Wednesday, March 29, 2017

Hyper TT front-mounted shocks

I spent a few hours at the track testing some stuff.  The initial plan was to work on my B64D, but I also wanted to test the plastic steering knuckles on the Hyper TT, so I started with that kit.

(Boiled) plastic knuckles held up great, and removed a lot of slop, so I'm going to stick with that and just keep extras in my parts box.  I also tested 10k rear diff oil and 5k, still not sure which I like best.  10k gives more forward traction and stability, but loses a bit of steering.  7k is probably going to be perfect.

But I tested out one change that made a MASSIVE improvement in the handling of the TT --



I noticed the Hyper TT has a ridiculous amount of rear toe-in (probably 4 degrees or so), and that the arms add about 0.5-1 degree of toe-in.  My theory was that this was adding a lot of push into the car.  So I flipped the arms around, and mounted the rear shocks on the front of the arm.

Bing blang blaow, this added a SICK amount of corner speed.  The truck enters the corner with way less push and rails through the corner much better.  You need to add 2mm of spacing on the shock mount (I used a TLR ballstud spacer), and you'll want to mount the rear arms all the way forward (spacers all in the back) because the hubs are moved back when they're flipped.

What this modification does is a few things:
  • reduce rear toe-in (main thing I was after)
  • forward mounted shocks, which centralizes the mass better.
The only downside I see is that the body doesn't fit right over the shocks, so you'll have to trim the covers on the shock towers from the body.

Try it, I think you'll like it.

2 comments:

  1. Thanks for the tip. Could you please explain your boiling part procedure? I want to do it on some of my Hyper 10SC parts.

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    Replies
    1. Hi Brian,

      I just boiled some water in a pot, and then threw in the plastic parts for 10 minutes, and removed and let dry. That’s pretty much it. It seemed to soften the plastic and make it less brittle and more flexible, so I think it makes them more likely to survive a crash.

      Hope that helps!

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