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Kyosho Ultima RB6 & RB6.6 Car Thread

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Kyosho Ultima RB6 & RB6.6 Car Thread

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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
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
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 08-07-2017, 05:20 PM
  #14341  
JAE
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Are the AE gullwing's a pop in solution, or do you need extra parts? Any special dremeling or work required? thx

Originally Posted by RogerM View Post
I do on high grip surfaces yes.

Gullwing arms basically change the way the shock inclination changes as the car rolls. The result of this is that, changing nothing else, you lose a little initial steering but gain a good chunk of mid-exit steering.

This makes the car feel more neutral through the whole turn with the tire combinations we run on astroturf / carpet.
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Old 08-14-2017, 04:23 AM
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Originally Posted by JAE View Post
Are the AE gullwing's a pop in solution, or do you need extra parts? Any special dremeling or work required? thx
Drop straight on with a few spacers, think it's 1.5mm outboard and 3mm inboard from memory.
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Old 08-14-2017, 02:33 PM
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Originally Posted by RogerM View Post
Drop straight on with a few spacers, think it's 1.5mm outboard and 3mm inboard from memory.
On the AE, a different tower is run; I'm guessing to maintain sufficient droop. Maybe someone can confirm that in which case double the amount of droop you have after switching.
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Old 08-15-2017, 05:02 AM
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Originally Posted by Woulvesbaine View Post
On the AE, a different tower is run; I'm guessing to maintain sufficient droop. Maybe someone can confirm that in which case double the amount of droop you have after switching.
If you were running short eyelets on the front run mediums, if you were running mediums then run long.

If you were already running long your track isn't going to be suited to gullwing arms anyway so no need to worry.
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Old 08-20-2017, 05:50 PM
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Hey folks,

I bought my RB6.6 used and raced it for the first time yesterday. Did pretty well with it, but the motor ran hotter than I feel comfortable with. I need a fan on it and have been searching for what is available in the aftermarket world....such as the waterfall mount I had on my Assoc. B5M. So far, I've come up empty. Any suggestions?

Thanks!
Tommy
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Old 08-20-2017, 08:13 PM
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Originally Posted by Tommy R View Post
Hey folks,

I bought my RB6.6 used and raced it for the first time yesterday. Did pretty well with it, but the motor ran hotter than I feel comfortable with. I need a fan on it and have been searching for what is available in the aftermarket world....such as the waterfall mount I had on my Assoc. B5M. So far, I've come up empty. Any suggestions?

Thanks!
Tommy
The exotek angled fan mount is what I use, however . . . I used to shoe-goo it to the chassis as well, and while not nearly a cool it works.
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Old 08-21-2017, 04:48 PM
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Originally Posted by Tommy R View Post
Hey folks,

I bought my RB6.6 used and raced it for the first time yesterday. Did pretty well with it, but the motor ran hotter than I feel comfortable with. I need a fan on it and have been searching for what is available in the aftermarket world....such as the waterfall mount I had on my Assoc. B5M. So far, I've come up empty. Any suggestions?

Thanks!
Tommy
nvm...
Stinkin photobucket...
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Old 08-21-2017, 10:11 PM
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Well, I ordered a 30mm fan from Maclan and will try to install it similar to what I saw in an RC Car Action article. Haven't decided on the mounting method yet, however...and I can't quite tell how this one (below) was attached.

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Old 08-22-2017, 05:55 AM
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I can't figure out this image linking anymore...
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Old 08-22-2017, 10:01 AM
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Originally Posted by Tommy R View Post
Well, I ordered a 30mm fan from Maclan and will try to install it similar to what I saw in an RC Car Action article. Haven't decided on the mounting method yet, however...and I can't quite tell how this one (below) was attached.

Looks like double-sided tape to be honest . . .
the fan does not have a screw in it for a mount, and it does work . . .
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Old 08-22-2017, 10:03 AM
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Best way is to CA glue the fan to the double sided tape and stick the tape to the chassis. This is better than the fan mount as it doesn't bounce around. Distributor for WTF fans gave me the advice and haven't broken one since
Originally Posted by mupchu View Post
Looks like double-sided tape to be honest . . .
the fan does not have a screw in it for a mount, and it does work . . .
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Old 08-23-2017, 11:45 AM
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Originally Posted by JAE View Post
Best way is to CA glue the fan to the double sided tape and stick the tape to the chassis. This is better than the fan mount as it doesn't bounce around. Distributor for WTF fans gave me the advice and haven't broken one since
Now that's pretty interesting! I may give it a try when the fan arrives tomorrow. Thanks!
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Old 08-23-2017, 11:57 AM
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I shoe goo mine down. No issues at all and with a little heat it releases clean.
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Old 08-23-2017, 12:02 PM
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Best thing about doing it this way, other than it stays secure, is that being it is CA glued to the tape you can still take your motor out. The fan can be bent since it is the tape that flexes a little and fan is CA'd to the tape.
I've taken my motor out a dozen time and never had to re-tape the fan.


Originally Posted by Tommy R View Post
Now that's pretty interesting! I may give it a try when the fan arrives tomorrow. Thanks!
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Old 08-23-2017, 12:18 PM
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I have a setup question(s) for everyone. I picked up my RB6.6 used. I went through it and set it up with the box stock setup as best I could, but the manual was a bit unclear in some regards. I also noticed that the rear pistons were 4 hole, but I believe they were originally 2 hole?

I'm running on a very smooth turf track that's awfully high bite so I'm running a laydown transmission setup with a shorty pack as far forward as I can get it. I'm also running the hardest front springs and the second hardest rears, based on some info I found online. Given the high grip levels, I thought it seemed pretty reasonable. Anyway, I threw 35 WT in the dampers and raced it last weekend. It did well, but had a few issues...

It had a slight push on corner entry. Not awful, but it was noticeable. It also flat-landed poorly and would seem to slap and get sideways sometimes. The track's landings are easy to overshoot and when I did, the car would typically get pretty upset costing me lots of time. Here's a video a friend took for me while I was practicing:
https://www.youtube.com/watch?v=Uqc9ODkej98

I also checked the petitrc site, but didn't see a setup for high grip, smooth turf that's geared for an RB6.6 (as opposed to an RB6). Any suggestions?
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