KAAZ DBT2100 limited slip differential

[Bushi]

I'm thinking about installing KAAZ DBT2100 LSD to my 3s-ge sw20.
Anyone tried this before?

I know mr2 is not a drift car, but i'm wondering how would it be
with this LSD for ex. on the wet surface.

Thanks for any help and sorry for my english.

[Medusa]

Your english is excellent, trust me. It is much better than some of the native english speakers on this board...

Looking at their site, the DBT2100 is a 1.5-way unit. This would be good for a higher powered car on road course racing, or similar uses.

For what purpose are you installing the LSD?

[MR JAS]

i have a turbo lsd gearbox in my n/a car
i am also running 225 wide toyo proxes4 tyres that have epic grip

only downsides are
it makes skipping noises going round corners
it wears tyres a little quicker
mine has so much grip my n/a manages to slip a new turbo clutch under hard launches (never wheel spins)
realistically it doesn't make a huge difference to real world driving because one wheel cant break loose it doesn't lose grip when you don't want it to but when it does spin them it spins both wheels so you have to be quick to catch the drift

[Medusa]

^Sweet quote.

And if you're drifting, you'd be better off with a 2-way.

[MR JAS]

Originally Posted by Medusa

^Sweet quote.

And if you're drifting, you'd be better off with a 2-way.

yea if its road use i would go with either a 1.25 or 1.5 way
a 2 way can be very twitchy on the road if your get on and off the throttle quickly

[Medusa]

I've never heard of a 1.25 way before. What's the difference between a 1.25 way versus a 1 way or 1.5 way?

[MR JAS]

Originally Posted by Medusa

I've never heard of a 1.25 way before. What's the difference between a 1.25 way versus a 1 way or 1.5 way?

its basically how much limited slip if gives under deceleration 2 way means its as limted on accel as decel
1.5 means it limits half as much on decel
1.25 means it limits quarter on decel
1 way means it doesnt limit on decel

[Medusa]

Oh okay, I've just never heard of an LSD being anything other than a 1, 1.5, or 2 way.

But then again, depending on the type of LSD you have, calling it a 1.5 or 2 way doesn't strictly apply. Like a gear-type LSD (I believe the TRD unit is a gear-type), it doesn't lock your wheels together at all. It just transfers torque to each wheel proportionately to the amount of grip each wheel has. I.E. if one wheel has 80% grip and the other wheel has 20% grip (relative to the grip available for that axle), then the LSd will transfer 80% of the torque to the wheel with more grip. Up to something like a 80/20 split or something, I think.

Correct me if I'm wrong, this is all dredged up from hazy memory.

[MR JAS]

Originally Posted by Medusa

Oh okay, I've just never heard of an LSD being anything other than a 1, 1.5, or 2 way.

But then again, depending on the type of LSD you have, calling it a 1.5 or 2 way doesn't strictly apply. Like a gear-type LSD (I believe the TRD unit is a gear-type), it doesn't lock your wheels together at all. It just transfers torque to each wheel proportionately to the amount of grip each wheel has. I.E. if one wheel has 80% grip and the other wheel has 20% grip (relative to the grip available for that axle), then the LSd will transfer 80% of the torque to the wheel with more grip. Up to something like a 80/20 split or something, I think.

Correct me if I'm wrong, this is all dredged up from hazy memory.

yea as far as i know the gear type does do abit better job by perfectly spliting torque to give best grip but it does have a rep for being unreliable they are best suited for use as the center diff in 4wd cars

diffs like the viscous plate and mechanical basically very nearly lock the wheel speeds to one another under load. the amount of load taken to engage it and the degree to which the wheels are locked can be adjusted by adjusting the preload (type of plates in plate diff or type of fluid in viscous) this is because you dont want to be hopping the wheels in a shopping center car park

[Bushi]

Originally Posted by Medusa

For what purpose are you installing the LSD?

I'd like to install it to have more fun while cornering - especially when its wet.
I hope it would help me to do some longer slides.

But it's strange that noone has installed it already.
Maybe the manufacturer in not good?

[Medusa]

Originally Posted by Bushi

I hope it would help me to do some longer slides.

So drifting then? You'll want a 2-way for drifting, but it'll kick your ass if you try grip racing. And drifting in the wet is kind of useless. I know it sounds contrary to the whole idea, but you want as much control as possible and wet pavement will throw off your modulation of the car.

