[flatthump]

Originally Posted by Stargazer

Torque is a ROTATIONAL force and it doesn't not describe linear movement.

Did you read my post?
In my example, I calculated that force to be Zero becasue there wasn't any mass.(besides the rotor,wheel etc..very small number)


Im telling you, with a locked diff, torque can be anywhere from 0/100 to 100/0 depending on the load.

I've read that link.

[flatthump]

Here is a good thread on Nasioc. There's a good example on the page I provided.

http://forums.nasioc.com/forums/show...ht=DCCD+100%25

[Fly_STi]

I've read this whole thread, flatthump is the most right.

Center Diff Locked = Rotational velocity F&R are equal, torque is proportional to load (traction, in our case)

Open Diff (think Impreza L rear diff) = 50/50 torque split always, rotational velocity is inversely proportional to load

DCCD Locked = More better donuts, trust me

[SENSEIMACK]

This thread it like the show Lost... the more you Read/Watch the more Lost you get...

Can someone simply explain each setting, and what its best used for? Not what it does or how much torque is going backwards to the frontward aft section of the ship. Wait thats Pirates of the Caribbean...

Example: I know Auto is for the Computer Automatically choosing what is best for the car at present driving conditions.

Please explain like im a 5th grader with a STi... <--- Funny...

[lackskill]

Originally Posted by SENSEIMACK

This thread it like the show Lost... the more you Read/Watch the more Lost you get...

Can someone simply explain each setting, and what its best used for? Not what it does or how much torque is going backwards to the frontward aft section of the ship. Wait thats Pirates of the Caribbean...

Example: I know Auto is for the Computer Automatically choosing what is best for the car at present driving conditions.

Please explain like im a 5th grader with a STi... <--- Funny...

DCCD clarification

I don't think I can dumb it down any more than I already have.

[SENSEIMACK]

Actually your right, that was after being on this and the nosiac forums your description is the easiest to understand, but I do have a few clarification items to ask you on... some of them i think i already know but am not sure...

Auto X... meaning if your driving on different terrains?
DD meaning Drive Driving?
50/50 all wheels speen at same speed? What does plowing mean?
I. why no sharp turns?
II. whats the difference between I and II, i guess I is more servere thus better in snow?
III. Whats a cold road? Just a road on a cold day? and what is Ave Driving? Does that mean street driving?
IIII. Gives you the feeling of a Rear Wheel driving car? and Open even more so correct?

[gregsachs]

Originally Posted by SENSEIMACK

Actually your right, that was after being on this and the nosiac forums your description is the easiest to understand, but I do have a few clarification items to ask you on... some of them i think i already know but am not sure...

Auto X... meaning if your driving on different terrains?
DD meaning Drive Driving?
50/50 all wheels speen at same speed? What does plowing mean?
I. why no sharp turns?
II. whats the difference between I and II, i guess I is more servere thus better in snow?
III. Whats a cold road? Just a road on a cold day? and what is Ave Driving? Does that mean street driving?
IIII. Gives you the feeling of a Rear Wheel driving car? and Open even more so correct?

Ok, the dccd wheel is controlling how much slip the system will tolerate between the front and rear wheels, aka how much speed difference it will allow. So in lock, it does not allow any slip. In open, it allows 100% slip in either direction. the settings in between allow progressively more slip between front and rear wheels. This may be roughly linear through the divisions, it may not, would have to use a scope on the solenoid driver to tell.
Note that there are (at least) two important catches to this; as follows:
1: There is a mechanical system involving 3 balls between steel plates. This system is activated by a speed difference, and is part of the mechanism that shifts torque around. What this means is that if it is a non-slip situation, the diff is not limited slip.
2: This same system will serve as a torque limiting safety system, as the balls will push the plates apart and spring to the next set of detents should the torque transfer limit be exceeded. This is the noise you hear when turning in lock and nearly locked settings.
As far as usefulness, I generally leave it in auto. I like lock or nearly locked in snow and other slippery situations, and for screwing around open or nearly open is nice.

[lackskill]

Originally Posted by SENSEIMACK

Actually your right, that was after being on this and the nosiac forums your description is the easiest to understand, but I do have a few clarification items to ask you on... some of them i think i already know but am not sure...

