I am curious to see who, if anyone, is above 340wtrq in their MR. I have been since July and had alot of issues with the SST slipping from 1st to 2nd. But, now it seems as if the SST has some how fixed itself. It's running brilliantly now, shifting solidly at WOT all the way through the box. IF anyone has had a similar experience good/bad, or how the SST is reacting to higher trq i would appreciate any info.

Also, if anyone has info/input on the FP red on the MR please feel free to jump on and discuss their experiences with that turbo set up and how it reacted with the SST.

 

interesting, maybe the ECU have learned how to shift with more power? A interesting test would be restarting the ECU to see if SST would slip.

 

Hmmm... That is an interesting thought, excuse my ignorance, but by "restarting" do you mean reseting? or actually clearing and reflashing? because it has been reset and that has not changed the performance, good or bad.

 

Could have been the EXTREME cold you were having. It was very cold last week and my IX was slipping, it no longer slips now as it got warmer.

 

Define slipping ..

If you mean the rpm goes up by about 2-300rpms when you step on it .. the engine torque demand is set too high ..

The SST is also self learning .. so it will slowly correct itself over time ..

 

definition: Clutch slipping, long delay between gears, complete disengagement of trans. any will do.

define self learning.. lol

 

Well, I was just thinking of disconnecting the the battery for the night! But as someone has already mentioned above, it could be the weather? So far, I have noticed the evo does not like the cold AT ALL!

 

False perception of slipping = what you mentioned ..
Define exactly what you see .. because SST gives that slipping sensation when the ECU and the SST disagrees ..

Definition = learn by itself
The SST stores info on the engine parameters whenever it shifts .. you remap a certain throttle demand / torque demand .. and while you drive .. it attempts to give you what is in the maps + stored data correction factor ..

Here's the issue I find .. every set point has a stored value .. so if you have not driven at that particular point .. it does weird things if the maps are not set right ..

When I changed the parameters .. I wanted a very responsive engine .. but when the SST shifts .. it accelerates , slows down, accelerate again at a particular throttle setting .. ie the transition shifting is very jerky .. over time, it went away ..
so now its back to normal like you said .. but occasionally I'll still get it ..

Apparently the USDM cars are unable to run too responsive a mapping maybe because of differences in the internal subroutines .. I never bothered to find out the differences ..

 

I had the same thing happen to me in my MR. I have a test pipe, cobb intake, and Zchip. After the Zchip was installed, the RPM's jumped when I floored it...kind of like I was giving it clutch if that makes any since. It hasnt done it since that first week though. Thats really cool that the ecu can learn!

Does anybody know how much HP is safe to run on the SST tranny? I'm somewhere near 330awhp and havnt had any problems.

 

thanks for the info,
the sst was definately, absolutly, no arguement, slipping. on several different occasions.and i'm not just talking a little slip,lol, i'm talking about bouncing of the rev limiter because the sst could not engage the next gear at WOT. But like we've said. it has some how come back from tranny dead and is stronger and smoother than ever. My hope is that it is just computer stuff going on and not a mechanical problem/shortcoming of the SST. i guess i'll just have to keep pushing the limits

What exactly did you do to the map? just changing shift points? or a full re mapping of the entire system? and what program did you use? this is the first i've heard about anyone tapping into the programing of the SST. I'm very interested on how this all went down. And how has it held up to the changes?

 

ECUFlash .. I'm disassembling the ROM ..

Well.. like I said .. when something disagrees .. the SST will not engage .. so you get the free rev like slipping .. and the way you described .. it sounded like you're in NORMAL mode when you bounced off the rev limiter as the SST free revs .. in NORMAL mode .. the SST actually allows some slippage for 'smoother' engagement .. the duration of slippage is based on the torque request sent to the engine .. obviously with a modified engine, this signal is no longer the same versus the stock engine ..

 

COLD=Slipping clutch as well. You being in OHIO I am willing to bet it was VERY cold.

 

dude, look, i'm not a freakin idiot. i wasn't in normal, it is always driven in s-sport mode and manually shifted. i know the difference of the three modes. and well we may have to agree to disagree on whether or not it was slipping. even tho i'm telling you it did. but who knows maybe you were there too.

as for cold=slippage... as stated in original post. since it has been cold it has been acting much better.

does anyone have any real help?

 

Take it easy. Gunzo was trying to help. Good luck if he comes back in.

You mention that you always drive in SSport/Manual. Where are you shifting in each gear? Does it only happen between 1 and 2? Have you tried Normal and Sport in auto and manual to duplicate?

 

yea, i know, i'm a hot head. just frustrated. kinda took it out on him. It is quite easy to duplicate in normal auto mode, or manually shifting in normal at wot, it will "slip" through 3rd. i have honestly not tried it in sport because if it did it in s-sport i was confident that is would duplicate as well.