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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 02-22-2015, 10:17 AM   #11731
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I tried my car with 25+4 and REALLY liked it. It calmed the front end down just enough but it still had a great amount of steering. Our new layout is really flowing and tight and so far I've been able to put down the fastest laps.


https://dl.dropboxusercontent.com/u/...Feb%202015.pdf

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Old 02-22-2015, 03:35 PM   #11732
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What does the 2mm on the ackerman do?

Think I'm going to try the 25+4.. Say I already have to way to much so taking some out might help.
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Old 02-22-2015, 03:42 PM   #11733
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Makes the steering more aggressive. Since I'm running 25+4 caster it loses some low speed but this brought some back while keeping it tame. I like it quite a bit.
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Old 02-22-2015, 03:45 PM   #11734
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Sweet! Think I'm going to try this out.

Thanks.
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Old 02-22-2015, 07:40 PM   #11735
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Sorry for double post but does the car come with the stuff to do the +4 change? Or do you have to order it? Went through my stuff and didn't see any inserts for the casterblock.
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Old 02-22-2015, 07:43 PM   #11736
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Quote:
Originally Posted by 3srcracing View Post
Sorry for double post but does the car come with the stuff to do the +4 change? Or do you have to order it? Went through my stuff and didn't see any inserts for the casterblock.
Yes it comes with 0,2,4 inserts.
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Old 02-22-2015, 09:59 PM   #11737
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Quote:
Originally Posted by 3srcracing View Post
Sorry for double post but does the car come with the stuff to do the +4 change? Or do you have to order it? Went through my stuff and didn't see any inserts for the casterblock.
It should have unless the person who sold it to you tossed them. If you buy the caster blocks it comes with a full set of A and B inserts in 0, 2 and 4.
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Old 02-22-2015, 10:00 PM   #11738
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So just rebuilt my shocks. Put pink in the front. Gold In the rear. 32.5 all the way round and medium ends all the way around. And 2x1.6 pistons all the way around. Still no difference. My collars are all the way to bottom of the threads all the way around. I just don't get it. Bout to just say fuck it an run it lol the rear barely even bounces back. 24mm ride heights
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Old 02-22-2015, 10:23 PM   #11739
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Can you post pics please
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Old 02-23-2015, 10:30 AM   #11740
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Quote:
Originally Posted by K_King View Post
Makes the steering more aggressive. Since I'm running 25+4 caster it loses some low speed but this brought some back while keeping it tame. I like it quite a bit.
Great post/testing here. I always wondered why KYO was the only 1/10 buggy to run 25deg of total front caster. Sounds like you have calmed it down a bit going to 29deg of total caster.

I think for our tight indoor tracks in my area, 25deg would be a better option. For more flowing/larger tracks I think 29 makes sense.

I like your idea of adding spacers to the ackermann bar, tighter turning radius, to get more turn-in as well.
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Old 02-23-2015, 11:12 AM   #11741
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Just got an RB6 and it is my first 2WD buggy.

Can anyone point me to a decent carpet setup? Track is a medium size indoor. 2 layers of carpet over concrete. Tires are spec - Proline Pin Points rear and Proline Wedges on the front. Grip is super high bite.

I have all the OEM kit-included options as well as the UMW722 brass front suspension holder as well as the UMW719 rear bulkhead weights available to me.

Currently it is set up in mid configuration (shortie battery) with receiver on top of servo and ESC in between motor and battery. It is set up with 1.5 of negative camber on all 4 corners, 3 of rear toe in and about 1.5 of toe out in the front. 45wt shock oil in the front and 35wt in the rear.

Any thoughts/suggestions appreciated.
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Old 02-23-2015, 11:53 AM   #11742
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I've never ran on carpet but petitrc has alot of setups just go to the carpet section.

http://www.petitrc.com/setup/kyosho/...UltimaRB6.html
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Old 02-23-2015, 04:13 PM   #11743
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Quote:
Originally Posted by K_King View Post
I tried my car with 25+4 and REALLY liked it. It calmed the front end down just enough but it still had a great amount of steering. Our new layout is really flowing and tight and so far I've been able to put down the fastest laps.


https://dl.dropboxusercontent.com/u/...Feb%202015.pdf


I started with a setup very similar to k-kings but inline battery on Sunday, then looking for more drive off the corner I used the 1.1mm rear sway bar with a pink rear spring(moving down from gold) and the shock out one hole on the tower and no brass weight on the back. Got more entry/mid steering and more drive off. As the tracked gripped up I thought the spring would be to soft but it never felt this way. Track ended up high grip outdoor, was running bald proline suburb x2 compound tires and was still hooked up in mod.

Would like to try this setup in a low grip condition now. I was all set to do the side ways shorty mod but the car is so good at the moment I'm not sure I will bother.
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Old 02-24-2015, 08:33 AM   #11744
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Any ideas of the AE front spring that is similar to the Kyosho gold front??
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Old 02-24-2015, 09:00 PM   #11745
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Quote:
Originally Posted by Headling View Post
Any ideas of the AE front spring that is similar to the Kyosho gold front??
http://www.petitrc.com/reglages/Univ...pringChart.htm
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