Kyosho Ultima RB6 & RB6.6 Car Thread
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#5806
Tech Adept
iTrader: (1)
RB5 vs RB6 rear arms
I was doing some comparisons and thought I would share
The rb5 arms place the hubs farther back ~2mm than the rb6 arms (the arms are centered on the pins though you cant tell from the camera angle).
The other differences on the rb6 arms
- lower shock mounting location
- inside pivot is 2mm narrower
- outside pivot is 2mm wider
- shock mounting is about 2mm farther forward if shimmed center
The rb5 arms place the hubs farther back ~2mm than the rb6 arms (the arms are centered on the pins though you cant tell from the camera angle).
The other differences on the rb6 arms
- lower shock mounting location
- inside pivot is 2mm narrower
- outside pivot is 2mm wider
- shock mounting is about 2mm farther forward if shimmed center
#5808
Tech Regular
#5809
Lots of people like the J concepts body's but I think that double window and chevron stair step on the back of the hood is fuggly.
just my taste.
#5810
Tech Elite
iTrader: (14)
droop
why wouldnt you just measure full shock length like we do on 8th scale? seems a heck of a lot more simple.. i like the keep it simple stupid approach.. and you could always have blocks machined that you would put under the chassis with no wheels on the car and take your ride height and measure to the lowest point on the arm. then adjust eye lit till both sides are equal.
#5811
Tech Elite
iTrader: (68)
Hi guys im hoping you can help me with a problem that I have. Fyi this is my first 10th scale vehicle. Here is the problem. build ball diff set pretty tight and installed avid clutch system did the brakein like the youtube video. Here is the issue when I have the car on the stand and slowly rotate the wheel the other wheel does not rotate in the opposite direction. Im assuming that means that I have it to tight. When I drive the car on my carpet it drives fine. When I try to do the lift test to set the clutch, the car will not lift. I also have thightened the clutch pretty much all the way. Is the issue the diff?
#5812
Tech Champion
iTrader: (73)
Hi guys im hoping you can help me with a problem that I have. Fyi this is my first 10th scale vehicle. Here is the problem. build ball diff set pretty tight and installed avid clutch system did the brakein like the youtube video. Here is the issue when I have the car on the stand and slowly rotate the wheel the other wheel does not rotate in the opposite direction. Im assuming that means that I have it to tight. When I drive the car on my carpet it drives fine. When I try to do the lift test to set the clutch, the car will not lift. I also have thightened the clutch pretty much all the way. Is the issue the diff?
#5813
Tech Elite
iTrader: (16)
Pistons and oil
Here's a question for you. What pistons, oil and springs as a BASE starting point for indoor tracks with medium bite? I understand that the set-ups may be different, but just looking for a starting point.
Stock out-of-the box pistons (5 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Losi 55 pistons (4 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Ghea pistons
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Avid pistons What size and # of holes
Size ___________ Holes _______
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Stock out-of-the box pistons (5 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Losi 55 pistons (4 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Ghea pistons
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Avid pistons What size and # of holes
Size ___________ Holes _______
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
#5815
Tech Elite
iTrader: (89)
Join Date: Aug 2009
Location: " The World's Most Famous Beach "
Posts: 2,307
Trader Rating: 89 (100%+)
#5816
Tech Elite
iTrader: (89)
Join Date: Aug 2009
Location: " The World's Most Famous Beach "
Posts: 2,307
Trader Rating: 89 (100%+)
Here's a question for you. What pistons, oil and springs as a BASE starting point for indoor tracks with medium bite? I understand that the set-ups may be different, but just looking for a starting point.
Stock out-of-the box pistons (5 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Losi 55 pistons (4 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Ghea pistons
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Avid pistons What size and # of holes
Size ___________ Holes _______
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Stock out-of-the box pistons (5 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Losi 55 pistons (4 hole)
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Ghea pistons
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Avid pistons What size and # of holes
Size ___________ Holes _______
Front oil _______ Rear oil _______
Front spring _________ Rear spring _______
Losi 55 pistons (4 hole)
Front oil __35_____ Rear oil _30______
Front spring __pink_______ Rear spring __gold_____
Some say that oil should be a lighter weight 32.5f / 27.5 rear but I am pretty happy with the heavier weight oils
#5818
I fought this same thing with more than normal "slop" in the steering (compared to our previous RB5's). I tried shimming and found the only way to rid the cars steering slop, was to replace the stock (plastic) steering crank arms & the king pins every once in a while. I also run the UMW701 Alum rack and found that changing the cranks & king pins is what keeps things tight as they both wear a bit (more than can be seen by the eye). Its not the most economical means to "fix" the slop, but it does keep things tight.
#5819
Tech Adept
iTrader: (1)
Has anyone tried two hole 1.6mm pistons on the RB6?
#5820
Should I be measuring the rear ride height under the transmission, or in front of the trans?
Also should I drop the car then measure? It seems like if I drop it, then roll it back and forth a little it will raise a couple millimeters.
Also should I drop the car then measure? It seems like if I drop it, then roll it back and forth a little it will raise a couple millimeters.