Lexus LS400 Single Turbo Dyno Test Results

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

Here is the dyno result from DynaPack 3000.  The result is pretty interesting and lots of tunings required.  I ran extremely rich.  An average AFR was 10.4 from boost to redline.  I have the complete data sheet.

Therefore, I can slowly tune my car cell by cell.  Here are the corrected hp with 12.42 psi.  With more fine tuning, this car can be in the mid 400 rwhp with the given pressure.

I was little disappointed with the results.  My Tial 40mm spring was 14.7 psi, but at dyno, it only 12.42 psi.  Now I need to get an electronic boost controller.

Secondly, I was hoping the hp would be higher, but only high 300s.  Fine tuning is a must.  I have 6 pages of AFR with psi and other data so I can preciously correct every cell.

As you can see, because my car was running so rich.  It bogged using the lower rpm and the dyno tech was slowly increase rpm.  That is why u see the boost comes on very late.  With proper tuning, the boost will come on very fast.

Secondly with an EBC, full boost will be much quicker to reach.  From some of my friends with FI 1UZ stating with leaning out I would gain about 40-50 rwhp.  I cant wait until that day.

Dyno Condition:
Date: 04-26-2005
Gear: 4th
Wheel Diameter: 614.7mm
Drive Ratio: 3.47
Tran C Factor: 1.2
Car Wts: 4200 lbs

Dyno Results:
Max Torque: 509.4
Max HP: 389.4
Max psi: 12.42 psi
Comments: Good Run, Extreme Rich

Note: Yellow was the second run and Green was the three run.  We aborted the first run.

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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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