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View Full Version : TDS on CAT SX

Oliv996
25-11-2008, 09:31 PM
Do you think it could be a good tuning option?

I sought in my old CAT2000 spare parts a it seems some TDS parts could take place onto CAT SX with minor mods ;)
mw02veg
25-11-2008, 09:42 PM
myself n my dad haave suggested this to the big man(phil) wen we first got our cat at the euros he said he would look into this matter :thumbsup: on our previous ride we found it extremly useful. but running the car with a diff and removing the pin on the layshaft makes it fell very similar just with out the adjustment
MattW
25-11-2008, 09:45 PM
I think it would be a cool idea - which is why i too asked for it to be looked at as an option. Hopefully at some point something will happen.

Personally i'm not so bothered about the TDS slipper (for the rear on cat 2000) but the ABS on the front would be very useful IMHO.
Oliv996
25-11-2008, 09:57 PM
Oh yes Matt, I write TDS but I was thinking about ABS: the tuning center oneway on the front ;)

Tomorrow I will try to mod some parts :D
ulrich
25-11-2008, 10:05 PM
Oh yes Matt, I write TDS but I was thinking about ABS: the tuning center oneway on the front ;)

Tomorrow I will try to mod some parts :D

Please post photos when it is ready.. adjustable one-way could be nice..

Ulrich
CharlieF
25-11-2008, 10:28 PM
Hi Ulrich.
Nice to see you are still interested in developments for the Schumacher car. Great pics of the scene in your country! It was good to see the photos of you and your wife and kids.
Regards
Charlie.
mole2k
25-11-2008, 10:44 PM
I loved the ABS in my cat3k!
MattW
26-11-2008, 12:31 PM
Oliv, Let me know how that goes - as i'd be very interested. I did look at the bits to work out if one could be fitted - as i had an old ABS unit laying around in an old box!!
Oliv996
26-11-2008, 02:03 PM
Matt, here it is :thumbsup:

It requires some hand made parts and some mods on the oneway pulley, nevertheless the ABS plate can be use without any mod and location of the pin in the shaft is perfect ;)

http://img92.imageshack.us/img92/5963/dscn8703bjk3.jpg
Rich D
26-11-2008, 02:37 PM
Very clever :thumbsup:
Oliv996
28-11-2008, 01:04 PM
After ajustements on few parts, the sub-assembly looks like this:

http://img296.imageshack.us/img296/9128/dscn8720is3.jpg

http://img118.imageshack.us/img118/9022/dscn8721oe3.jpg

Exploded views:
http://img366.imageshack.us/img366/7052/dscn8704gl2.jpg

http://img141.imageshack.us/img141/8664/dscn8706cr5.jpg

http://img354.imageshack.us/img354/9999/dscn8707io8.jpg

Parts I have made:

First PTFE shim
http://img141.imageshack.us/img141/1126/dscn8709ss0.jpg

Second PTFE shim
http://img141.imageshack.us/img141/5112/dscn8711sl1.jpg

Second ABS plate
http://img354.imageshack.us/img354/1898/dscn8712vv4.jpg

The pushing ring:

http://img293.imageshack.us/img293/8954/dscn8718vx4.jpg

Modified parts:

The CAT SX front shaft where I put a headless screw and where I drilled a 1.5mm hole for the second pin
http://img391.imageshack.us/img391/2572/dscn8713vv6.jpg

First ABS plate (coming from CAT2000 or CAT3000 ABS option)
http://img385.imageshack.us/img385/6152/dscn8714tr0.jpg

The CAT SX oneway pulley, flattened on both side:
http://img140.imageshack.us/img140/6677/dscn8715oe9.jpg

http://img293.imageshack.us/img293/2720/dscn8716bb8.jpg

Part taken as is:

The ABS spring (coming from CAT2000 or CAT3000 ABS option):

http://img293.imageshack.us/img293/1664/dscn8717qx3.jpg
Chrislong
28-11-2008, 01:45 PM
I like the look of this a lot! Excellent work!!! :thumbsup: :thumbsup:

Am I right in thinking, it'll only function with a diff in the front. The one way diff will roll forward and cancel the benefits of this TDS?

