Garrett GT Turbo Compressor Maps For Lexus-Toyota V8 Engines

LEXUS 1UZFE MODS FORUMS - Post Questions Here For Quick Answers!

Garrett claims the GT series turbos are much better then the old school T series.  They claim the GT turbos will spool about 1,000 rpm lower then the previous generation.  Here are the Specs of each turbo and compressor map.  I also included the 1UZFE to 3UZFE Airflow.

Here are the Air Flow Chart for the UZFE:
Here is the spread sheet of 1UZ to 3UZ Air Flow Chart

Here is the Specs of GT Turbos:


Garrett GT Turbos

Compressor Specs CHRA Turbine Specs
Max. Rated HP Part No. Wheel Dia. Wheel Trim A/R Ratio Bearing System Wheel Dia. Wheel Trim A/R Ratio
130 GT-12 41mm 50 .38 Standard 35.5mm 72 .43
220 GT-15 45mm 60 .48 Standard 41.2mm 72 .35
260 GT-20 56mm 55 .53 Standard 47mm 72 .46
280 GT-22 52mm 60 .51 Standard 50.3mm 72 0.56, 0.67
280 GT-22 59.41mm 52 .42 Standard 50.3mm 72 0.56, 0.67
320 GT-28R Call CALL .6 Ball Bearing 50.3mm 62 .64
500 GT-30R 76.2 mm 56 .6 Ball Bearing 60mm 84 CALL
520 GT-32 71, 76mm 52 .5 Standard 64 mm 73 .78
660 GT-35 71, 76mm 52 .50, .60 Standard 68mm 84 1.18
680 GT-35R 82mm 56 .7 Ball Bearing 68mm 84 0.82, 1.06
700 GT-37 76mm, 82mm 52 .54, .70 Standard 72.5mm 84 1.12
750 GT-40 82mm, 88mm 50, 54 .58, .72 Standard 77mm 73, 84 0.94, 1.34
1100 GT-42 94mm, 102mm 53, 56 .6 Standard 82mm 84 1.15
1100 GT42R 94mm, 102mm 53, 56 .6 Ball Bearing 82mm 84 1.15
2200 GT-60 141mm 56 1.05 Standard 130mm 84 1.47

To match the perfect setup for your horse power
needs.  Just match the above air flow chart with the
approperaite engines and the boost u want to run.  The
airflow (Text in Red) and pressure ratio (Text in Blue).
The Pressure Ratio is on the right side of the chart and the
flow rate at the bottom of the map.  For example 8 psi is
your goal for the 1UZFE (SC400, LS400 or Crown). Here is your
air flow and pressure ratio:

Pressure Ratio:39.08
Air Flow for 1UZ @ 8 psi:1.54 

To learn more about “how
to read compressor maps

Here are the compressor maps:

Do you have any questions? If so, please head over to the forums to get a quick answer or share your experience!

This is a freelance site with no support by huge companies.  I have been doing most of the R&D and technical write-ups by myself with my personal money and literally thousands of hours of my time.  I have taken extra steps to demonstrate in details how things are done.  Currently I am one of the few people doing Lexus V8 research and performance enhancement.  This effort comes from my personal love for this wonderful engine.  Most of the modifications are from trial and error. There's no cookbook for 1UZFE mods and its unknown territory for much of supercharger performance.  The parts, labor, web development and site hosting are 100% paid from my personal hobby money.  If you feel my efforts help you in any form, please do not hesitate to donate any amount of money to support this site. You have no idea how much I and the entire Lexus and Toyota community appreciate it!

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