Go Back  R/C Tech Forums > General Forums > Electric Off-Road
Kyosho Ultima RB6 & RB6.6 Car Thread >

Kyosho Ultima RB6 & RB6.6 Car Thread

Community
Wiki Posts
Search
Like Tree172Likes

Kyosho Ultima RB6 & RB6.6 Car Thread

    Hide Wikipost
Old 12-21-2016, 08:46 AM   -   Wikipost
R/C Tech ForumsThread 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

Print Wikipost

Thread Tools
 
Search this Thread
 
Old 08-15-2014, 03:15 AM
  #10711  
Tech Adept
 
Zylux's Avatar
 
Join Date: May 2014
Location: Melbourne, Victoria, Australia
Posts: 133
Default

A couple of weeks ago I mentioned I was going to try and make some 7075 T6 Aluminium hinge-pins for my RB6. Well, I did make some for the front hubs and spindles and ran them all day today. Hit a few things and actually ran into someones foot at full speed (essentially a wall) with absolutely no bending of the hinges.

Looks like I will continue running these into the future. That's about 3 grams of unsprung mass saved! Also made some titanium inner hinges as these will have to handle more stress. Happy days.
Zylux is offline  
Old 08-15-2014, 07:11 AM
  #10712  
Tech Addict
iTrader: (2)
 
Join Date: Jun 2013
Location: Bakersfield
Posts: 635
Trader Rating: 2 (100%+)
Default

Originally Posted by Zylux
Yep. Battery back will give you more rear weight. Also, if you want more rear weight, make sure you remove the rear battery holder, add some stops in front of the motor and slide the battery in under the waterfall brace. If you are trying to increase rear weight bias, you can also move the front and rear hubs all the way forward and remove as much weight as you can from the front of the car (shorty servo, alu axles, Ti Turnbuckles, ball-studs, hinge pins etc).

I managed to get my RB6 MM weight bias to 35.6% front / 64.4% rear whilst still hitting minimum weight.
At what point do you/ would you lose the benefit of MM? When I originally went MM I had the battery all the way back with ESC/ RX infront. At the Surf City I went with Tebos set up + a couple of changes. The set up had the electronics servo/batt/esc. The car felt way better to me than batt all the way back. Granted it was OCRC with ridiculous grip. What is the weight bias of a RM car? Would a person still see a benefit if for example his MM car 35 F 65 R compared to a RM car that was 35 F 65 R. All else being the same, track conditions, tires, motor etc..
CaseyD is offline  
Old 08-15-2014, 07:14 AM
  #10713  
Tech Elite
iTrader: (47)
 
K_King's Avatar
 
Join Date: Jul 2006
Location: San Diego, CA
Posts: 4,234
Trader Rating: 47 (100%+)
Default

Well the main difference is that you will never have the major weight at the very rear most part of the car swinging around. So a MM would never feel like that, it should always corner better and slide out less when getting loose.
K_King is offline  
Old 08-15-2014, 06:17 PM
  #10714  
Tech Adept
 
Zylux's Avatar
 
Join Date: May 2014
Location: Melbourne, Victoria, Australia
Posts: 133
Default

Originally Posted by CaseyD
At what point do you/ would you lose the benefit of MM? When I originally went MM I had the battery all the way back with ESC/ RX infront. At the Surf City I went with Tebos set up + a couple of changes. The set up had the electronics servo/batt/esc. The car felt way better to me than batt all the way back. Granted it was OCRC with ridiculous grip. What is the weight bias of a RM car? Would a person still see a benefit if for example his MM car 35 F 65 R compared to a RM car that was 35 F 65 R. All else being the same, track conditions, tires, motor etc..
I hear what you are saying. But as also stated by K_King, my theory is that if I can get the weight bias closer to a Rear Motor car but with the mass much more centralized it should be more responsive and shouldn't have the overshoot / pendulum effect that a rear motor car would have (lower moment of inertia) but still have the forward traction of a rear motor car.

I run on a medium grip dirt/clay off road track where rear traction is sometimes hard to come by.

My Mid Motor RB6 was about 38.5-39% front when I first built it (with shorty as far back in standard battery holder locations). It is now 35-36% . This has improved the forward traction and I haven't lost too much steering. I have lost a little mid-corner rear traction however (more over-steer).

For comparison, a standard rear motor B5 has a weight split of about 33.7-34.1 front (according to Ray Munday on the "Ask Ray Munday" thread on this forum and the B5M about 36.5-37% (out of the box) and down to 34.2% front after all of Rays modifications.

So I guess if you run on a low-mid grip track I think that more rear weight bias is a good thing as you still have the added bonus of a lower moment of inertia. Car still jumps better, is easier to catch when it loses traction and responds quicker to changes of direction.
Zylux is offline  
Old 08-15-2014, 06:36 PM
  #10715  
Tech Elite
iTrader: (43)
 
aloksatoor's Avatar
 
Join Date: Dec 2010
Location: N California
Posts: 3,152
Trader Rating: 43 (100%+)
Default

I tried tuning with weight in my cougar cars it always ended up being like a rear motor in fact for low bite clay. Since then, tuning with flex and springs/shocks yields better results for me. The LW chassis almost has same grip in MM as the stock in RM actually.

