Difference between tunes?

**AK83** · 7th October 2021, 06:24 PM

Originally Posted by Newlandy

I have a 2002 TD5, have been through the tuning shlep from the "old" to "new" tuning methods, but have never heard of changing the TD5 auto box ecu to a V8 ecu. What does this mod do for the drivability of the car and what is required to get it working correctly?

What part numbers are required?

I think the part numbers 'may' be a bit hit and miss.
From what I've read, some folks get good results from one part number, but others don't using the same/similar part number.

There are two recent threads you can read up on.

One here ... HERE! ... and the other is in the 'what happened too D2' thread from about page 755.
I also remember other threads on the topic from about a year or two ago too .. so it should be searchable(not sure how pinpoint specific the search will end up tho).

Mylesaway has some part numbers listed there, so does johnp38 as I listed the one I had spare too.

it's a great mod for a tuned TD5 that has gobs of low down torque and feels like it's revving like mad for no reason! And there's a possibility that your tune may need a tune again(talk to Shack).

Mine ended up 'good' around town, but not so good(not terrible tho) on the highway, and less usable than the TD5 auto ECU. Shack retuned my ECU(engine ECU) and now it's perfect.

**johnp38** · 7th October 2021, 09:29 PM

Originally Posted by gavinwibrow

Thanks, I have every confidence you will update us when you succeed, and if you find a second one, please let me know.

Ok I will just keep going here as it will tie in to ECU tune

So today I got my UHC 000020 Trans controller (V8 LOW COMPRESSION)

Chucked it in and went for a speed around suburban streets and up hill down dale out on the highway.

Works much much better than the other 2 controllers which were V8 HIGH Compression and were touchy on downshifting and a bit erratic on their changing sometimes. (IGG 000010, IGG 000040)

While it is good enough for me and I have left it in as the mild throttle much sooner upshifts are nice to have, (along with lower speed lock up) I still found it a touch more sensitive than I want out on the highway, but happy to live with it for now.

Much better than the high comp units as I could put my foot down a lot further and use torque for longer to accelerate but even at 110 I could get it to kickdown far too quickly with a bit of spirited overtaking, and I would think towing would be affected (but not tried yet)

So from reading threads in various forums there are many options if you're starting out in order of least effort:

1. Stock tune, stock converter, change to IGG 000070 if you have earlier IGG 100010 to get 4th lock at 80 instead of 83 klicks an hour.

2. Performance tune with change to later TCU as above if earlier disco

3. Performance tune to suit changeover to V8 TCU, stock converter (SHACK tune ?)

4. Performance tune to suit V8 TCU and V8 torque converter (SHACK tune ?)

The preferred Trans Controller Units that have acceptable suburban driving shifting to get from earliest number upwards, all low comp donk, UHC100230, UHC100350, UHC000020, IGG000050

Thanks to all unnamed but very appreciated various forum contributors on the subject .

It would be good to have ECU performance tunes that incorporate the ability to use the V8 controllers as shack has done for arthur but without having to worry about low or high comp differences.

**shack** · 8th October 2021, 12:08 AM

Originally Posted by johnp38

Ok I will just keep going here as it will tie in to ECU tune

So today I got my UHC 000020 Trans controller (V8 LOW COMPRESSION)

Chucked it in and went for a speed around suburban streets and up hill down dale out on the highway.

Works much much better than the other 2 controllers which were V8 HIGH Compression and were touchy on downshifting and a bit erratic on their changing sometimes. (IGG 000010, IGG 000040)

While it is good enough for me and I have left it in as the mild throttle much sooner upshifts are nice to have, (along with lower speed lock up) I still found it a touch more sensitive than I want out on the highway, but happy to live with it for now.

Much better than the high comp units as I could put my foot down a lot further and use torque for longer to accelerate but even at 110 I could get it to kickdown far too quickly with a bit of spirited overtaking, and I would think towing would be affected (but not tried yet)

So from reading threads in various forums there are many options if you're starting out in order of least effort:

1. Stock tune, stock converter, change to IGG 000070 if you have earlier IGG 100010 to get 4th lock at 80 instead of 83 klicks an hour.

2. Performance tune with change to later TCU as above if earlier disco

3. Performance tune to suit changeover to V8 TCU, stock converter (SHACK tune ?)

4. Performance tune to suit V8 TCU and V8 torque converter (SHACK tune ?)

The preferred Trans Controller Units that have acceptable suburban driving shifting to get from earliest number upwards, all low comp donk, UHC100230, UHC100350, UHC000020, IGG000050

Thanks to all unnamed but very appreciated various forum contributors on the subject .

