C/diff Advice!

[burgy_51_]

Ive had my 07sti for just under a year now and ive always had the diff on auto, i was reading

the manual and it didint make sense, so my question is if i put it into manual and had it set forward, so on the dashboard it is at the top of the six settings youve got, and i put the boot down what will happen? and viceverca if it was set backwards to the bottom of the setting what will happen if the boot was down? Im i making sence to yous, any help would be great cheers!

[cullenmin]

Theres more than 6 settings, every little notch on the c-diff thumb wheel alters the torque split, even though there is only 6 lights on the dash.

I understand it as being the torque that is being split between front and rear. If you lock the torque split then all 4 wheels practically turn at the same time, handy for loose gravel and snow to gain traction from the wheels that have the grip. Swinging the diff wheel to the back will allow the torque to be distributed to the rear wheels (allowing the rear wheels to spin while the front do not).

This is always a technical topic, I have read many different theorys on how it works, but this is how I see it in my mind. Hope it makes a bit of sense

Rich

[Maxxed_Ross]

I've been playing around with this myself lately and I now tend to drive with the diff in manual all the time, normally with the lights sitting about in the middle of the range as I found that to be the best all round position for me anyway

I found with the extra power of the RB the auto setting couldn't quite keep up some times, and you could feel the power shifting about in hard corners and roundabouts - not a nice feeling at all!

When the bias is towards the front I found that the car tends to understeer alot more on roundabouts, and you notice torque steer a bit more

Towards the rear and the trail ends starts getting twitchy, but that means in the damp you can kick the back out and hold it fairly easily (almost makes you look like you know what you are doing!)

best bet is to ignore the manual and go play with it... that's the best way to learn

[sparky_sj04]

I've been playing around with this myself lately and I now tend to drive with the diff in manual all the time, normally with the lights sitting about in the middle of the range as I found that to be the best all round position for me anyway

I found with the extra power of the RB the auto setting couldn't quite keep up some times, and you could feel the power shifting about in hard corners and roundabouts - not a nice feeling at all!

When the bias is towards the front I found that the car tends to understeer alot more on roundabouts, and you notice torque steer a bit more

Towards the rear and the trail ends starts getting twitchy, but that means in the damp you can kick the back out and hold it fairly easily (almost makes you look like you know what you are doing!)

best bet is to ignore the manual and go play with it... that's the best way to learn

That's strange... I have a lot more power than an RB and auto-mode is not an issue.. It certainly has no problems "keeping up". I have been told by some very experienced and skilled Scooby drivers that to keep it on the road auto-mode is the way to go.. Because the electronics will always react faster than you can!

If the bias is towards the front (nearly locked) then the power will be more evenly distributed between front and rear (all 4 turning together) so it will be a pig to drive in twisty stuff, or as you say, roundabouts. Very good in snow though if you just need to get to your destination.

Although the diff says 'locked' in it's furthest forward position, it is never completely locked... it's just another gradient.

Personally I keep it on auto for most of the time.

But horses for courses and all that!! If you find it better adjusting it in manual then that's good.

[Maxxed_Ross]

I thought the power wandering issue was just me being silly, but the first time I took my grandad out in it (he used to rally and auto-test mini's back in the day) commented on how it felt a bit strange in the corners

It might just be because it's the first Impreza I've had so I'm not used to how the AWD works

Although I do admit I leave it in auto for motorway and short trips, but always in manual when I got out for a play, which is the only thing the RB does 80% of the time anyway lol

oh and I forgot to say in the first post - if the diff is in auto you get all sorts of weird noises off it when you reverse, but in manual it's fine

Edited May 1, 2009 by Maxxed_Ross

[paul555sti]

http://bbs.scoobynet.com/scoobynet-general...nding-dccd.html

Have a look at the posts by Johnfelsted

[burgy_51_]

Cheers guys! Next big carpark im in im going to mess about with it.

Dont fancy on the roads incase i do something stupid on the corners,

Way my old skyline with the rear drive, coiming out a corner the backend swongout

more.

[cullenmin]

oh and I forgot to say in the first post - if the diff is in manual you get all sorts of weird noises off it when you reverse, but in manual it's fine

You will get this when reversing on tarmac when in manual and thumb wheel forward. This is because when you turn and reverse, all the wheels are turning at different speeds, if the diff is further forward or locked then it will start to drag a wheel, diff deosnt like this and thats why you get some funny knocks.

[badbaz]

Since I have a MY05, I like Johnfelsted!!

Edited May 1, 2009 by badbaz