KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby Toyota1968 » Fri Dec 04, 2015 8:00 pm

Confused myself here - are we looking at plate or torsen diffs from kaaz
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby eric thompson » Fri Dec 04, 2015 9:52 pm

I did it. The Rep will send it to Japan to demonstrate the interest this has gained in just 1 short week. Hopefully more people on more forums sign up as well.

This will be a plate type lsd... 1.5 way front diff and 2 way center. KAAZ was the actual manufacturer of the TRD unit everyone wants in their car. There is a post on here that has a completely disassembled TRD unit showing the clutch plates front and center....

This is the best thing since sliced bread for our cars!
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby kevzep » Fri Dec 04, 2015 10:56 pm

Toyota1968 wrote:Confused myself here - are we looking at plate or torsen diffs from kaaz


Kaaz dont make torsens, they mare plate LSD manufacturers.

Quaife make Torsen/Helical LSD's
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby alltracman78 » Fri Dec 04, 2015 10:57 pm

So off the shelf Kaaz parts will fit a TRD diff?
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby eric thompson » Fri Dec 04, 2015 10:59 pm

According to KAAZ rep, yes. Plus, if diff gets produced, they will offer service parts for at least a few years.... According to what I was told and posted a few pages back.
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NEED ONE MORE FOR STREET:)
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby mkernz22 » Sat Dec 05, 2015 4:24 am

eric thompson wrote:According to KAAZ rep, yes. Plus, if diff gets produced, they will offer service parts for at least a few years.... According to what I was told and posted a few pages back.


Should put the link to the Google doc on your main post, will make it easier for others to find ;)
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby eric thompson » Sat Dec 05, 2015 3:37 pm

mkernz22 wrote:
eric thompson wrote:According to KAAZ rep, yes. Plus, if diff gets produced, they will offer service parts for at least a few years.... According to what I was told and posted a few pages back.


Should put the link to the Google doc on your main post, will make it easier for others to find ;)


Done
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NEED ONE MORE FOR STREET:)
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby TRDTurko » Sat Dec 05, 2015 7:11 pm

just wondering what a 2 way center would cause the car to behave like? I know 2 ways in the rear are more for drifting and are not great for road racing. which is what i want mine for. My assumption would be that it wouldn't make the car squirrely under braking since the front and rear diffs distribute the power they get. The other thing is how will the 2 way affect people who are rallying and want to do hand brake turns. I know that was talked about in the upgraded vicous center thread. (ie if the diff was too stiff you could not use your hand brake any more)
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby kevzep » Sat Dec 05, 2015 8:15 pm

TRDTurko wrote:just wondering what a 2 way center would cause the car to behave like? I know 2 ways in the rear are more for drifting and are not great for road racing. which is what i want mine for. My assumption would be that it wouldn't make the car squirrely under braking since the front and rear diffs distribute the power they get. The other thing is how will the 2 way affect people who are rallying and want to do hand brake turns. I know that was talked about in the upgraded vicous center thread. (ie if the diff was too stiff you could not use your hand brake any more)


Thats a very good point, since my centre is locked I can't use my handbrake anyway, but the benefit of the extra traction under power and braking exceeds being able to do a handbrake turn anyway.

I wonder if you can specify whether you get a 1, 1.5, or 2way?

I know I had to specify when I ordered my Cusco rear LSD......
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby eric thompson » Sat Dec 05, 2015 8:27 pm

I've done some research and every center diff I've seen from KAAZ or CUSCO is a 2way... My guess is that since a 2way works on accel and decel it has to be 2way otherwise the rear diff would be eliminated under deceleration... I could be completely wrong though. As far as ebraking, the center diff has to be disconnected to avoid stalling engine or damaging your driveline... This is done electronically on modern AWD cars... We have to press our clutch pedal to do so...
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby kevzep » Sat Dec 05, 2015 8:57 pm

eric thompson wrote:I've done some research and every center diff I've seen from KAAZ or CUSCO is a 2way... My guess is that since a 2way works on accel and decel it has to be 2way otherwise the rear diff would be eliminated under deceleration... I could be completely wrong though. As far as ebraking, the center diff has to be disconnected to avoid stalling engine or damaging your driveline... This is done electronically on modern AWD cars... We have to press our clutch pedal to do so...


I'm cool with a 2way, unless the LSD is hydraulically controlled like the EVO7 and onwards for example, you simply wont be doing handbrake turns.
Clutching it will disconnect the engine so you wont stall, but the rear will still be connected to the front....

I have been rallying on a locked centre diff for many years, I have tried viscous once, and I pulled the damn thing out straight away.