[Bushi]

I only try to drift when it's wet, because i have opened diff. and not enough power to drift on dry tarmac, when it's slippy it's easier to initiate drift, but also - as you said - harder to control it.
Maybe if I change the diff to LSD i will drift also when its dry..
I think the 1.5 way would be enough.
The quaifie helical LSD would be a good option too and i also heard that the diff.
from MK3 mr2 spyder (ZZW30) would fit, it's helical, but i don't know, were they all LSD and would it really make any difference if I put stock differential from mk3 mr2 spyder?

[Medusa]

Like I mentioned earlier, a helical type LSD will not help you for drifting.

A clutch type is your best bet. It is the most rugged style of LSD. You will blow out a viscous LSD pretty quickly, so don't get one of those.

[Bushi]

Thanks Medusa, now i know the plate type lsd is best for me.
But i'm thinking about buying a helical used unit from the aftermarket first, because it's cheaper.

Do you really think it won't make any difference in drifting?
I have the most simple open diff. now ...


@MR JAS - you had a good idea installing turbo gearbox to n/a engine!

Now i know i don't have to install the plate type LSD to my s54 gearbox,
i will buy a turbo gearbox and then do it. The turbo gearbox is a much better heavy duty unit. It have viscous LSD in stock, did you changed it for a plate type?

@ Medusa - Will it really burn quickly?

@ MR JAS - Are there any problems swapping it? It's plug and play, isn't it?

[328FTW]

Is this car taken on the road? I assume you drive it on the road as well but if you were straight up trying to drift it you could lock the diff. Just crack the box and weld up the spider gears. I did it on my mkI n/a and it made a huge difference that thing could hold slides like you wouldn't believe and my mk1.5 gets a locker at some point as well it totally changes the attitude of the car. It is a rugged way to do it but for a dedicated drift (or in my case rally car) it is not a bad bet. Makes the car very tail happy almost comically when combined with rear toe out.

If you drive on the road though DO NOT LOCK YOUR DIFF the first time it rains I guarantee you will die in a car accident it is just dangerous. It is a race only solution that as rough as it is works well. You hear them called spool diffs sometimes they are one in the same LOCKED.

[MR JAS]

Originally Posted by Bushi

Thanks Medusa, now i know the plate type lsd is best for me.
But i'm thinking about buying a helical used unit from the aftermarket first, because it's cheaper.

Do you really think it won't make any difference in drifting?
I have the most simple open diff. now ...


@MR JAS - you had a good idea installing turbo gearbox to n/a engine!

Now i know i don't have to install the plate type LSD to my s54 gearbox,
i will buy a turbo gearbox and then do it. The turbo gearbox is a much better heavy duty unit. It have viscous LSD in stock, did you changed it for a plate type?

@ Medusa - Will it really burn quickly?

@ MR JAS - Are there any problems swapping it? It's plug and play, isn't it?

i believe the turbo box has different axles so if you install the turbo axles hubs etc you wont run into problems blowing up cv joints

also i would upgrade the flywheel to the turbo unit primarily because it is heavier which means when you try to start a slide but punching the clutch the engine will have more inertia to spin the tyres

if you use the turbo clutch , flywheel, gearbox, axles and hubs you should have an indestructable package

also if its seeing drift action reguarly maybe it would be a good idea to do things like using arp flywheel bolts, new syncros and new engine mounts or an engine damper kit

[Bushi]

I'm having new engine mounts, but i dont know what's engine damper kit.
I know, that turbo box goes with different axles hubs, flywheel and clutch,
and you just helped me realised it's no use installing LSD to weak, non turbo transmission. And there are fewer parts to switch when i'll be able to buy a 3S-GTE and swap it.. Thanks

[Bushi]

@ - 328FTW Thanks, I will think about your idea. Mr2 is my second car and i don't use it to go from A to B, i just bought it only to make it tail happy Especially in rain And my sw20 is 90', so it's really tail happy even now because of it's stock "ferrari-response" suspension, which was changed in 92 to a more relayable one that don't gives so much oversteer that i desire
I believe when i do it, the wheels will turn exactly with same speed?
I think it can occur some overpowers on transaxles and brake them, don't you think?
(i'm not sure is "overpower" a good word for this - my english is not perfect)