I'm not denying tuning boxes don't work because I think properly engineered boxes with their own looms, so they collect various amounts of data from the engine do work. A MAF sensor fooler doesn't.

I used to work for TUV Sud. All i caution is that people might not understand what TUV approval means - I see it a lot. There's all kinds of approvals and certificates you can get. The TUV approval of the DTUK boxes applies to its roadworthyness under German automotive laws. The product is tested to ensure it doesn't incur any safety issues or alter the emissions of a vehicle - In Lehman's terms, to check it won't cause a vehicle to fail it's MOT. It doesn't mean the product is an approved performance enhancer, independently verified. The test specifications also state engine service life is not considered in the scope of the testing performed, nor is a validation of power differences. 2015 Range Rover Autobiography 4.4 SDV8

JayGee wrote:

garyRR wrote:

Do the tuning boxes work or do harm? I'm not talking about cheap ones, I'm talking about the DTUK and TDI Tuning ones which are c.£400 and come with their own looms.

Another remapper I forgot to mention is Mapro in Portsmouth. They use a proper rolling road.

They will only harm your wallet. If the ECU gets a whiff of anything being too far out of spec it will throw you a restricted performance warning and end your fun. Tuning boxes were great for old diesels where you could just over fuel and leave a cloud of black smoke behind you but once DPF's came in the parameters to fool the ecu into creating more power are limited. If you do go for a remap I'd strongly advise a specialist LR tuner as they will have the experience to know not just how to create power but also how to maintain DPF function. I'd expect a proper retune to also include changes to the gearbox programming as well for optimal drivability and economy. Even just a gearbox reprogram on it's own would likley help.

As I said - speak to BAS (Bell Auto Services). 2012 TDV8 Vogue (L322)

but I'm still a bit mystified why someone would think the shifting or throttle response is slow on a TDV8 4.4. I'd say the shifting is not optimal vs revs and torque and probably programmed for emissions and economy over drivability and hence why I'm increasingly using the paddles but when I do the shifts are near instant and way better that on the ZF6 speed on my old Audi with paddles which I never used. 2012 TDV8 Vogue (L322)

This:

shifting is not optimal vs revs and torque and probably programmed for emissions and economy over drivability


Just because I want to improve it doesn't mean there's a problem  2015 Range Rover Autobiography 4.4 SDV8

Have you tried sport mode? 2012 TDV8 Vogue (L322)

Im surprised you had issues with it. What car was it? Did Andrew sort you out with the return?

I’m following this thread with interest…

A few months back I enquired at a few places for ECU and gearbox remaps and options. Bell Auto stated that we cannot flash via our IIDTools as it’s an ECU out and workbench update. Not a major issue as I had the same on my 3.0 tdv6 RRS (a little tip… don’t watch them do it! It worries you how precarious the process is )

I also asked places about a gearbox remap, and was told it’s not possible on the L322 (at least for the 4.4 tdv8… don’t know about other models).

My reasoning for these requests were to improve throttle response from the car, and if you increase torque you should ideally tweak the gearbox to ensure it works properly with the increased power… rather than it simply accommodating the increase.

However, in the last year of owning and reading these forums, I am pretty sure I’d get significant improvements in cleaning the gunk from the throttle body and cleaning/replacing various sensors.

I also plan to replace my gearbox oils. Once all that Is done and everything is running as it should, I’ll reevaluate what I want. Currently driving: 2012 L322 SE Overfinch 4.4 tdv8

Past rides:
2014 Audi Q7 3.0d (good riddance)
2010 L322 Autobiography 5.0 Supercharged
2011 L320 HSE 3.0 sdv6
2014 Jaguar XF-RS 5.0 supercharged
2007 BMW 535D
2005 Mini Cooper S

https://www.fullfatrr.com/forum/topic59478.html

Saab 9-3 TTiD. Surging power delivery and unstable speed control. Andrew tried to fix a few things but I think I ended up selling it on ebay. The map wasn't that much more expensive. 2012 TDV8 Vogue (L322)

Oh very surprising as wasn’t that a commo. Vauxhall and Isuzu engine? I think I’ve even seen it in some boats.

Fffr to make it even more controversial for some. I think you would really like a pedal box. I was a total non believer but got one send to try it out. I ended up paying for it to keeping, and othered another one for the Mercedes-AMG GL we had at the time. I still can’t comprehend why it works, but is just does.

Ensure that the ecm is at the latest level. My April 12 build wasn't and the driveability improvements after updating to the latest level were significant, which included keeping the torque converter locked at lower engine revs on light throttle. However IMO there is room for improvement in torque converter and gear selection management from standstill when using more than very light throttle, particularly noticeable taking off uphill or when towing.

Avon Tuning, Celtic and Rhino, all respected companies perform ZF 8HP tuning.

There's an article on Celtic's site for work they've done on BMWs with the ZF box: https://www.celtictuning.co.uk/news/261-bmw-zf8-gearbox-ecu-remap

I will contact them tomorrow and update the thread with what they say re Range Rovers. 2015 Range Rover Autobiography 4.4 SDV8

Bl4ckD0g wrote:

I was a sceptic until I used a DTUK box in direct comparison on the rolling road and in everyday driving. Then I got to know the company and the owner behind the company and the source of their products and distribution. Proper TüV certified products, and automotive looms. Great base maps, and they made me a specific one for my specific needs and car when towing the powerboat. It become so popular in the scene that it made it as a standard optional map.

Sadly my supercharged isn’t the car for their products but otherwise I would without a doubt. Quality shops like blackboots in Chesham are resellers. And with together with respectable Litchfield tuners they were the first to get the Yaris GR stuff on the road. A small marker and nearly all of them run that now.

I hit 11.87s on Santa pod in my otherwise standards Golf R five door hatchback 🤣

You know Andrew, or 'Abyss' as he used to go by?

Had the old DTUK Green on my 1.9 CDTI Astra H and it went like off a shiny shovel. Was stupidly fast. Did eat the gearbox eventually though. 2011 4.4 TDV8 Vogue SE - 'Black Betty'
2000 4.0 P38 HSE - 'Green Goblin' - Gone.
Audi..Mini..BMW..

Bl4ckD0g wrote:

Fffr to make it even more controversial for some. I think you would really like a pedal box. I was a total non believer but got one send to try it out. I ended up paying for it to keeping, and othered another one for the Mercedes-AMG GL we had at the time. I still can’t comprehend why it works, but is just does.

Cheers Bl4ckd0g, I’ll have a google and a nosey at them.  Currently driving: 2012 L322 SE Overfinch 4.4 tdv8

Past rides:
2014 Audi Q7 3.0d (good riddance)
2010 L322 Autobiography 5.0 Supercharged
2011 L320 HSE 3.0 sdv6
2014 Jaguar XF-RS 5.0 supercharged
2007 BMW 535D
2005 Mini Cooper S

https://www.fullfatrr.com/forum/topic59478.html

GraemeS wrote:

Ensure that the ecm is at the latest level. My April 12 build wasn't and the driveability improvements after updating to the latest level were significant, which included keeping the torque converter locked at lower engine revs on light throttle. However IMO there is room for improvement in torque converter and gear selection management from standstill when using more than very light throttle, particularly noticeable taking off uphill or when towing.