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Re: uprated viscous cupplings

PostPosted: Mon Apr 15, 2013 3:35 pm
by cgtdream
What the...how'd the heck did i miss out on this...If there is another unit available im down to buy!

Re: uprated viscous cupplings

PostPosted: Mon Apr 15, 2013 4:02 pm
by st185-sainz
bmt wrote:Just curious what are the torque settings on a unit if I still want to use the handbrake Mario?

I presume the 400nm is used for those that DONT want to do handbrake turns?

If you are one of the people that bought an uprated unit please let the rest of us know how good the unit works and the set up in your car, (Motor,box, power etc)

Cant tell from the picture, did they put a drain/fill screw in it? Or is that just a waste of time since everything has to be disassembled to clean all those plates?

Cheers!


hi,

according to my manufacturer you can use the handbrake up to 380Nm without any problem. We are running 350Nm in our car and it still works fine!

I'm not sure if just a drain screw would be enough to get out the whole fluid. As I have seen people rebuilding the VW units they are unscrewing a whole flange.

If this rebuild and reset was done you should be able to do at between one or two WRC seasons with that part until it should be rebuilded again. I guess we are all no factory drivers and will not recognize if torque goes down a few percent after a few thousand kilometers in heavy rally use...

My setup is ST185CS with gen2 engine 300hp and 550Nm, close ratio straight cut dogbox, Cusco LSD rear diff.

mario

Re: uprated viscous cupplings

PostPosted: Mon Aug 12, 2013 12:32 am
by Sluice Box Hero
any idea on what cst rating they are using for the 350+Nm units? ive found anything from 100000 to 20000000 cst fluids.

Re: uprated viscous cupplings

PostPosted: Wed Nov 20, 2013 3:12 am
by BADNEWS
Showing people what this VC is like. Mine was rated at 400NM. Anyone have a rear clutch type LSD that could make a video doing the same thing but with a stock VC unit to compare? Or someone that has a 300NM unit from Mario just to see the difference.

http://youtu.be/OiVXBazmlWo

Re: uprated viscous cupplings

PostPosted: Wed Nov 20, 2013 11:54 pm
by BADNEWS
Here is a video where I test the freeplay in the differentials and etc. Then since I can use 2 hands and have the camera (aka my cell phone lol) on the ground, I try and get the Viscous Coupling to let the rear tires move with the front tires locked into position on the ground.

http://youtu.be/Xx1f6HNlGQQ

Here is a view from the other side as I try to get the Viscous Coupling to let the rear tires move with the front tires locked into position on the ground. I was testing this for myself to make sure the rear tires were in fact moving in the SAME direction which means the VC was moving rather than the clutch discs in the rear lsd giving way and the tires would of been moving in opposite direction.

http://youtu.be/HNkWvblxk6I

Re: uprated viscous cupplings

PostPosted: Thu Nov 21, 2013 5:04 pm
by phattyduck
I assume those tests are all done with the trans in neutral? If so, you are a pretty tight setup.

It would be pretty much impossible to do the same tests with an open or torsen rear diff. I suppose you could work something with just the front end of the car off the ground and some drag on the front wheel? Not sure...

-Charlie

Re: uprated viscous cupplings

PostPosted: Thu Nov 21, 2013 5:35 pm
by BADNEWS
phattyduck wrote:I assume those tests are all done with the trans in neutral? If so, you are a pretty tight setup.


Yes the car was in neutral with the E-Brake off.

phattyduck wrote:It would be pretty much impossible to do the same tests with an open or torsen rear diff. I suppose you could work something with just the front end of the car off the ground and some drag on the front wheel?


Yes you need a rear clutch type lsd to do a test like I just did. If you put the rear end down and try to spin the front wheels it will just spin the other front wheel in the opposite direction due to the front diff being open. I really want someone that has a clutch type TRD or Cusco rear lsd with a stock VC unit to video themselves as they try to reenact the same test I just did.

My setup is extremely tight though. To give an example. When I back down my driveway and turn the wheels hard in one direction in order to pull into the street. Usually in a factory car you would let off the throttle and coast back a couple feet when you put the clutch in, in order to put it in first gear while you coast. Well the instant I put the clutch in, I stop instantly and don't coast any distance at all. I can feel all the binding in the driveline. This is also true with tight U turns when going forward. But in normal everyday driving I don't notice anything.

With the steering wheel straight you have about 1.33 turns in each direction till it locks out. I get about 3/4 to 1 full turn on the steering wheel before I start to feel it binding. But that last .33 or so of the turn on the steering wheel you HAVE to use the throttle to even move the car. I can hear my tires on the pavement sliding and etc rather than just rolling smoothly. A friend was behind me one time as I took a sharp turn from a parking lot onto a street. He told me that he saw my rear end slide out to the side in order to make the turn rather than the tire roll like a normal car.

My car is pretty extreme and for the little I drive it, I like the setup. But if this was a car that gets driven more than 3,000 miles a year, I would be wanting to take my VC out for a stock to less powerful one and changing my Cusco discs around to free everything up. (The Cusco is adjustable with how you stack the discs in it and I have it set to the harshest engagement)

Re: uprated viscous cupplings

PostPosted: Thu Nov 21, 2013 6:12 pm
by CMS-GT4
Ripley and Joe have a clutch rear, but they are camera shy.

Re: uprated viscous cupplings

PostPosted: Thu Nov 21, 2013 7:45 pm
by darthripley
I'm going to film it for him Josh & you still won't see us anywhere...just a hand or 2 here or there ;)

Re: uprated viscous cupplings

PostPosted: Thu Nov 21, 2013 7:54 pm
by CMS-GT4
Would you wear a Darth Vadar costume while doing it? I think that would be better.

Re: uprated viscous cupplings

PostPosted: Wed Dec 18, 2013 7:47 am
by st185-sainz
st185-sainz wrote:
The following list is still active:
#1: underscore
#2: ALLensTRAC
#3: MWP
#4: mikahogl (friend)
#5: thespen
#6: cgtdream
#7: donk2k



Is anybody of the above mentioned people still interested in buying an uprated unit?!

I decided to clear my storage and make some special christmas offer. The first one who pays gets the unit for 555EUR shipped. Offer is active until 31.12.2013 23:59

Is there any interest on uprating some more units in 2014?!

Please have also a look in the marketplace section where I have a special offer for my diffmount kits.

Mario

Re: uprated viscous cupplings

PostPosted: Wed Sep 02, 2015 5:15 pm
by celica_st185
Hi

Is it still possible to buy one of these?

I live in Norway, and really need one for my rallycar

Re: uprated viscous cupplings

PostPosted: Thu Oct 29, 2015 3:07 pm
by TRDTurko
celica_st185 wrote:Hi

Is it still possible to buy one of these?

I live in Norway, and really need one for my rallycar


Ditto for my Autocross build

Re: uprated viscous cupplings

PostPosted: Wed Nov 18, 2015 3:17 pm
by Bempa
Is there still interest in this? I could hopefully arrange something if there is still interest

But not from same guy

It's another source

Re: uprated viscous cupplings

PostPosted: Tue Mar 01, 2016 12:56 pm
by Toyotalevin
I would to get the upgrade. Would I have to send mine