I'm sure I'm preaching to the choir, but having an LSD, *any* LSD, in your car is one of the biggest improvements you can make, period.

Regardless of which you choose, you'll never regret it.

 

A lot of what I have heard about the different lsd's is from drag racer's which doesn't help the decision based on handling, haowever when it comes to downrigh what breaks and what lasts, it's not a bad source to poll.

Kaaz breaks with a lot of power
ITR lsd breaks with approx 200 whp or 150 tq, of which I top both N/A
Quaiffe is probably the most durable for the money and has a lifetime warrantee no questions asked.

haven't heard anything except what you guys have said on the Mugen



[Modified by speed_daemon1, 2:36 PM 10/24/2002]

 

for most road race applications and autoX applications for us Honda's....we won't be seeing more than 200 HP at the wheels....maybe some of the higher prepped road racers....I'm goin with a clutch type (haven't decided which one, but I like the 2-way Mugen) because it reacts a bit quicker and won't unload if I wheel leaves the ground like a quaife.

 

yeah like mentioned above it is a jdm d15b sohc vtec tranny(S50??). Im not sure what price you got for it, but ive seen the entire tranny sell for 350-400, shich isnt bad. Also, as you might know, SRR makes FDs for our trannys now(4.714, 4.9).

Either way, i would love to know how that set-up works out.


Mike D

 

Does anybody have any comments on the Spoon Sports LSD ?

Great comments so far...

 

Hmmm. Tell me more about this 'unloading' that the Quaife is suppose to do. I am seriously considering buying it but want to know more about it.

 

spoon is the same thing as a kaaz lsd, just relabeled


[Modified by chrisJ, 7:25 AM 10/25/2002]

 

From my little LSD research, I read that the Mugen LSD, along with LSDs from Nismo, TRD, Ralliart are all made by the same company called Hitachi. Their clutch discs are smaller and the number of discs in a pack is less. They rely on stiffer springs to achieve the desired friction (or lockup ratio).

As for Kaaz and ATS, their clutch discs are larger in diameter and the number of discs in a pack is more. The springs don't have to be as stiff to achieve the desired friction. Compare to the Hitachi unit, the engagement of the Kazz/ATS unit would be more gradual and predictable, it would also run cooler and last longer.

For Kings, I can imagine they can race with the Mugen/Hitachi unit with no problem because of how well their shop is prepared. They probably drop and open the tranny several times a season. That's something that amatuer racers are less likely to do (or afford to do).

 

The idea is that the quaife's torque biasing only work with both wheels ont he ground whereas a clutch-type is always engaged. I have serious doubts at how effective the cluthc-type would be in that situation though unless it's got a very high lockup. I've jumped my share of curbs in my car (with a quaife) and I've never seen it as a problem. It's *rumored* that the shock of the wheel sitting back down has the potential to break the Quaife... I don't consider this a concern at all... especially at our power levels.

 

Unh-Unh. Preload is NOT what "achieves the desired friction (or lockup ratio)". Kaaz's own site tells you that.

Take a look at how they actually work - see how the fingers of the pinion interact with the ramps on the pressure rings - THAT'S what increases friction between the disks and plates.

When I asked Scott at King about the service life of the Mugen it didn't include multiple rebuilds per season. In fact he told me that in the life of the Moto Cup / Grand Am car they have never rebuilt the Mugen LSD. They have a regular schedule of gearbox maintainance for synchros and shift forks, but that's it.

Yes - the Kaaz has bigger diameter disks and plates - but if they don't solve a problem, why bother? In fact, if I were the sort of person to resort to the ridiculous to make my points, I might suggest that the Kaaz has unnecessarily high rotational moment of intertia!

Scott, who hasn't heard first hand positive long term racer testimonial on the Kaaz....

 

Altho you asked about Kaaz, but have you tried talking to ATS? I think the guy's name is Yasu? Sorry if I mispelled the name. ATS LSDs use similar construction to the Kaaz ones so he might be able to tell you what you're looking for (positive long term racer testimonial).

 

I heard that clutch-type LSDs have to be "broken in" before they work properly. You have to drive in figure-8s or something like that....?

 

For the KAAZ yes, for the Mugen no.

Some people refer derisively to this as having to do the finish machine work on the KAAZ for yourself.

Scott, who want's a big figure-8 / skidpad out behind the shop someday.....