hachiroku

https://mbworld.org/forums/c63-amg-w...ysixtuned.html

With a engine tune from eightysixtuned shift speeds of the factory 722.9 with torque converter transmission are greatly improved. In addition, transmission 'acceptance' of paddle shifter inputs are instantaneous. Physical shifting of the transmission post paddle input is greatly improved.

With a engine tune from eightysixtuned shift speeds of the factory 722.9 MCT transmission are greatly improved. In addition, transmission shifts respond instantaneously to paddle shifters. Appropriately utilizing the MCT's lightning quick and possibly quicker than AMG's advertised 100ms shift speeds.


Both vehicles have factory original transmissions WITHOUT ANY TCU tunes or modifications from factory. A perfect engine tune will allow the factory TCU to optimize shift parameters and maximize shift speed and directness to the potential of the 'factory limits'.

deadlyvt

Haha I see what you did here 😂👌

Heaven7

Gotta say, looking at that video, the paddle press to actual shift looks like about the same I get with my untuned 722.9.
Actual shifts are quick, but the delay between paddle press and actual shift is the annoying thing that no one seems able to address.

BLKROKT

LOL

I like you Barry but you’re going to have to provide some detail otherwise I call total bullshït. We had this debate on FB already and I’m pretty sure you lost.

The TCU and ECU are totally separate systems, with the TCU running closed loop. How exactly is an ECU tune causing faster shifting than you get with a factory fresh car? I’m not talking about you fixing someone else’s shïtty tune that sent bad values to the TCU. I’m talking about your claim that a car with your ECU tune shifts faster than a factory fresh car. It’s not possible.

Dogtag114

I recall this same conversation on other car forums also. Shift point on the ECU but shift speed 100% in the TCU.

hachiroku

ECU engine torque values are passed to the TCU. when you start adding power adders to the vehicle the ECU's engine torque values no longer match with the TCU's expected torque values. when they are not in sync shift performance will be negatively affected.

BLKROKT

You didn’t answer the question. Again.

”With a engine tune from eightysixtuned shift speeds of the factory 722.9 MCT transmission are greatly improved.”

That’s just a patently false statement. You’re better than that Barry.

hachiroku

our engine tunes pass a more accurate torque figure to the factory TCU.

it may be hard to comprehend, but factory tunes are built with cushion to ensure compatibility across a broader range. maybe the use of the word greater isn't ideal but our tunes do indeed aid in shifting speed and directness due to a very accurate torque figure being passed to the TCU which then translates to allow the TCU to tighten up shifting. if you continue to state our ECU tune cannot pass a more accurate number to the TCU you also would then be stating the factory ECU tune makes the max power possible for any engine configuration which we all know is not the case.

swedepat

Barry is correct.
But i can´t agree on that an ecu tune will improve shifting speed above oem speed(if AMG hasn´t left any on the table).
It is easy to f_ck up the ecu tune and by that confuse the tcu - result is very lame shifting.
Earlier in my AMG history i had a kleeman supercharged C55 with a piggyback to control ignition and fuel instead of ecu tune.
Early in my tuning of that car the gearbox was really confused, this due to i didn´t have the signals correct calibrated(input/output of piggyback), engine was running good, really good thou.
Later on i did a lot of work getting the ecu to send 'unaltered values' to the TCU, and by doing that the gearbox came back to normal.

BLKROKT

Right. I get it. Barry can fix a screwed up tune. Ok, we’re in total agreement (whether other tuners simply skip the step to calibrate torque output to the TCU is another story, I find it hard to believe that the main well-known tuners don’t already do this, would love to see evidence of their sent values versus the tightened-up post-86tuned values, but I digress…). I’m just saying that an ECU tune is never going to INCREASE the speed of the 722.9 transmission. Ever. It’s impossible.

Here’s the problem language:
”With a engine tune from eightysixtuned shift speeds of the factory 722.9 with torque converter transmission are greatly improved. In addition, transmission 'acceptance' of paddle shifter inputs are instantaneous. Physical shifting of the transmission post paddle input is greatly improved.”

None of that is true. It’s just not. And I’m saying that Barry is better than resorting to language like this to sell tunes. Let his ECU tunes stand on their own merits, which by all accounts are far better than most. Don’t become like the others with false advertising and claims that do not exist.

Unless there’s hard proof with timing of shifts and paddle input to shift speeds - which there is certainly not - then this is just more of the same bullshït claims we’ve come to expect from tuners. It’s not necessary or welcome, and frankly a little disappointing especially coming from “one of our own”.

deadlyvt

I've gone thru some tunes from well
known places and they use way too much smoothing and set values on things that should not be generic set values. Also they increase throttle actuation angle per degree of pedal input to make it feel faster but then don't adjust the torque limit at that value so the transmission gets 2 separate map details. As far as it actually shifting faster from a stock car or with less time from you requesting the shift from the paddle I would also say yeah don't see that happening.
Unless the factory tcu has multiple shift maps based on torque output and throttle angle to which you could theoretically just make it one consistent map and receive the fastest possible shift each time you requested it regardless of rpm and or throttle/torque output

alenpepic

Im gonna come out just throwing some stuff out there, and you guys tell me if im wrong.

1)The shift communication from the paddle shifters to the transmissions clutches, is only fixed through a Valvebody upgrade.

2)The shift speed, or how fast the clutches are working to get to the next gear, is determined by aftermarket clutches.

"OR" (in my opinion the correct option)

3)You need both aftermarket clutches and a valvebody to get this modern communicated paddle shift to transmission shift down correctly.

I don't want to compare but like if I could maybe a Toyota supra A8. Lets make AMG's Great again who is gonna be the guy to do it, talk is cheap.

Their using a auto w/ a torque converter and the response from the paddle shifter or the communication is what we are looking for, the c63 shift speeds from the transmission the mechanical part is perfect doesn't need to be faster.

Our goal as a community for the TCU debate is to get the car to operate TCU wise like a toyota supra A8 or a 340i bmw

go team

The TCU is receptive to Star programming the valve bodies and NGS3 (IIRC) programming.

swedepat

Not altering the 'map' huh?
I mean the star programming the tcu.
I´d say you can only adjust some pre programmed parameters?
Not altering the linepressure etc etc.

go team

Mostly shift points. I don’t have it in front of me but I had this screen saved on some of the things you could play with. Also as some people have figured out the 2.65 gear ratio has been faster in the drag because of less shifts to get to the top speed.