Torsen vs OEM LSD

[sheizasosay]

If I had a choice of just one thing to do to my car it would be the Torsen. No doubt. Doubles the fun factor.

I might have just shat myself.

 

[LS1EATINPONY]

I know this isnt the right section so please dont scald me. I have seen where most guys who drift and are competitive use a T-2 or T-2R diff. My question is would it make it easier to control the car in a slide? I have talked to a couple of guys with them and a couple without. Ones with a T-2 say go for it. Its gonna be one of the better investments for you. Others without it say upgrade clutch packs and put good fluid in the rearend and go to town. What do you do?

 

[19COBRA93]

I know this isnt the right section so please dont scald me. I have seen where most guys who drift and are competitive use a T-2 or T-2R diff. My question is would it make it easier to control the car in a slide? I have talked to a couple of guys with them and a couple without. Ones with a T-2 say go for it. Its gonna be one of the better investments for you. Others without it say upgrade clutch packs and put good fluid in the rearend and go to town. What do you do?

In a drifting scenario you would kill a clutch diff in no time. For drifting I would think a spool or locker would actually be best as they tend to unhook the tires in hard turns. The gear diffs like Torsen and Truetrac do a great job at sticking the tires under power, not the other way around. Although, when it does spin, it's very predictable and controllable. So maybe they would work well for drifting. Regardless, use a clutch diff for drifting and you'll constantly be rebuilding it, as well as dealing with inconsistent slip on long righthanders.

 

[LS1EATINPONY]

Yea that was my thoughts. One guy on this board has told me that a T-2 works very well for drifting. I believe he has one as well. I know there was a car in Formula D that used one. Not Vaughn Gittin since he runs a quick change rear anyway

 

[2008 V6]

Yea that was my thoughts. One guy on this board has told me that a T-2 works very well for drifting. I believe he has one as well. I know there was a car in Formula D that used one. Not Vaughn Gittin since he runs a quick change rear anyway

A quick change is the way to go. Just change rear gears to suit track and you can concentrate on driving and not have to shift gears so much. T2 is the strongest Torsen for the 8.8. A spool would be stronger for drifting / Kinda like driving on dirt but more front wheel traction.

 

[19COBRA93]

A quick change is the way to go. Just change rear gears to suit track and you can concentrate on driving and not have to shift gears so much. T2 is the strongest Torsen for the 8.8. A spool would be stronger for drifting / Kinda like driving on dirt but more front wheel traction.

Just so that everyone is clear, the "latest" T2 is the strongest of the 3 Torsens. The early T2 is the weakest (but is still available).

 

[2008 V6]

Just so that everyone is clear, the "latest" T2 is the strongest of the 3 Torsens. The early T2 is the weakest (but is still available).

2.7 to 1 bias ratio

 

[sheizasosay]

Just so that everyone is clear, the "latest" T2 is the strongest of the 3 Torsens. The early T2 is the weakest (but is still available).

Does ford even offer the old one?

 

[Boaisy]

Ford doesn't, but most of the other Mustang sites do offer other Torsen versions. Also so does Torsen directly: http://s300909324.e-shop.info/shop/...1dFU8GTqy5rTrNEhFLqpbOBJsDgV66eiJ&shop_param=

 

[zquez]

It looked fine last week when my rear end was opened up (Lana! phrasing!)

 

[csamsh]

that was wonderful

 

[19COBRA93]

Does ford even offer the old one?

Ford doesn't, but most of the other Mustang sites do offer other Torsen versions. Also so does Torsen directly: http://s300909324.e-shop.info/shop/...1dFU8GTqy5rTrNEhFLqpbOBJsDgV66eiJ&shop_param=

Ford Racing offers all 3.

M-4204-T31....Old T2
M-4204-T31H....T2R
M-4204-MB....New T2

2.7 to 1 bias ratio

Yes, both T2's are 2.7:1 bias.

 

[Boaisy]

Ford Racing offers all 3.

M-4204-T31....Old T2
M-4204-T31H....T2R
M-4204-MB....New T2

Ah, when I looked, I just searched by Mustang -> Mustang Parts -> 2011-2013 (they don't return "Driveline" results on 2014 yet) which returns the MB version for each year. Plus "old T2" only mentions "Fits solid axle and 2000-2004 Cobra IRS with 31 spline," and would make people question if that counts the current Mustang since they don't show it on the current Mustang part list. T31H is filed under FR500S.

 

[Sky Render]

Yes, both T2's are 2.7:1 bias.

The older T2 is only 2.0:1.


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[sheizasosay]

Do clutch based diffs even have a bias ratio? One that is measureable?

 

[Sky Render]

Do clutch based diffs even have a bias ratio? One that is measureable?

I believe so, but the types of clutches, the number of them, the order they're "stacked," and the amount of wear on them would all affect it. So it would be difficult to measure.

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[DevGittinJr]

So, the t2 is 2.0, t2r is 4.0, and the Boss t2 is 2.7.

Should the amount of torque available at the wheels be a factor in how much bias ratio one chooses? Meaning, all things (mods) being equal, a 3v will have significantly less torque available at the wheels than a 5.0 while having the same amount of grip. That said, would a higher bias ratio for a 3v (or a lower bias for a 5.0) work out better considering torque vs grip at the wheels? If so, would gear ratio also be something to consider?

 

[Whiskey11]

So, the t2 is 2.0, t2r is 4.0, and the Boss t2 is 2.7.

Should the amount of torque available at the wheels be a factor in how much bias ratio one chooses? Meaning, all things (mods) being equal, a 3v will have significantly less torque available at the wheels than a 5.0 while having the same amount of grip. That said, would a higher bias ratio for a 3v (or a lower bias for a 5.0) work out better considering torque vs grip at the wheels? If so, would gear ratio also be something to consider?

Not really. The limiting factor is how much torque the tires are putting to the ground. The bias ratio then comes into play by how much of that torque the tires are putting down will be transmitted to the outside tire in a turn. Basically the higher the bias ratio (4:1 being higher than 2.7:1 which is higher than 2.0:1) the more of that torque can be transmitted to the outside wheel in a turn. When neither are slipping, the higher bias ratios allow for a greater difference in wheel speed and transmits more torque (which moves the car around a tighter corner better).

The tighter the track/autocross course, the higher bias ratios become more important as they keep the inside tire from lighting up because more available torque is being transmitted to the outside tire instead of through the inside tire which has less "weight" over it due to weight transferring to the outside tire in a turn.

I'm sure a case could be made about the T2R not having a huge difference over the T2 (newer) on a more open road course but I think it's safe to assume that a higher ratio is not at a disadvantage on a more open roadcourse like a lower ratio T2 would certainly be at a disadvantage on a tighter course. Does that make sense?

 

[sheizasosay]

Does that make sense?

You know what makes a lot of sense? For you to buy me a Torsen T2R.

 

[DevGittinJr]

^^Yes, and thanks for explaining that. I was basically trying to understand why the Boss Torsen gets a lower bias than the Torsens that were offered during the 3v.