Custom Brake MOD for 15€ | Thrustmaster T3PA

Discussion in 'Sim Racing Hardware' started by Giovaneveterano, Dec 28, 2017.

  1. Giovaneveterano

    Giovaneveterano

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    I'm a happy owner of a Thrustmaster T300 for a couple of years now, it's an awesome wheel for the price, but I never felt satisfied with the brake pedal of the T3PA, it just feels wrong: the stock metal spring is too soft and gives almost no resistance in the first centimeter of travel, later when the pedal hits the black conical rubber the brake output jumps all the way up to 100% within few millimeters. The brake feeling is NON EXISTENT.

    Thanks to these Xmas holidays I had some days free, so I decided to build my own brake mod with a small amount of money. My key point were:
    • have a decent force to apply right from the start
    • longer pedal travel than with the conical rubber
    • better brake feeling close to 100%
    I ended up with this:
    brake mod.jpg
    1. 2 shock absorbers for RC cars (https://goo.gl/i6BpFc 18x100mm, holes 4mm, 14€ shipping incl.)
    2. A Scooby-doo to tie the two abs together
    3. L-screws for wood (3mmx30mm, 0.20€)
    4. A piece of soft rubber I found under the sofa
    5. Galvanized steel spring (1.7x18x30mm, 6kg (60N) at full compression, 0.50€)
    And here's why it works better than the stock one (way better!):
    • The steel spring (5) gives a good resistence as soon as I press the brake pedal, while the two shock abs (1) have a more progressive feeling right to the end of the travel. Be sure that the steel spring goes on full travel just before the shock abs, so that the extra force doesn't go on the thin L-screws (3) but on the stock metal bracket that's designed by Thrustmaster exactly for that.
    • The thin black rubber, glued on the stock metal bracket under the spring (5), soften the shocks given by the pedal at full travel on the spring (5) and on the stock metal bracket.
    • The stroke is longer, but the force required is pretty much the same I used to apply with the conical rubber, so that modulate the brake input close to 100% it's definitely easier.
    I'm sharing this because on RaceDepartment we always help each other and this time I'd like to improve some else's sim-racing experience.
    Here's a quick demo of it around Laguna Seca with a Mercedes AMG GT3:

    (yes, I know, I should have avoided these horrible socks :p)
     
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  2. Ken Bell

    Ken Bell
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    Brilliant idea and job.
    Wish I could be creative like that. I just got the conical thing and its just rubbish.
    Nice one @Giovaneveterano
     
  3. Giovaneveterano

    Giovaneveterano

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    With this cheap update I instantly started to trailbrake with ease. The conical rubber makes everything harder.
     
  4. Scottbed

    Scottbed

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    I posted directly to you but wondering how you keep the spring in place? I found a 6.8kg spring on Amazon....I think that will be ok. Great idea and post! Thanks for sharing.
     
  5. Giovaneveterano

    Giovaneveterano

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    You mean the spring #5?
    I simply glued it on top of a piece of black rubber (#4) that it's glued again on the Thrustmaster metal plate. Glue like the SuperAttack is fine, it's stronger than the rubber itself.

    Be sure that the #5 spring has to go at full travel before the #1 dampers. So when the brake pedal is fully compressed all the force is going through the stock metal structure. Otherwise you'll put all the force on the tiny screws #3 and they'll break.
    #1 dampers should never ever go at full travel. Check that, it's crucial.

    I suggest you to buy the springs from a physical store, find the right one it's easier and cheaper.
    IMG_20180310_194648_143.jpg
     
    Last edited: Mar 10, 2018
  6. Neilski

    Neilski
    Staff Premium

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    Fair enough, but if you stamp on the brake pedal really hard, it will move very quickly and that will still create a large force on the damper mounts. If the force they can exert is significant relative to the spring, then surely you'd need a beefy mount for them too? (This logic is leading me to suspect that the force they exert is pretty modest...)
     
  7. Giovaneveterano

    Giovaneveterano

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    Correct. First, these are RC-car shock absorber so the dampening from each is quite low, plus the spring mounted on them is not very stiff.
    That's the reason why I used 2 softer dampers instead of 1 stiffer, to spread the force on more screws.
    I'm using this setup since Xmas with no problems, I'm very happy about it and I would never go back to the conical mod. The next step could be new pedals, but that's another story.
     
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  8. davehenrie

    davehenrie

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    Perhaps a video showing how you assembled everything. Very Interesting project you have there.
     
  9. Giovaneveterano

    Giovaneveterano

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    Latest update: I added an additional spring to the throttle pedal and now it feels amazing! It's way easier to modulate the throttle on corner exit.
     
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