I just personally prefer putting weight as ahead as possible for it to jump flat while still having a lot of give in the rear spring oil combo. Still the rb6 does not handle as well in air as the yok so trying to tune that.
aloksatoor is offline  
Old 08-16-2014, 12:16 PM
  #10716  
Tech Regular
iTrader: (1)
 
Join Date: Mar 2012
Location: NYC
Posts: 254
Trader Rating: 1 (100%+)
Default J concepts honeycomb motor mount

is a total sleeper upgrade. i was using the lightweight milled kyosho upgradea, but at 2mm thick, i felt like it flexed a lot. plus when my motor was hot, the plate was barely warm. i noticed the jconcepts was 3mm, so i got it on my last amain order. does not flex everytime i tighten pinion or motor so winning. but why its totally rad is because that honeycomb design does a kick ass job at dissipating heat. my temps have been 10 degrees cooler and i can feel the motor plate is almost hot (compard to warm), doing a nice job with the heat. the only thing i didnt do was weigh the piece to compare to the kyosho one. but i doesnt matter. 20 bucks well spent!
glenng is offline  
Old 08-20-2014, 03:36 PM
  #10717  
Tech Initiate
iTrader: (3)
 
Join Date: Feb 2013
Posts: 36
Trader Rating: 3 (100%+)
Default

Just for Bling



QIMB528 is offline  
Old 08-20-2014, 05:17 PM
  #10718  
Tech Elite
iTrader: (120)
 
Potoczak's Avatar
 
Join Date: Oct 2009
Location: PA
Posts: 3,702
Trader Rating: 120 (100%+)
Default

Originally Posted by QIMB528
Just for Bling



Who,what,where, and how much???
Potoczak is offline  
Old 08-21-2014, 11:24 PM
  #10719  
Tech Initiate
iTrader: (3)
 
Join Date: Feb 2013
Posts: 36
Trader Rating: 3 (100%+)
Default

Originally Posted by Potoczak
Who,what,where, and how much???
Made it myself, bonded with Hysol 9340.

It wasn't popular a few months back. But if there are enough demand, I will make more.
QIMB528 is offline  
Old 08-22-2014, 08:55 AM
  #10720  
Tech Apprentice
 
Join Date: Jul 2010
Posts: 59
Default

Well I had a question or two but never thought it was a bad idea. It looks great, very nicely done. Are the side gussets keyed as well as bonded?
kineteks is offline  
Old 08-22-2014, 05:43 PM
  #10721  
Tech Initiate
 
helocat's Avatar
 
Join Date: Sep 2010
Posts: 39
Default

Just ordered the kit today. Setting up for stock. I am a totally new to racing and just built a SC6. Local track seems to only run buggies so good excuse to build an RB6.

Should I just build it to the instructions or any sugested set ups to follow. I will be using it mainly indoors on a hi bite clay track.
helocat is offline  
Old 08-22-2014, 08:23 PM
  #10722  
Tech Elite
iTrader: (10)
 
Jochim_18's Avatar
 
Join Date: Mar 2005
Location: CENCAL
Posts: 2,474
Trader Rating: 10 (100%+)
Default

Originally Posted by CaseyD
At what point do you/ would you lose the benefit of MM? When I originally went MM I had the battery all the way back with ESC/ RX infront. At the Surf City I went with Tebos set up + a couple of changes. The set up had the electronics servo/batt/esc. The car felt way better to me than batt all the way back. Granted it was OCRC with ridiculous grip. What is the weight bias of a RM car? Would a person still see a benefit if for example his MM car 35 F 65 R compared to a RM car that was 35 F 65 R. All else being the same, track conditions, tires, motor etc..
since your from Bako ask Zach Rogers his a team driver from Kyosho.
Jochim_18 is offline  
Old 08-22-2014, 08:24 PM
  #10723  
Tech Elite
iTrader: (10)
 
Jochim_18's Avatar
 
Join Date: Mar 2005
Location: CENCAL
Posts: 2,474
Trader Rating: 10 (100%+)
Default

Originally Posted by QIMB528
Just for Bling



Where should I send my payment I want one of this badboy..
Jochim_18 is offline  
Old 08-24-2014, 12:54 AM
  #10724  
Tech Adept
 
Join Date: Jan 2010
Location: In the UK
Posts: 190
Default

Originally Posted by helocat
Just ordered the kit today. Setting up for stock. I am a totally new to racing and just built a SC6. Local track seems to only run buggies so good excuse to build an RB6.

Should I just build it to the instructions or any sugested set ups to follow. I will be using it mainly indoors on a hi bite clay track.
I always build stock then go from there.
No Idea!! is offline  
Old 08-24-2014, 04:55 AM
  #10725  
Tech Elite
iTrader: (14)
 
eper's Avatar
 
Join Date: Jan 2010
Location: new milford, CT.
Posts: 2,622
Trader Rating: 14 (100%+)
Default

Hey guys I haven't been on here in like a year. I lost my job and had to sell my entire line of k cars. Was really sad. But since I scored a new job and yesterday found my scr and rb6 still complete and sitting on the shelf in the very store that bought them. So I bought them back and couldn't be happier. Thing is I got rid ofall my spares and want to go mm does anyone have those parts laying around and not in use. I would like to buy them. Pm me if anyone has them. Thanks.
eper is offline  


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.