomei ARMS turbo we had on the car before, which is understandable given how much larger the turbine outlet is on the 20G-XT. The car made a lot more horsepower at the same boost levels -- 33 more hp and 30 lb-ft of additional torque to the wheels. An added benefit that isn't seen on the dyno graphs is that off-boost throttle response is better -- the more wide-open turbo outlet probably is the reason. The exhaust note is a bit louder now, too!
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3 comments:
Does the 20G-XT have the 7^2 or 8^2 housing? Had a friend that moved from 7 to 8, definitely noticed an increase in lag.
It's an 8cm2 housing. 7cm, from experience, is going to be a good bit more responsive at the low end, at the expense of a little top-end horsepower.
What kind of gas mileage are you seeing now with all these power upgrades?
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