I would like too know impressions on both.

 

The race teams ditched the Quaife for the Cusco FWIW.

 

For mainly street driving, Quaife. For mainly track, Cusco. I read several indepth technical articles and I don't remember the details (LSD's might as well be magic to me), just the conclusion. I think it was that the more traditional diffs were better for transitions between braking and throttle application. I plan on a Cusco or Kaaz for my track car.

 

Thats what i thought. I read that the cusco is a clutch based lsd and would wear after some time.

 

I have both diffs in my 2 mini's

The Cusco is light yrs better for the track

 

What about street/AX use?

 

as far as AX.... it's truly unfair

the only downer for street use is it makes more noise when cold and can tend to clunk until the fluid warms up when turning hard

will require changing the fluid more than the others

 

but what i'm really asking about is it really okay for daily/track use?
i don't want to have to keep replacing the oil all the time.

 

I'm sure there are many owners on here still running on the factory oil in their tranny. If you are one of them..... then maybe the Cusco isn't for you

 

From what I have read a clutch type if preferred in drag whereas a torque is preferred in road racing. Is this true?

 

there are many different setups for the Cusco

the RSR Grand Am team is using them for Road racing and also have ditched their quaife's

after trying them myself.... I see why

 

And why is that you prefer the cusco over the quaife? What are your driving experiences with both?

 

As I said before.... I Have BOTH!

the Cusco feels like it's on rails while cornering and even if you get a wheel off the ground it still pulls unlike the quaife. I have noticed the quaife to push sometimes while the cusco you can just jump on it much earlier in the corner

 

I have the Quaife...never had experience with the Cusco...though I can see its benefits on a track car. For my daily driver, the Quaife is awesome...I got the same "feels like its on rails" feel after I installed it. I also don't know how the hell people complain about the Quaife not working when then wheel comes off the ground...that really shouldn't be happening if your car is set up properly (FWD car). If you say "well when I bump the rumble strip it bumps it up and I understeer"...ADJUST YOUR LINE

I would skip Cusco though and go striaght to OS Gieken (they are making one for us now aren't they?). Again though...it was an unbelievable difference for me when I got the Quaife in, I'd love to drive one with a Cusco and see that difference for myself. I do trust Jan...but if I were jumping on the gas any earlier out of the corner I'd never be letting off

 

A one sided impression from the Quaife user side.I have not had an issue with this characteristic using the Quaife in street use.

On my vehicle the Quaife creates a wider turning arch under acceleration that you learn to compensate for.

I can't comment on track use but for the street there is enough time and attention available to do this.

MTF-94 will handle a Quaife for 25k fluid change intervals, no problem. My Quaife produces no extra noise.

 

isn't this the point?

 

Of course! I just didn't think it was possible

 

just a data point on the Quaife

100,000 street miles, no issues
works great on the street
60-70 AutoX events, 2 regional titles - no complaints there either

i do not run the car on the track

highly recommended

cheers,

charlie

 

Can anybody also comment on the advantages and the efficiency of factory LSD vs Quaife?

 

I recently changed the oil in my diff. It is one of the easiest things I have done on the mini. If you can change the engine oil, you can change the diff
oil no problem.

Best of luck

 

i can never quite get my head around the concept "better" for many mods,
i can see and understand increase in torque/whp and the relationship with delivery within rev range and how a lower total could be better [ie area under the curve etc] as the difference between good and bad tyres may be only a few seconds a lap, how would you rate these....all these diffs
if we called no diff say 85% and oem diff 100% how much" better" are they to the average joe ?

 

I pointed this out in another thread but a lil comparo we did with GRM on an S2000 between some diffs.
http://grassrootsmotorsports.com/articles/whats-diff/

 

The OEM diff can only transfer about 30% torque to the outside wheel when cornering. Many of these aftermarket diffs can transfer near 100% torque to the wheel that still has traction. An open diff (OEM no LSD) actually transfers power to the wheel that is LOOSING traction.

The difference is tremendous, but an average Joe driver probably wouldn't care. It only really matters when you start cornering hard. Have you ever cornered hard and then tried to get on the gas only to have the wheels spin. Well its actually your inside front wheel, because of inertia your car still wants to go straight, thus the outside suspension compresses and the inside suspension extends. With less weight on the inside tire it becomes easier to spin, with more weight on the outside tire, it can handle more torque before it breaks loose.

I wouldn't call an OEM open diff 85%, I'd call it -100% has it actually transfers power the wrong way. Then you can call OEM diff 30%, not 100%...and the others would be closer to 100%.

The main difference between the aftermarket diffs and how, and the rate at which they transfer the power. Different ways are better for different reasons.

As far as being able to see an increase it hp/tq and how that is a benifit...I'll just say that power is the last thing you need to improve in these cars, several other components need help and looking at first.

Hope this helps.