It would be good to have ECU performance tunes that incorporate the ability to use the V8 controllers as shack has done for arthur but without having to worry about low or high comp differences.

And that can probably be done.

What I did is match up all the tuning and controller back at headquarters, then I mapped until I was happy with performance on my own car, then sent that out.

I've done both early and late ones, it is a bit niche, but really satisfying.

I've been messing with the V8 controller for some time, so have a bit of a handle.

I guess it really is a bit of a "bespoke" tuning thing as I ran the whole tune back here to make sure AK83 would hopefully be happy.

But it may well require the same thing again should different ECU versions arise.

I am not across all versions, but earlier on believed there was realistically only 2 V8 versions, one for the 4.0, and one for the 4.6 sold in America, but I haven't done any further research, someone will no doubt classify this.

As far as what I do? I just change the mapping until I'm happy, whatever the version!

Cheers
James

**mylesaway** · 8th October 2021, 11:41 AM

My research shows that there were 17 different TCU's in 6 different 'Family groups' used in the D2.

They are the following...

TD5 EU2

UHC100250 - IGG100010 - IGG000060

TD5 EU3

IGG000070

V8 ROW
Low Comp

UHC100230 - UHC100350 - UHC000020 - IGG000050

V8 EU & UK
High Comp

UHC100260 - IGG100020 - IGG000010 - IGG000040

V8 USA
High Comp

UHC100240 - UHC100360 - UHC000010 - UHC000080

V8 USA
4.6 EFI

UHC500010

Use only "V8 ROW Low Comp" for 'plug and play' in D2 TD5's.

**shack** · 8th October 2021, 06:31 PM

Originally Posted by mylesaway

My research shows that there were 17 different TCU's in 6 different 'Family groups' used in the D2.

They are the following...

TD5 EU2

UHC100250 - IGG100010 - IGG000060

TD5 EU3

IGG000070

V8 ROW
Low Comp

UHC100230 - UHC100350 - UHC000020 - IGG000050

V8 EU & UK
High Comp

UHC100260 - IGG100020 - IGG000010 - IGG000040

V8 USA
High Comp

UHC100240 - UHC100360 - UHC000010 - UHC000080

V8 USA
4.6 EFI

UHC500010

Use only "V8 ROW Low Comp" for 'plug and play' in D2 TD5's.

Thanks for your efforts there, I wonder how the unit you suggested would perform on a stock tune. Have you tried it?

**mylesaway** · 9th October 2021, 12:00 AM

Originally Posted by shack

Thanks for your efforts there, I wonder how the unit you suggested would perform on a stock tune. Have you tried it?

Yes, I have tried it..

MSB101193 TD5 Auto ECU with the V8 R.O.W TCU UHC100350.

It can be driven but performs similar to the 'V8 High Comp' units when in cruise control in that it drops back to 3rd quiet violently.
It can be nursed along out of CC if you are prepared to let your D2 drop back 3-5kmh on the same hill. I had trouble getting used to the lack
of power with the Std ECU.

Also tried..

MSB101340 TRS ECU with the same TCU UHC100350. It has '09/16' written on the cover- presume this is the rechipping date - although I bought in 2018 I think.
This was my second TRS ECU after the first one died after 7-8 years. This one has the same fueling tune Id's as Johnp38's has.

This ECU had no troubles with the hills in CC (100km/hr) although it did drop out of 4th lock-up on the first run. On the second run of the 10km circuit it had no problems.
I put this down to the trans not being up to operating temp and/or the ECU 'learning to talk' to the TCU.

Am running now..

A MASTAZ Full Power with Boost Controller delete. It's a rechipped MSB xxx xxx unit. It says 'boost delete' but that is not strictly true as it will still cut the engine
and the MIL light comes after 30 something PSI boost.

Well..This bad boy eats the hills and idles around town nicely. It seems to compliment the Hybrid Turbo nicely. Works well with HD Torque Converter and the D2a
intercooler and 3" exhaust.

Also have a ....

NNN500030 unit. Bought this originally with the idea of getting a TD5 Inside/ Alive type remap for it. Have been trying to download a EU2 base fuel map (NNW501250)
from the Nanocom site but it's just not happening on my computer. A lack of computer skills maybe part of the problem...
I'll try and persist though....

Note; I'm running standard tyres and only have roof bars (with a mine site bar). Everybody's vehicle will be a bit different..

cheers

Thread: Difference between tunes?

Thread Tools

Discovery 2 EAT Transmission Control Units ( TCU )

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions