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Old 23-12-2007
jrs jrs is offline
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Question Difference between: Diff, front one-way and centre one-way and when to use them?

Hi,

Just wondering if people have tried the various options of front diff, front one-way and centre one-way on their D4's.

What are the handling differences for the D4?
What's the difference between the front and centre one-ways?
What sort of track surfaces suit each option?

The tracks I'm running on here are quite slippery. I tend to get a bit of understeer going into a corner, specifically the tighter ones, so am wondering if a one-way will help to solve that.

Regards,
Jason,
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Old 29-12-2007
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cmgreen cmgreen is offline
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Quite intresting 92 people have read the post and no replys.

I willl try to give a reason why I use one.

I tend to find that with a front diff in the car will give me off power understeer in a corner, also over a jump make the car nose dive while in the air, plus with a one way you can do a handbrake turn in the middle of a corner where poss. For me the car feels quicker with a oneway in.
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Old 29-12-2007
jrs jrs is offline
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Hi cmgreen,

Are you talking about a front one-way or a centre one-way ? I can see why it would be better in the situation you speak of and that's why I'm looking at fitting one, however I've read elsewhere that you only get the benefit from a one-way if you're running on high traction surfaces - which I'm not. The tracks here as pretty slippery.

I was thinking of loosening the front-diff slightly to see if the extra diff action would give better turn-in. Most forum thread talking about the D4's diffs seem to advice having them as tight as possible, but I reckon that defeats the point of having a diff in the first place - they may as well have a solid axle ;-)
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Old 29-12-2007
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Yeah full one way, I tend to use one every where regardless. Just feel its better for me. Try running them back to back.

At batley regional i started off running a diff up front, i had just got the JC bj4we, so built it as per book, in the last round i switched to a oneway and was at least a second a lap quicker, wish i had started with it in.
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Old 29-12-2007
chris68nufc chris68nufc is offline
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Well CMGreen. I did tell you to do it and you didnt listen to me and still didnt finish higher up than me without a one way!! Sorry Chris had to!
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Old 29-12-2007
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its not just down to turn in

a front one way will give you less control in the air on big jumps when you want to change nose up or down

it also allow more power to be applied out of a corner, as the diff will not diff out (which will happen if you loosen the front diff.) this will give you more forward traction out of a corner
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Old 30-12-2007
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Quote:
Originally Posted by chris68nufc View Post
Well CMGreen. I did tell you to do it and you didnt listen to me and still didnt finish higher up than me without a one way!! Sorry Chris had to!
At least i bought the right one LOL, Sorry Chris had to!
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