What people need to understand before getting into specifics and theories, is to go fast, you need traction (accel and braking), so anything that slips, will lose traction and therefore less power will make it to the ground, and you can lock up etc etc.
I have been there, I have been rallying in my ST185 since 2003, I have tried a number of things to improve performance, and I keep saying it, but the biggest performance improvement was Locking the centre diff.

Does it make it hard to drive on the public road with a locked centre at normal speeds? Not entirely, only at intersections, maneuvering it in the driveway and such, the tyres scrub a lot, but hey, you cant have everything....
I can put up with all that for the increase in performance.

Does it make it understeer, in some situations yes, but in the fast stuff, no not at all, but the idea in the tight turns is the throw the car in sideways so you 4 wheel drift around the corner using less steering input and more momentum based turning balanced with power of which now I have close to 450hp at 7800rpm...

How will the 2 way LSD be by comparison to a locker? while its at maximum limiting, the diff will slip when it needs to, so I imagine the car will be quicker in the tight stuff, and it will be easier on hairpin turns...

The ST185 Group A cars from 1993 (Castrol livery), had a development with their Xtrac transmissions and diffs, the centre was hydraulically controlled so when the handbrake was applied, it released the the centre so the rear could be used to do handbrake turns...Previously in the repsol ST185 they were viscous, and in the St165 the centre was locked.

At the end of the day, this package will give our GT4's more traction and so better acceleration, more stability in corners under acceleration and braking. The car will be a lot faster and a lot easier to drive by it being more predictable and stable.
You will wear tyres out quicker though, but you would expect that will all the extra traction....

My comments are based on 20 years of rallying and the experience of trying things over the years with my car, I am not theorizing here....

Not a very good video, but the only one I have of a hairpin, so this is with my locked centre, and the cusco 1.5way rear LSD.
https://www.youtube.com/watch?v=otjn0e00siA
ST185 Narrow body Rally Car
ST205 engine transmission
Stocked with lots of go fast goodies....
400+bhp depending on boost.
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby Empiremen » Sat Dec 05, 2015 11:46 pm

Such a good thread!
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby mike@td.co.uk » Mon Dec 07, 2015 5:20 pm

Hi folks,

Having been following the various threads about these units for years, we have been working away to find a solution to the lack of an LSD for the Celica GT4/Alltrac.

We have been in talks with many differential manufacturers ourselves over the years, and communication went stale with almost all. However we have some news which hopefully should be music to some ears!

We have secured an exclusive deal with Quaife Engineering over here in the UK and we have a limited batch of Quaife ATB Front & Centre LSD differentials being manufactured at present :D . These will be a DIRECT FIT front/centre replacement and will feature a Quaife lifetime warranty like all of their other ATB units. Will can also supply Genuine diff bearings to go with them if needed. Anyone who hasn't had the pleasure of driving with a Quaife ATB, these things are a fantastic piece of kit. Strong, built to last, low maintenance and silent in operation.

These are due to be completed in late March/Early April 2016. I will post up pictures and so on once I have the units in stock, and from that point we can look to sort out any payments and shipping for anyone who is interested and i'll get a proper thread put together.

Costwise, initially looking to cost you guys over in the USA circa $3000USD plus shipping from the UK. Circa £2000GBP (plus VAT if you're in the EU).

Its taken a bloody long time to get here, but finally there will be an option. Looking forward to getting my ST205 apart and trying one of these out for sure.

If anyone has any questions, then please feel free to fire me over a PM or email me direct on mike@tuningdevelopments.co.uk

Many Thanks

Mike
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby eric thompson » Mon Dec 07, 2015 5:51 pm

Taking the wind out of my sales(sails) That's a pun :)
ST165-PARTS-RED
ST165-SCCA STU ROADRACING-(RALLISPEC'S ST165)
NEED ONE MORE FOR STREET:)
https://www.youtube.com/watch?v=w-RCuV_Hmqk (ITS miata 6spd,4.78 rear, shitloads of fun!! multiple wins and track records in 2014)
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Re: KAAZ Front/Center LSD combo. SERIOUS FEELER!!!

Postby kevzep » Mon Dec 07, 2015 6:08 pm

Should start your own thread really....

Some people like me who are using these for motorsport purposes don't want helical (torque sensing) diffs.
They tend to break and the way they perform doesn't suit rally situations in particular.

However they are great for a road car.....
ST185 Narrow body Rally Car
ST205 engine transmission
Stocked with lots of go fast goodies....
400+bhp depending on boost.
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