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Discussion Starter · #1 ·
"LSD" option I can make happen and soon, read full post before commenting please:)

I have some strong points in this thread for good reason so please read it through with the understanding I am working to help us all out and want to keep this on the right note and move forward as soon as possible:)

"LSD" why written this way?

Because many naysayers about what it can, can't, won't, last, work, etc...........I have heard it all.

IF YOU HAVE SOMETHING NEGATIVE TO SAY, back it up with FACTS or please do not post unless you can substantiate what you have to say;)

If you do have Facts to back up what you wish to post then by all means I really want to hear them, of course:):)

Phantom Grip

I have had great personal experience with boosted FWD cars using them. I have sent them a diff from a brand new car and had a working unit sent back to me within a week, back in 2002. I built a super fast, Street Mod class, the first turbo charged 1ZZ Matrix, anywhere, and needed an LSD but none were available so I gave it a try and it simple WORKED, amazingly well.

That is my ex red Matrix on their home page by the way:)

I have owned many LSD units and the PG was the smoothest, most linear and easy to drive and it worked exceptionally well on all types of surfaces, hot asphalt, concrete, cold and sandy, wet, snow, packed dirt, gravel.....The only other diff I know that works as smoothly, meaning you can drive faster into and out of corners, is the big bucks OS Giken and I bought one of those before as well.

I have had three custom built BMW diffs, one race and one street custom Vette, full JDM STI drivetrain under a Forester XT, several Miata race and street cars, Scion and the Matrix with PG, and more, gear driven, disk, etc.....so a bit of experience with LSDs though of course as always there are those that know more, have had more, etc....that is part of life......

I have no vested interest in this other than I want an "LSD" and have used several of these since and always loved the results.

Thousands of units have been installed in cars all over and thousands have been totally satisfied with the results.

I have only had one person ever even come close to convincing me they had a problem caused by one of these units, it was a very high powered RWD car with slicks and an old diff so what really caused it is impossible to really determine.

Every other internet gossip story I chased down ended up in he said, she said, rumors, period.

AGAIN, if you have something negative to say then post facts to back it up, please, I am working to help everyone get something that works, does not need the diff setup but a specialty tech, and costs around $350, not start a thread filled with nonsense.

I have been trying to get the exact model number of the transaxle in this car to see if they could match up anything they have done for another car but no luck yet so I might pull my diff out and send it off to them.

Once done then it does not take long before they are in stock.

If you are interested in getting a great working "LSD" for a great price, easiest to install(taking apart a transaxle is not for the faint of heart but once to the diff the unit is a simple install) then this is the only option there is and it can happen rather quickly.

I am retired, I have several parts I could make happen under my brand name and start an ST business easily but I am only doing this to help others and myself get great parts for our particular needs, any vendors want to step in and take over I am more than happy to offer advice, contact info, or just stand back and let it roll......

Let's hear what you have to say, thanks:)
Rick
 

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Discussion Starter · #2 ·
We need a separate drive train forum;)
 

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Discussion Starter · #4 ·
I hope it is easier than the Matrix transaxles I have done, have to take them all apart to get the diff out, a tedious job ensuring all parts go back in just right and absolutely scary! One thing wrong and break it or take it out of the car again.....lots of fun work to say the least.

But, the ones have done all came out fine

I am getting hooked up with the full printout of the instructions from a local source for free!
 

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If you're going to transform your FiST into a track with a substantial power increase I can see people wanting this option, but I still think the TVC system is going to be better for light tuning street use and occasional track days. There was another thread a while ago that was talking about the Quaife LSD where I posted a video that put the TVC in the Focus ST against the LSD in the Mazdaspeed 3 and the TVC did a much better job at applying the power evenly to the front wheels (less torque steer basically). There's also potential for an introduced LSD causing issues and codes for the TVC system, along with reduced gas mileage.

Aside from that I wouldn't want to crack open my trans case if it's not necessary, especially under warranty.
 

