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  1. #1

    Default 400 to 450 program upgrade

    So has anyone actually done the mythical 400 to 450 "program" upgrade on the ECU without paying the dealer like 6k? Any how to's? or Lesson's learned?

  2. #2
    Join Date
    Jun 2012
    Location
    Knoxville TN
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    1,415

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    Quote Originally Posted by JohnJWilson22 View Post
    So has anyone actually done the mythical 400 to 450 "program" upgrade on the ECU without paying the dealer like 6k? Any how to's? or Lesson's learned?
    Nope. Rumors only on the ECU flash.

    If you are running something like 2018, you might get more from a reprop.
    2018 Supra SL400

  3. #3
    Join Date
    Apr 2018
    Posts
    150

    Default 400 to 450 program upgrade

    The rumor was 400 to 440 is an ECU. You can’t buy a 440 ecu unless you have a 440. Dealers won’t do it and can’t do it.

    48 HP and 23 ftlbs wasn’t worth $7000 on a Supra.

    Most of the HP increase comes from a higher redline.


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    Last edited by Larry Arizona; 06-11-2020 at 05:38 PM.

  4. #4
    Join Date
    Aug 2019
    Posts
    27

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    I'm pretty familiar with LS based motors. They are tuned very well from the factory in most forms so I doubt there is 50 HP hiding in that ECU. Quite sure the 450 has a larger cam and or slightly better flowing heads to get to the higher HP rating. Plus, its the same 6.2 liters so you're only going to feel any power difference above 4000 rpms where our boats dont spend much time. Torque is the answer in boats and more displacement whether in cubic inches or forced induction is the only way to increase that. Have a great Fathers Day weekend Supra fans!

  5. #5
    Join Date
    Apr 2018
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    150

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    Quote Originally Posted by Hanso24V View Post
    I'm pretty familiar with LS based motors. They are tuned very well from the factory in most forms so I doubt there is 50 HP hiding in that ECU. Quite sure the 450 has a larger cam and or slightly better flowing heads to get to the higher HP rating. Plus, its the same 6.2 liters so you're only going to feel any power difference above 4000 rpms where our boats dont spend much time. Torque is the answer in boats and more displacement whether in cubic inches or forced induction is the only way to increase that. Have a great Fathers Day weekend Supra fans!
    The 450/460 is a 93 octane tune and likely some internal upgrades over the 440/450 variant that is still 89 octane tune. I doubt there are internal differences between 400 and 440


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  6. #6
    Join Date
    Jan 2018
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    20

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    400 and 450 are torque ratings. The hp is in the 300s.

  7. #7
    Join Date
    Apr 2018
    Posts
    150

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    400: 350hp 404 ftlbs base engine
    440:398hp 427 ftlbs in 2018 $7000 option
    460:410 hp 452 ftlbs $8580 option
    575: 510hp 580 ftlbs $20740 option


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