Ball diffs

[Boothy]

Hello guys, while reading on here I see lots of mention of ball diffs that seem to be fitted to the better models. Whilst looking at DT02 hop ups I see that Tamiya do a ball diff as a hop up part.

So the question is what is the advantage of a ball diff over the standard geared part? and while I am at it why do people seem to want to pack a geared diff with thick grease? What is the advantage there?

I have had a little look on the net but seem to get conflicting ideas so I am getting a little confused.

Is there a resource that explains in simple terms these sorts of things along with car set up and how to actually set up a car?

The other day I saw someone suggest they had set something like one degree of toe in... Now I know what toe in is but how the fudge do you set/measure one degree of it

[94eg!]

The open gear differential is flawed in that it allows all the toque to escape through whichever drive wheel looses traction 1st. To an RC drive this appears that the model lacks power off the line and especially out of a turn where the inside tire is unloaded and prone to slippage. A limited slip diff eliminates this tendancy by keeping some amount of power the other wheel at all times.

The ball diff offers adjustability of the limited slip effect without disassembling the entire gearbox. It also typically reduced drivetrain weight. Back in the early days of ball diffs, they offered limited protection to the drivetrain by way of slippage, prior to the invention of the slipper. Once motor power went up to certain level, it was obvious that a ball diff alone would not protect the drivetrain, and the slipper was then required to protect the ball diff. It's a fun balancing act.

If you are just bashing and happy with your gear-diff, adding a heavy grease like anit-wear will make a WORLD of difference in performance, and cost next to nothing.

[Boothy]

Thanks for the detailed reply, so it's a good idea to really pack a gear diff with thick grease then by the sound of it.

So would it be a worthwhile upgrade for my HB? It will only be used for bashing.

[hammerstien]

if your running a fast brushless rig will help to stop the mad power wheels

[super gripper]

without any doubt the ball diff is far superior in every way and its not even expensive !

If you are putting a faster motor in your car then a ball diff will give you much greater car control and driving satisfaction.

The DT02 chassis is a good chassis for bashing as it is farly robust. From first hand experience, when the chassis is modified a 19 turn spec brushed motor or a 10.5 brushless is the limit for decent car control and performance.

Any more power than that the chassis twists and the cars handling is rediculously pants.

If you are only bashing with a HB 2010 the kit geared diff is ok.

[Boothy]

without any doubt the ball diff is far superior in every way and its not even expensive !

If you are putting a faster motor in your car then a ball diff will give you much greater car control and driving satisfaction.

The DT02 chassis is a good chassis for bashing as it is farly robust. From first hand experience, when the chassis is modified a 19 turn spec brushed motor or a 10.5 brushless is the limit for decent car control and performance.

Any more power than that the chassis twists and the cars handling is rediculously pants.

If you are only bashing with a HB 2010 the kit geared diff is ok.

I'm only looking to put a GT tuned in so nothing to rapid really, it sounds like the ball diff would help to get the best from it though and most likely teach me a little when fitting.

[94eg!]

BALL DIFF ALONE WILL MAKE THE CAR MUCH MORE CAPABLE OF PUTTING POWER DOWN. NO WORRIES ABOUT MELT-DOWN WITH A GT-TUNED SO LONG AS YOU GET THE SETUP RIGHT SO THE DIFF ISN'T SLIPPING UNDER HARD ACCELERATION.

[Boothy]

Is the 3 racing ball diff any good? Seems to be a 3rd of the price of the tamiya one?

[hammerstien]

nope the 3racing ones are a pile of junk can get tamiya one from hong kong for a good price

[94eg!]

3racing anything is usually pretty poor quality and/or fit.

[super gripper]

Is the 3 racing ball diff any good? Seems to be a 3rd of the price of the tamiya one?

I agree with hammerstien.

The 3Racing ball diff is pants >> it is what it is >>>> A ball diff.

The Tamiya ball diff is a limted slip ball diff.

There is no slippper clutch option for the DT02 chassis, It needs the limited slip to stop the daft wheelies