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IF you drive in the snow or on the track you will see the flaws in TVC you still will spin one wheel either in the corner or just trying to go straight where as a LSD will make sure you spin both wheels and get max traction. in stock form our cars are fine without but start pushing them and it is easy to see and feel where the added grip would be helpful.. as the the process itself yes it is not for the faint of heart but personally I don't want to wait 3 years to play hard.. As side note I did price a new IB6 trans and it was only about 1700 plus shipping of ? and a 600 core charge from Ford.. not the end of the owrld but more than I want to spend at this point..
LSD + TVC = SMILES lol
Not for everyone for not a bad thing either..

Here is a read from Chalon at PCA-1 with a engineer about a brand of LSD and the TV system
I had the opportunity to ask an authority about the interaction of the Quaife and TVC. This is coming from an ST owner installing a Quaife ATB differential in a few months, who is an automotive engineer since 2000 and is currently the Technical Project Manager at Robert Bosch LLC for Chassis Control Active Safety - North America :

What is it that has you wanting the Quaife ATB diff and do you have concerns about the interaction of the TVC and the Quaife?

No, I’ve no concerns. The Quaife (or other ATB) and the TVC (e-diff) are complimentary. The Quaife active wheel (driveshaft) torque biasing is “faster” and offers better granularity, in that it is not dependent on active brake pressure increases/decreases at the wheelends. Unfortunately, brake applications generate heat, so with (particularly) track use (frequent TVC activations), heat is being put into the brakes, both on vehicle deceleration (under braking) AND acceleration. Not ideal. And, as the brake temperature changes and the rotor/brake pad clearance (retraction/knockback) changes, TVB performance varies. Actually, the combination of an ATB and TVC is beneficial, as the ATB cannot bias torque in the case where one wheel has low/zero normal force (axle torque), as is the case with weight transfer causing a lifted or near-lifted wheel (or riding curbs / dropping a wheel). In this case, TVB brakes the unloaded wheel, permitting again torque transfer via the ATB. The Wavetrac ATB also functions in this way, by generating internal friction to “brake” the unloaded driveshaft. For that reason, the Wavetrac is a great choice, but (so far) no FST application and the potential added maintenance/complication of changing bias ratio friction material. Ford SVT chose the Quaife for the ST-R. It was a well-thought choice and reason enough to trust the application.


Is the Quaife worth it for a street car?

Is it worth it? That is, of course, for each individual to determine. It is certainly my primary interest in tracking the car, that makes it quite easy to rationalize.

Is it beneficial for a street car? In my opinion, yes. The vehicle is more driveable/ more “predictable”, due to better torque biasing response and lack of brake temperature, caliper piston retraction/knockback influence.

Is it a “must have” for solely street-driven vehicle? Honestly, my answer would be no. If I only drove on public roads, it would be hard to justify. It’s just too difficult (and typically illegal) to use the vehicle hard enough on the street to substantially benefit.
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Straight from the horses mouth. I found the discussion on TVB, Torque Vectoring by Braking, to be the most in depth information on this topic I have read.

It has been clear from the start this upgrade is not for everyone and a very select few actually do this upgrade, which historically has always been the case. Now, at least we know what the benefits of the Quaife are and the performance issue of TVB.


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Discussion Starter · #8 ·
Superb rear, thanks!!!!!

All the more reason to do it as well.

I have the tools and can even make some specialty ones if not to complex if needed. I am getting the pages from the manual locally and I have done a few of these in different cars so nothing hard, just tedious but maybe this one is easier I might not have to take the all the gears, use pullers, etc.....

Yes, removing it from the car is a pain, worst part of FWD by far!

I am having a blast playing around with this car, got the parts for the exhaust in today, cat is so big it will not fit the ATP downpipe so I ordered the parts and building my own so selling a brand new ATP one.

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Lowered weight, BBK, 8.8" wide DOT slicks, coilovers, ATP turbo upgrade, 20-30 minute all out track sessions in sometimes very hot weather......I will need an "LSD" for certain.

Thanks again, great help here:)
Rick
 
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