Time to look for a TBD, Which is the preferred? Options

[ww914]

I have read many posts here regarding TBDs and I would like to hear some comments on both Wavetrac and Guard, or any other product that is working for you. My 914-4, 2270cc, with stiff suspension on Hoosier A6s, is primarily used for auto-cross. Don't care much about ice, snow or rain as this car will not be driven in those elements.

Thanks in advance for any responses.

[J P Stein]

Forcing both rear tires to turn at the same rate under decell will cause big time underseer. That's NOT what the torque biasing diffs do. They act the same as an open diff under decel, braking or no. The TBD will cause the inside rear tire to spin *IF It COMES ENTIRELY OFF THE GROUND*.....in which case you have a suspension problem. Normally, the TBD transfers the torque to the tire WITH THE MOST TRACTION. The effect of this in a sweeper (for instance) causes the rear to feel like it's stepping out....or the front is tucking in, due to the unequal torque distribution.....*I think*.You have to feel it to believe it.....I like it. One can keep rolling in throttle. Usually one reaches the exit before anything untoward happens. Then the TDB responds by equally (or so close ya can't tell) applying the torque to the rears. The car turns in and rotates great....even in the tight stuff.

Quaife & Guard (I've never driven a Quaife equipped car),I am told, act the same.

Me? I urge my competitors to buy a clutch type LSD. (IMG:style_emoticons/default/biggrin.gif)

[Randal]

Forcing both rear tires to turn at the same rate under decell will cause big time underseer. That's NOT what the torque biasing diffs do. They act the same as an open diff under decel, braking or no. The TBD will cause the inside rear tire to spin *IF It COMES ENTIRELY OFF THE GROUND*.....in which case you have a suspension problem. Normally, the TBD transfers the torque to the tire WITH THE MOST TRACTION. The effect of this in a sweeper (for instance) causes the rear to feel like it's stepping out....or the front is tucking in, due to the unequal torque distribution.....*I think*.You have to feel it to believe it.....I like it. One can keep rolling in throttle. Usually one reaches the exit before anything untoward happens. Then the TDB responds by equally (or so close ya can't tell) applying the torque to the rears. The car turns in and rotates great....even in the tight stuff.

Quaife & Guard (I've never driven a Quaife equipped car),I am told, act the same.

Me? I urge my competitors to buy a clutch type LSD. (IMG:style_emoticons/default/biggrin.gif)

Got to admit it that JP figured out how effective a TBD was before any of us knew what one was. And he was nice enough to share that information with us, something that most won't do.