Hobao Hyper TT tuning

I spent the afternoon at my local, indoor clay track tuning the Hyper TT.  It's now driving WAY better than the stock setup.  Note that that these changes are for indoor clay on slicks, it's probable that a looser surface would require a different setup.

I got rid of the front swaybar the second day out, and this time I ditched the rear swaybar which made the truck come alive.  It does roll a bit, but I'm now running pretty stiff springs, and you need that roll to generate traction.  With the rear swaybar, the only way you can get the car to drive is to huck it into a corner and slide the rear around, but that's really not the best way to go about driving.

The stock setup has really soft rear springs, and overly firm front springs.  The front damping is actually pretty close, but the rear damping is too firm.

What I'm currently running is Black Losi 2" front springs, and Blue Losi 2.5" rear springs.  Front shock oil at Associated 30wt and rear oil at 27.5wt.  Guys in the past apparently were running 25wt in the rear, but I found too much movement and it was pretty unbalanced running 30/25.  30/27.5 is much better.  This shock package makes for a more composed, balanced, and stable vehicle.

Shock package:

• Front:  Losi Black (LOSA5135), Associated 30wt oil
• Rear:  Losi Blue (LOSA5160), Associated 27.5wt oil

The other main issue with the truck is that it pitches forward and back way too much.  The stiffer springs and shock oil help, but I ended up moving the rear arms back 1 spacer (1mm) which lengthens the wheelbase a little bit and keeps the truck more stable.  I also added 1mm less droop in the rear from full extension which keeps the truck from pitching forward so much under braking.  So I'm at full droop front (no limiters) and 1mm less droop in the rear.

The other area I spent some time developing was my electronics package.  Normally I run cheap $50 Hobbywing Justock ESC's, but this Hobbywing SCT Pro I'm running has a lot more adjustments than I'm used to.

Changes I made to the ESC:

• Coast is at 10% (up from 0)
• Braking at 75% (down from 100)
• Punch at 6

The Hyper TT tends to nosedive when you let off the throttle, but the Coast % smooths the off-throttle setting which keeps the truck more flat through the air.  This is the first ESC I've had with this setting, and it definitely helps smooth out the truck and the way it flies.  Highly recommended if you have the adjustment.

The last thing I did was replace all of the steering bushings with bearings and add a 1mm TLR ballstud washer on top of the posts.  For some reason, the top screws like to back out, I'm hoping this alleviates it a bit.

Overall I found the truck has a fair amount of slop and movement, but you just have to trust it and muscle it around and ignore the fact arms, hubs, and wheels are moving around all over the place.  It will stick.  It always drives better on power -- even in the air, a tiny bit of throttle keeps it stabilized and flying flat.

I still broke a rear arm and that ended my day, and I also forgot to get the dogbone, so I'll be upgrading to rear CVA's this week.