Thread: What happened to your Discovery 2 today?

Originally Posted by mylesaway

Yes, do it! Works very well.

I trialled a few before I got it right though.

For the record mine is a mid '99 build D2 with a Stage(2?) upgraded ECU with a hybrid turbo using a V8 Low Compression unit (part no; UHC 100 350 )

Tried a D2a unit ( part no: IGG 000 070 ) = didn't really make a lot of difference.
Tried a D2a(?) High Compression unit (part no: IGG 000 040 ) = didn't like the gear changes and seamed a bit erratic.

Received my IGG 000 040 a couple days ago, put it in about an hour ago and me and the dog went for a spin, it was a bit erratic so popped home and plugged nano in and reset the learning curve.

Went back out and was better but it is not consistent on upshifts even under same throttle conditions and actually a bit too quick to change down on throttle movement and holds on to the revs too long under the same conditions the td5 tcu would have changed up into a higher gear.

At 80 I could previously put foot down and accelerate to 100 in same gear but this unit is touchy and drops a cog straight away expecting to rev instead of using the torque.

It is very good on light throttle with earlier changes and putting around at 60 doing about 1350 rpm is nice, even putted up a railway overpass where the TD5 controller definitely does not.

I will give it a tank full or two to let it learn my driving style and see how good the adaptive learning (??) is.

The "adaptive learning" is only really learnt shift pressure to have shifts completed in a certain timeframe/smoothly.

It won't really adapt to your driving style.

Shift points will not change, downshift will not change.

Originally Posted by mylesaway

I think an electric water pump and electric fan theory deserves a whole new thread of it's own.

A lot to discuss- pros and cons....

You are probably right, once fitted which I will detail, will definitely do it, suppose with the dearth of information on it across the D2 world it is a technology many are not willing engage in. Interesting many car companies are now using them without fanfare.

As I noted the airflow and waterflow aspects are intertwined and not really able to done as effectively with a static fan and linear water flow system (obviously the D2 viscous fan does this marginally to one degree, not two).

That it will be done with a full upgrade of manifold, vnt turbo, intercooler, egr removal and turner head will not really be able to give an accurate summation let alone base line comparison (if it works of course lol) but suppose if it works for these modifications would certainly work on a standard D2 TD5.

That said, will not be towing big rigs where the greatest benefit could be felt.

Should also note I am going the full hog, removing the thermostat (the 10% bypass pipe as well which will be replaced with a low coolant alarm and temp probe on the upper pipe) which is then controlled by the EWP controller.

Originally Posted by shack

The "adaptive learning" is only really learnt shift pressure to have shifts completed in a certain timeframe/smoothly.

It won't really adapt to your driving style.

Shift points will not change, downshift will not change.

Well that is interesting because it was downshifting harshly as i would come to a stop and upshifting bit too firmly but after I went home and reset it I immediately noticed it was much smoother.

Was only 15 minutes or so of driving last night. May take it out for a spin today.

I will see how it fits in with my driving style, but I won't modify my driving around the tcu programming, if it doesn't suit me out it goes and original unit back in until I come up with something else, or one of these clever chinese crowds comes up with the 100 dollar compushift clone.

Originally Posted by johnp38

Well that is interesting because it was downshifting harshly as i would come to a stop and upshifting bit too firmly but after I went home and reset it I immediately noticed it was much smoother.

Was only 15 minutes or so of driving last night. May take it out for a spin today.

I will see how it fits in with my driving style, but I won't modify my driving around the tcu programming, if it doesn't suit me out it goes and original unit back in until I come up with something else, or one of these clever chinese crowds comes up with the 100 dollar compushift clone.

As I said, it won't adapt to your style, it will adapt to the condition of your transmission, so shift points won't change, up shift or down shift, but it will adapt to make shifting smooth. I'd suggest if the shifts were very rough, the car it was from probably had a worn trans requiring high pressure.

Originally Posted by shack

As I said, it won't adapt to your style, it will adapt to the condition of your transmission, so shift points won't change, up shift or down shift, but it will adapt to make shifting smooth. I'd suggest if the shifts were very rough, the car it was from probably had a worn trans requiring high pressure.

Yep I got that it won't learn my style, but I have to drive more to get to know it's style.

It was much smoother after I cleared it, so by what you're saying my trans is hopefully not as trashed as the donk, since it doesn't need as much pressure as the tcu had learned from the previous box?

The tcu was 39 bucks plus 8 delivery so took a chance.

Originally Posted by johnp38

so by what you're saying my trans is hopefully not as trashed as the donk, since it doesn't need as much pressure as the tcu had learned from the previous box?

That's a fair assessment.

Originally Posted by johnp38

Received my IGG 000 040 a couple days ago, put it in about an hour ago and me and the dog went for a spin, it was a bit erratic so popped home and plugged nano in and reset the learning curve.

Went back out and was better but it is not consistent on upshifts even under same throttle conditions and actually a bit too quick to change down on throttle movement and holds on to the revs too long under the same conditions the td5 tcu would have changed up into a higher gear.

At 80 I could previously put foot down and accelerate to 100 in same gear but this unit is touchy and drops a cog straight away expecting to rev instead of using the torque.

It is very good on light throttle with earlier changes and putting around at 60 doing about 1350 rpm is nice, even putted up a railway overpass where the TD5 controller definitely does not.

I will give it a tank full or two to let it learn my driving style and see how good the adaptive learning (??) is.

I tried this same TCU last week again just to see why I wasn't happy with it originally.

Can confirm that mine dropped out of 4th on the slightest inclines or light acceleration. Gear changes not as smooth as my other V8 TCU (UHC100350).

According to my parts book the one you have is for EU & UK. Parts book shows the one I'm using as R.O.W (Rest of World)

From my research the Part Nos best suited are UHC100230 UHC100350 UHC000020 IGG000050 (all V8 ROW TCU's)

Do yourself a favour and try one of these, you'll be surprised how much better the driving experience is.

cheers...