Best 5eat MOD ever

Just got done installing My Hexmod valve body that I acquired and it has to be the best mod ever! It's been about a week now and I'm never out of boost my fuel mileage went up and I can handle 350HP to the wheels if I so choose...even if I didn't have bolt on's it would still make the world of difference...Thank you Dave for making these and the F1 program...

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Unfortunately I believe he no longer does this,. There is a TransGo kit which is the same (or similar) which he made a write up for.

To be honest I came in here expecting: "Best 5EAT mod.... 6 speed swap."

Last i heard he’s selling some VB’s he had sitting around for ~$750 flat out. Past that most transmission shops can install a transgo shift kit for around $500.

Combine the shift kit with fixing the torque management tables in the ECU and you end up with a DSG

Last i heard he’s selling some VB’s he had sitting around for ~$750 flat out. Past that most transmission shops can install a transgo shift kit for around $500.

 

Combine the shift kit with fixing the torque management tables in the ECU and you end up with a DSG

Any idea on times between shifts? VW/Audi states 0.2seconds I think?

Is there a way to see my shift times logging with AP? I guess I'm a lucky coming across this VB SINCE he don't do them anymore....

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~135ms 2nd-3rd shift in automatic sport mode tonight.

Or in other words, it shifts faster than a GTR.

~135ms 2nd-3rd shift in automatic sport mode tonight.

 

Or in other words, it shifts faster than a GTR.

Forgive me for my lack of understanding but just because the RPMs start to increase that doesn't mean "full" engagement of converter correct?

Between shifts the converter disengages and engages clutch packs?

Without full lock up it isn't a "complete" shift?

Hard for me to imagine whoever first utilized a DSG in a civilian vehicle didn't just install shift kits and stuff of that nature in regular AT's.

The DSG also seems to have a much higher rate of transition from paddle shift input to actual shifting. Other than having the even gears on one load and odd gears on the other, why do they transition between gears from input quicker?

You shouldn't be modeling your shift times based on torqe converter bypass clutch engagment. Except at upper RPM's the TCU actually leaves the torque converter active as it mean more effective torque going into the transmission. A dual-clutch transmission and traditional auto are quite different in this regard.

Your last statement about paddle input to shift time isnt applicable to this discussion, as that's a software issue. We found the BIU sends the shift signals almost instantly (within 20ms, whenever it's next highspeed CAN transmission window is). The problem is the TCU takes it's sweet time to decide to act upon this command. Once it decided to act though, it's capable of shifting the big-o-JATCO 5R05 core lightning fast.

Here is a shift from this morning:

Time	RPM	Shift	Throt	MAP
(msec)		Retard		PSIg
3727	6040	0	100	10.45
3754	6080	0	100	10.59
3790	6120	0	100	10.45
3817	6156	0	100	10.45
3842	6179	0	100	10.45
3877	6175	0	100	10.45
3910	6166	0	100	10.59
3935	6184	0	100	10.59
3962	6160	0	100	10.59
3993	6024	1	100	10.59
4021	5892	1	100	10.74
4053	5422	1	100	11.32
4080	4848	1	100	12.19
4110	4548	1	100	13.35
4141	4399	1	100	14.07
4168	4443	0	100	14.22
4198	4499	0	100	13.93
4229	4606	0	100	13.49
4257	4702	0	100	13.2

The shift retard signal is sent over CANBUS to the ECU to tell it that a shift is in progress, pull timing. From the above you can see the shift (time between clutch pack changes start to end) takes between 148ms and 206ms depending on how you count it. That's pretty damn fast for a 13 year old family car based on 16 year old transmission tech (the 5R05 was first available in 2002).

You shouldn't be modeling your shift times based on torqe converter bypass clutch engagment. Except at upper RPM's the TCU actually leaves the torque converter active as it mean more effective torque going into the transmission. A dual-clutch transmission and traditional auto are quite different in this regard.

 

The shift retard signal is sent over CANBUS to the ECU to tell it that a shift is in progress, pull timing. From the above you can see the shift (time between clutch pack changes start to end) takes between 148ms and 206ms depending on how you count it. That's pretty damn fast for a 13 year old family car based on 16 year old transmission tech (the 5R05 was first available in 2002).

I guess this retains the question of why they're becoming "obsolete" in favor of DSGs?

Effiency, weight, complexity, and cost are all better on dual clutch gearboxes and CVT’s. Dual clutch tends to have better power handeling and a sporty feel, so you see them more on performance platforms. CVT’s are silky smooth and can be more efficient in daily driving, so are winning the mass market applications.

Old school automatics have more or less peaked, and the market is diverging to new solutions for ring the last bit more out of the combustion engines. Transmission will be a thing of the past in 10 years anyway, gas powered cars are going to be banned in a lot of places and all the market innovation will in electrics. Electric motors have crazy wide torque curves, so you don’t really need multi gear transmissions.

@utc_pyro

Is the only parameters to improve the 5eat (aside from VB mods which aren't available on my 09) the requested torque table?

Where is a good read to learn and understand changing that table?

And is it something you think can/should be changed by someone with no tuning experience?

Calculated torque is the important one. Requested torque likely is also at play, but how exactly it interacts vs throttle % hasn’t been confirmed across the board. Requested Torque Lilly matters more on ‘08+ cars with the second gen TCU/Valve body and SI-drive.

You’ll have to add the table to your definitions file. There is a thread over on Romraider about it or I can find it for you. Yes you can DIY this one without any real risk of blowing anything up.

The thread about calculated torque is here :

https://www.romraider.com/forum/viewtopic.php?f=40&t=9358

If anyone needs their ecuflash definition updated to include that table just mention what your ecuid is and I can try to assist if someone has already found the right address.