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Old 03-16-2013, 06:33 AM   #11
Uncle Scotty
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Join Date: Mar 2002
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Quote:
Originally Posted by FlatironsTuning.com View Post
Just guessing, but helical diff's will act as open diff's if one wheel has no traction. So if you drive a lot in very slick or low grip solutions, a clutch type LSD would offer more grip in those conditions. However, IMO they do not work well on the street or in high grip conditions.

I have been using a Modena front TBD for a couple years now and love it on the track. And I think it does fine in the snow (just drove in this morning in about 1" of slush as a matter of fact...) And it would be very similar the the Quaife FWIW.

One other thing to consider as you are looking at a higher Hp build is that if you have enough power to break the front inside wheel lose in a corner, then the TBD may not be ideal as again in that situation, the helical diff will act as an open diff.. At about 400 whp you are going to be on the fringe of where you might need the front LSD. But if you are using big sticky tires, you may be fine with the TBD.

Also FWIW, if you do decide to run a front LSD, you will have to change your driving style a bit, as that will tend to make the car understeer if you don't change your input to compensate.

Good luck with your build.
Quote:
Originally Posted by Storm View Post
I didn't like the hunting feeling through the steering wheel on ice and low-low grip situations. It wasn't just the Quaife that exibited this, the OBX diff does it too. As mentioned above, Very slick conditions or wheel in the air situations allow a helical diff to act as an open diff. On tarmac though, when you turn into the corner and apply power again, the front end pulls for the apex, instead of pushing out. You are able to get on the throttle much sooner, and increase your exit speed substantially.

For your power levels, you'd still be fine with the Quaife. It's made from very good materials. You will want to take advantage of the rear grip though, as that much power will likely spin both front wheels exiting low speed corners. A DCCD will exponentially transform the car and tie the front and rear diff setup together beautifully.

Jay

thank you both for your input on this......i do appreciate it
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