09/06/2026
“The Garrett spools faster, holds more boost up top, and the back pressure is lower.”
Earlier this year, Daniel Hume switched from a 8385 setup to a Garrett GXR45-82 and immediately saw an increase in boost pressure up top, as well as improved spool.
Previously, the S13 had been 4.68 @ 153 mph in the 1/8-mile with its old 8385 turbocharger, but the setup had reached its limit at 51psi of boost and was simply maxed out. After upgrading to the Garrett GXR45-82 (very similar in size to the previous setup), tuner was able to push the same engine combination to 55 psi, resulting in an increase to 1,239 WHP, from the previous 1,153whp (see chart for comparison of red line being the old turbo and blue being the GXR).
Daniel reckons, the Garrett setup delivered the kind of changes racers look for when evaluating a turbocharger swap: “The Garrett spools faster, holds more boost up top, and the back pressure is lower.”
Even more impressive, the GXR45-82 was turned down (8psi less) below what the previous 8385 setup had run at full tilt, yet the car still went 4.71 @ 153 mph, meaning the GXR was already right there while being run more conservatively, on an engine that was four years old with rods that had been in service for six years. 🏁🚗💨
🚗: Daniel Hume
👨💻:
✅ XBoost Technology helps increase power and performance
✅ Up to +29% more compressor flow compared to G-Series
✅ Improved pressure ratio capability for higher boost pressure..
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☎️ FREE CALL: 1300 TURBOS
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