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Old 12-21-2016, 08:46 AM   -   Wikipost
R/C Tech Forums Thread Wiki: Kyosho Ultima RB6 & RB6.6 Car Thread
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Last edit by: tobamiester
RB6.6 Kyosho America Product Page: http://www.kyoshoamerica.com/ULTIMA-...T_p_24505.html

RB6.6 Manual http://www.kyosho.com/jpn/support/in...A_RB6_6_IM.pdf

RB6.6 Kyosho Youtube https://www.youtube.com/watch?v=vW_sR667utY

MSRP $639 MAP $399.99

-------------------------------
New RB6.6 parts (compared exploded views, prices and links are Kyosho America):

Chassis:
  1. Main chassis - UM731 - $125.99
  2. Side guards - UM732 - $9.99

Battery Holder:
  1. Battery plate - UM733 - $8.99
  2. Battery foam - UM741 - $7.99

Rear Bulkheads:
  1. MM3 and Laydown - UM740 - $9.99
    • MM3 bulkhead
    • Laydown bulkhead
    • Swaybar Holders

3 Gear Transmission (MM and RM):
  1. Transmission - UM734 - $10.99
    • transmission cases
    • spacers
    • caps
    • plastic FR & RR suspension hangers

  2. Gear Cover - UM735 - $6.99

Laydown Transmission (3 and 4 gear possible):
  1. Transmission - UM736 - $10.99
    • transmission cases
    • spacers
    • caps
    • required extra hardware
    • pastic FR suspension hanger

  2. 40T idler - UM737 - $6.99
  3. Motor plate - UM738 - $18.99
  4. Gear cover - UM739 - $6.99

Body:
  1. Blade body - UMB05 - $27.99

Optional Parts:
  1. Lightweigt Blade body - UMB05LW - $31.99
  2. Aluminum FR suspension hanger - UMW705B - $28.99 (may be able to file UMW705 to fit)
  3. Brass FR suspension hanger - UMW725B - $30.99 (looks more different than UMW725..someone confirm?)

Typical Upgrades for new RB6.6 Buyers

UMW701 Aluminum Steering Plate (RB6)
UMW702 Aluminum Crank Arm (RB6)
UMW704-0 V2 Aluminum Rear Hub Set(0/RB6)
UMW705B Aluminum Rear Sus. Holder (RF/RB6.6) or brass UMW725B
UMW707 Aluminum Rear Sus. Holder (RR-Mid)

Nice to have:

UMW723 Aluminum Front Sus Block (Type B/10g/RB6/RT6/SC6).


Aftermarket Parts:

Front Wing: https://www.prolineracing.com/perfor...mount-alum-rb6

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Old 12-23-2014, 05:34 PM   #11356
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Anyone have a pic of the prototype front tower on tebo's car?
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Old 12-23-2014, 06:45 PM   #11357
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Quote:
Originally Posted by Speedychris22 View Post
Anyone have a pic of the prototype front tower on tebo's car?
This is a good shot.

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Old 12-23-2014, 08:06 PM   #11358
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What does moving the front plastic collar spacers, from the inside of the front spindle to the out side of the front spindle?
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Old 12-23-2014, 08:06 PM   #11359
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Quote:
Originally Posted by Kraig View Post
This is a good shot.

Looks the same, it does look taller. I wonder what effect will this give
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Old 12-23-2014, 08:43 PM   #11360
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Originally Posted by Speedychris22 View Post
Looks the same, it does look taller. I wonder what effect will this give
There is no scientific proof to this thought but let me toss this out there. With the taller shock tower you have to regain the ride height that was lost. So that would mean you screw the collars down on the body farther. When that happens it pushes the shock shaft down and that means the piston is now also farther down in the body too. Now with the piston farther down in the body I would think that this would create more pack in the front of the car.

At least, that is my non-engineering degree idea.
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Old 12-23-2014, 09:24 PM   #11361
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More uptravel and steering mid corner.
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Old 12-23-2014, 09:35 PM   #11362
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Doesn't look taller, it looks more meaty/ stout.
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Old 12-23-2014, 09:40 PM   #11363
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Looks a lil taller. Maybe a few mm?
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Old 12-23-2014, 11:36 PM   #11364
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For anyone that is interested, I just made a shock building video which is posted to my website and YouTube channel. Here is the link: https://www.youtube.com/watch?v=kUq__wtmS7c

BTW....that wiring on the car a few pages back is to dope! I likey.

Talk to yall soon.
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Old 12-24-2014, 07:49 AM   #11365
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Quote:
Testing has been fairly limited so far (not enough high bite tracks near me running meetings at the moment) but hopefully will pick up in the new year.

So far it is very quick, definitely more so than my previous forward motor car, and quicker than the RB6 on high bite stuff.

Bolts on to an otherwise stock RB6 chassis too
Please tell us more! .... Have you developed a 3 gear gearbox? Or a laydown 4 gear gearbox??
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Old 12-25-2014, 06:33 AM   #11366
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Default forward traction

where is it?

cannot be found.

still looking....

what's wrong with this car??

has anyone tried putting the battery to the furthest rear position to where the ESC is supposed to be, and put the ESC between battery and servo??

done so far;
lighter rear oil
lighter spring
unscrewed front eyelets for more droop.
These alone should of made a difference.....but not at all!

so I pulled the wheels off my rb6 and put onto the b4.2......and wow I have sooo much traction.

what's wrong with the rb6?
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Old 12-25-2014, 09:26 AM   #11367
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try the rear mm weight set
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Old 12-25-2014, 10:46 AM   #11368
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Try more anti squat. Shorter rear camber link. What's your shock setup? How many roll center shims? Is your car bound up? It's not just lighter rear shocks and weight. 90% of the people I see don't have the right tires or they aren't loose they just have to much steering in the setup. 2wd cars should push. Get it to push then dial in the steering to suit your needs. Easiest way to set the car up. That's the way I've always done it.....and it's never failed
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Old 12-25-2014, 12:20 PM   #11369
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Quote:
Originally Posted by hacker View Post
where is it?

cannot be found.

still looking....

what's wrong with this car??

has anyone tried putting the battery to the furthest rear position to where the ESC is supposed to be, and put the ESC between battery and servo??

done so far;
lighter rear oil
lighter spring
unscrewed front eyelets for more droop.
These alone should of made a difference.....but not at all!

so I pulled the wheels off my rb6 and put onto the b4.2......and wow I have sooo much traction.

what's wrong with the rb6?
Sometimes setup changes work in the opposite manner of what you intuitively think. If I had to guess based on the changes you've tried, you've got the rear end of the car rolling way too much, possibly picking the inside rear tire off the ground. This will make the car very hard to drive. Give heavier rear springs and shocks than what you originally started with a try, you might be surprised.
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Old 12-25-2014, 06:48 PM   #11370
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On Kevin Kings set-up it says the steering rack is reversed, but he's using a Shelle Racing rack. I too have the Shelle rack, but I can't see how you can reverse it, due to the nut holders?

Any help is greatly appreciated.

Cheers
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