I had someone at a race shop tell me I should get it welded

I'm sure it's the same effect, but I asked GTPro about it, and they said it wasn't a good idea, but I don't remember why. I hope someone replies that knows something. I know it makes it a bitch to make any sharp turns though, so it is usually only good for drag racing.

 

I know it makes it a bitch to make any sharp turns though

??? I may be wrong but I don't think it would have any affect on steering

 

It wouldn't seem like it.....

But the guy who told me about getting it welded had his center diff welded on an AWD eclipse, and he's the one that mentioned it made it harder to turn afterwards.

 

ask Jeff L he would know

 

it makes it harder to turn just like a spool does on a musclecar Mitch! Or ever drive an old 4WD truck! The VC eliminator or welding the center and rear diffs ties the left and right CV shaft output TOGETHER - SOLID - NO slipping. The factory viscous unit transfers power and allows slippage. Hence better traction BUT:

When you turn, the outer wheels are on the outside radius of the curve compared to the inner radius the inner set of wheels are on. The outer wheels need to go slightly farther than the inner wheels in the same amount of time, i.e. spin faster. If there is no slippage between the two, you get kind of a forcing/dragging of the tires, and in extreme circumstances hopping/chirping. Not desirable for regular street use.

 

This item doesn't look up the diffs, instead it replaces the viscous unit that limits slippage from front to rear of the vehicle. On sharp turns the left and right wheels can slip w.r.t. each other as they normally do however the front and rear diffs (the pinoins & carrier) are now forced to turn the same speed. So, in a sharp turn, the rear wheels trace a smaller circle than the fronts and it will feel like your driving a 4WD vehicle as the tires intermittently break loose as they are forced to slip.

I woundn't recommend such a product for anything but a drag car.

 

I see now. what about for dyno purposes?

 

I think it would be great for dyno or drag race only purposes. I talked to the guy thats making these - On the DSMs you can simply unbolt the rear trans cover and the VCU is right there - it apparently can be swapped in like 15 minutes, transmission in the car. Unfortunately the same is not true for the 3S - our rear cover does not come off with the trans in the car, and it is a much bigger deal to get the VCU out. So it would be a "permanent" mod for the 3S - no way to easily switch back and forth. Thats not good.

 

Damm Jim you beet me to my next question. I was wondering how hard it would be to replace it in our cars so I could take my car to a dyno in Milw. 15 min swap would have been great.