Which leads me to next idea, how about a friction assembly within the one way diff? There's a challenge, as im guessing there is not enough room. :confused:
MattW
28-11-2008, 01:54 PM
Chris, Yes it's an adjustable centre one way unit. So you have a diff in the front, and can adjust how much "one way action" you get from the centre. Allows you to have it tight enough to be able to get on the breaks, while not completely locking the front end up while it corners.

Oliv, work looks great :thumbsup: well done with that. I had been trying to work out yesterday how you would sort a layshaft!!! now i see.
DCM
28-11-2008, 01:56 PM
PATENT IT :woot:
Oliv996
28-11-2008, 01:59 PM
I like the look of this a lot! Excellent work!!! :thumbsup: :thumbsup:

Thanks Chris ;)


Am I right in thinking, it'll only function with a diff in the front. The one way diff will roll forward and cancel the benefits of this TDS?


Absolutely right !


Which leads me to next idea, how about a friction assembly within the one way diff? There's a challenge, as im guessing there is not enough room. :confused:

It was my first dream for the X-5: a tunable oneway :wub
And I think it could be possible to introduce friction material between outdrives and pulley. The main issue is having enough place to put a spring or belleville washers inside outdrives :confused:
Oliv996
28-11-2008, 02:09 PM
PATENT IT :woot:

:lol:

I can't, because it has been already released by Schumacher as option for CAT2000...
super__dan
30-11-2008, 12:47 PM
LEGEND!
Oliv996
30-11-2008, 02:05 PM
LEGEND!

100% ?

Thanks my old mate ;)
Oliv996
30-11-2008, 02:46 PM
Here is the ABS system installed on the CAT SX:

http://img352.imageshack.us/img352/5071/img1782lk4.jpg

http://img293.imageshack.us/img293/4285/img1778vg7.jpg

http://img139.imageshack.us/img139/8691/img1779qa1.jpg

http://img142.imageshack.us/img142/2884/img1780vk7.jpg
super__dan
30-11-2008, 03:18 PM
Batter than factory??? ;)

Does it work exactly like the xx4 clicker i.e. locked on acceleration but variable 'slip' on brakes?

Olivier are you coming to the Petit race?
MattW
30-11-2008, 03:37 PM
Dan, it's much better than xx4 - as it is a proper one way bearing rather than ratchet like xx4 is, but yeah you have the idea.

Looks good Oliv - but then you knew that!:woot:
Gayo
30-11-2008, 03:45 PM
:o:o:o

We should clone Olivier so every brand could have one on its team... Oh wait, just give him every car available and he will make wonders :thumbsup:
SHY
30-11-2008, 08:43 PM
Olivier: Send a CV + details of some of your work to all the car manufacturers. You should be working full time with RC development! :thumbsup:

Does it hurt to have such a big brain? :lol:

Now I want a CAT just because of you! :lol::lol::lol:
Oliv996
01-12-2008, 08:22 AM
Olivier are you coming to the Petit race?

Dan, I don't think so, 'cause due to my job I plan to move at the beginning of 2009 with my wife and children. There will be lot of things to manage else than RC stuff :yawn:

:o:o:o

We should clone Olivier so every brand could have one on its team... Oh wait, just give him every car available and he will make wonders :thumbsup:

Clone have been already done Raph... Did you see my young daughter? She like me but with long hair :lol:

Olivier: Send a CV + details of some of your work to all the car manufacturers. You should be working full time with RC development! :thumbsup:


Yeah Shy, what a great idea !!!


Now I want a CAT just because of you! :lol::lol::lol:

Beware of the CAT, it doesn't like cold countries, it will rather prefer to stay at home than run outdoor :lol:
elvo
01-12-2008, 10:52 AM
It was my first dream for the X-5: a tunable oneway :wub
The main issue is having enough place to put a spring or belleville washers inside outdrives :confused:



Other than a lack of space, there's also the problem that you need exactly the same amount of friction for both sides. And weight. It'd be one heavy mofo of a diff.
Oliv996
03-12-2008, 07:56 PM
Hi Bruno !!!

During my X-5 period, I was thinking about a thrust bearing in each oneway outdrive, plus some Belleville washers in one of the outdrive, and a long screw through all these parts. As for friction function, what about two thin PTFE washer between each outdrive an oneway body ?

This way we can expect to have same friction effect on left and right side :confused:

I agree the thickness of thrust bearing + Belleville washers + head screw could be enormous regarding the available space :yawn: