I'm no expert but I don't think so. The torque limit is kind of a fail safe set in that if x amount of slippage occurs the engine is derated to prevent/reduce damage to the transmission. If they designed the car to produce X amount of torque then they probably set the torque limit 5-10% higher (or whatever %) just to give some headroom but it was still low enough to not cause any damage. That limit is still lower than the maximum tq lmit of the clutches so in some cases you can increase power and increase the limit and still be safe. The people with upgraded power are experiencing slippage because the clutches were not design to withhold that kind of torque they are producing (hence the reason for the torque limiters once again) so the clutches slip but because the limiter has been raised you don't get any engine derate just slipping clutches . It's no different than a manual stock clutch slipping after X amount of torque.

 

Unfortunate if true...

Guess the car will remain (mostly) stock til I trade it in on something faster.

 

Nope majinfajita is correct. South Side Performance has confirmed. The ECU that monitors the transmission senses over limit torque and opens the clutch packs causing the transmission to feel like the clutches are slipping. It is a safety feature of the transmission, to prevent damage to the clutch packs.

The upgraded clutch packs can handle the torque but the ECU still thinks they have exceeded their limits, so it opens up the clutch packs until the torque has been reduced to safer limits. The torque limit is around 300-320 ft-lbs of torque, which is about a 45-50% increase over stock numbers.

You can theoretically put down 500 hp with 300 wtq and still be good, but once you exceed the torque limit the clutch packs open up again and you lose power.

An ECU fix is in the works and some really good people are working to reprogram the ECU to increase the torque limit so that the clutch packs will not open up at the wrong time. Once that happens we should see some impressive performance from the car in terms of flat out 0-60 and 1/4 mile times. Until then we will be stuck, even with the transmission upgrades.

BTW, even with the torque limit feature AMS managed to shred the TC-SST on their Ralliart...but then they were running an FP red! AMS never got the upgraded clutch packs from SSP because they had to give the car back to Mitsu.

Even so, by my estimates it will cost upwards of 5K to get the transmission done with all the upgrades from SSP.

That includes the 500hp clutch packs, upgraded DCT seals, transmission cooler with pan, and Pro Red transmission fluid...and of course labor.

 

I think that you are on the right track. The ECU does disengage the transmission after a cut-off point. However, from what it sounds like, some of these transmissions are actually slipping. The good question is why.

 

Mathematically you cannot unless you sustain 300wtq until almost 9000 rpm.

At a more sane (and possible) 7500 rpm, if you can sustain 300wtq then you can make 428whp.

The SST logic is mainly based on torque calculation that the ECU sends to the TCU. There is also some error correction through the boost control system as well that the SST uses and some other interesting things.

Once you up the actual calculated torque limits (which is currently possible) you will run into the actual hardware limits like exceeding the physical torque limits of the oem friction material.

- Bryan

 

do some research. I experience no slippage at all.

The whole idea that people with 250 ft lbs have this magic slippage at command is just silly. They either drove the car stupid and are paying for it, or havent a clue what slippage is.

 

Well, I'm dealing in theory, your dealing in math.

What are you doing surfing the net, you've got a brand new Whiteline anti-sway bar that needs installing and reviewing!!!

 

So am I right to say that any competent ECU tuner should be able to tune the TCU as well? Can the TCU be accessed from the ECU or does it need a different software reader?

 

They are still working on "cracking" the TCU for re-programming. I suspect it won't be long.

 

I stand corrected I didn't realize the TCU opened the clutch packs. Should be interesting to see what comes of this as more and more people become involved.

 

i heard one of my friend in here just blow his tranny when tuning his MR.
i will get more info from him when i chat with him again ..

 

Hello,

The software is the biggest holdup right now for the sst trans. Mechanically I think they will hold up well.



To convert to dog box will obviously require a clutch pedal conversion and a 5 spd trans etc. etc.. Unless you are planning to make over approx 600-700 I would just hold out for awhile and see what they are able to do with the software issues. Several tuning companies are working on it.



Thank You

John Shepherd

Shepherd Transmission Inc.

Sales@Sheptrans.com

soo i guess shops are trying to crack it

 

thats an email i got back yay!

 

i think this sst trans is made from germany like DSG of VW's. tuners already cracked the gti DSG trans so why not ours(SST TRANS). i think our cars have so much potentia,l just wait i guess

 

This stuff is nothing new. I think that we all get that the computer is a hold-up. However, I wonder how much of a hold-up it really is. That was the point of this thread. Apparently, you can get past this issue with reinforced internals.

Intuitively, this is how I see the balance of computer to actual structural stability:

75% Construction/Materials - 25% Computer Control

If you guys see it differently, I would be interested to know. I honestly have nothing to base that on, other than prior experience with other transmissions/clutches.