Auto X... AKA autocross. its a motosport
DD meaning Drive Driving? Correct
50/50 all wheels speen at same speed? the same amount of torque is distributed front to rear What does plowing mean? Understeer. Where the front tires dont have enough traction to move you in the direction you are trying to go.
I. why no sharp turns? Because this is a high level of center diff lockup. It may cause binding and harshness.
II. whats the difference between I and II, i guess I is more servere thus better in snow? I wouldnt necessarily say that. I dont think either is particularly any better than the other in snow. I only use auto or lock for snow.
III. Whats a cold road? Just a road on a cold day? yes.and what is Ave Driving? Does that mean street driving? I am not sure, I dont remember the context.
IIII. Gives you the feeling of a Rear Wheel driving car? and Open even more so correct? You are thinking about it wrong. Do you know how a diff works? Can you picture one in your mind? Its just a diff that has a clutch that will allow different amounts of slip/lock. So just think of it as the center diff being allowed to slip more or less depending on the setting. Once you understand that, you will understand how the settings affect the real world.

see above.

[lackskill]

Originally Posted by gregsachs

Ok, the dccd wheel is controlling how much slip the system will tolerate between the front and rear wheels, aka how much speed difference it will allow. So in lock, it does not allow any slip. In open, it allows 100% slip in either direction. the settings in between allow progressively more slip between front and rear wheels. This may be roughly linear through the divisions, it may not, would have to use a scope on the solenoid driver to tell.
Note that there are (at least) two important catches to this; as follows:
1: There is a mechanical system involving 3 balls between steel plates. This system is activated by a speed difference, and is part of the mechanism that shifts torque around. What this means is that if it is a non-slip situation, the diff is not limited slip.
2: This same system will serve as a torque limiting safety system, as the balls will push the plates apart and spring to the next set of detents should the torque transfer limit be exceeded. This is the noise you hear when turning in lock and nearly locked settings.
As far as usefulness, I generally leave it in auto. I like lock or nearly locked in snow and other slippery situations, and for screwing around open or nearly open is nice.

Very well put. If you can picture how the diff works.

[Rootus]

Originally Posted by SENSEIMACK

50/50

No 50/50. No split. Lock = no differential. Also, not all wheels turn at the same speed, just the front & rear shafts. Each end still has a differential and therefore side-to-side wheel speed can differ.

[lackskill]

Originally Posted by Rootus

No 50/50. No split. Lock = no differential. Also, not all wheels turn at the same speed, just the front & rear shafts. Each end still has a differential and therefore side-to-side wheel speed can differ.

[SENSEIMACK]

Thank you guys for you explanations, esp you lackskill. I believe I have it. Thanks for taking the time to explain it.

[EviljokerSTI]

HAHAHA thats funny right there. Little off topic but My friend has and evo and we had this arguement about who's care was better in the snow so when we got a nice snow fall we tested it out, ( yes i know not the smartest thing but it was getting pretty heated) he kept sayin that his snow setting was better because he didnt have to play with a dial) but any way goin around some winding roads we found out which is better! and lets put it this way i was able to pull him out of an 18" snow dift and my car was pulling on 6 " of snow on the street! piss on evo's!

[TattooLost]

I'm glad this thread got made. I've had my car for a little over 2 months, and that button has just confused and enthralled me since that day. I've never messed with it, for fear of touching something I didn't understand. Always kept it in auto.

Now I'm going to have to play witht he open setting down at the local high school parking lot!

I'm assuming the consensus is auto ftw? Even at the dragstrip?

[wdb]

Originally Posted by TattooLost

I'm glad this thread got made. I've had my car for a little over 2 months, and that button has just confused and enthralled me since that day. I've never messed with it, for fear of touching something I didn't understand.

Sounds like the salesperson at the dealership when I bought my car. She pointed at the DCCD control and said, "See that? Don't touch it."

I'm assuming the consensus is auto ftw? Even at the dragstrip?

You might want to do some searching in the Driving & Competition subforums but my guess would be that full lock would be preferable when trying to get as much power to the pavement as possible while going in a straight line.