Has anyone here had a BMM (8v pd tdi) remapped?

I'm not concerned about power, more how many mpg were lost in the EGR and injection timing over optimal. I know they've got a lot better at keeping fuel economy while meeting emissions targets than they were 3 odd years ago.

I've been looking for info outside skoda and the main car I can find with this engine was an A3. But information there is thin on the ground too.

The fuel economy isn't a problem, I just can't help myself.

Yes but had the dpf removed at the same time so not a good comparison. If you keep the DPF research mapping carefully as any more soot wont be visible from the exhaust but will clog the DPF quicker. Without the DPF & remapped the mpg is better , not massivly but it is now much more driveable & you loose the sluggishness when changing gear whilst accelerating hard which feels likle turbo lag, its not , its the phased way the fuel comes back on when you change gear even if you stamp the accelerator to the floor. The fact that they phase fuel introduction on hard acceleration & run the smaller injectors than the non DPF Octavies would lead me to believe that the DPF is running fairly close to the limit. If you go for a DPF removal its a bit of a mare as the transfer box has to be dropped if you want to reuse the old pipe & just knock the inside out of it

So what does yours use at ~60mph on a flat road now? I can't get below ~5.5 l/100km (~50mpg) on the instantaneous readout on a flat road at 100km/h. That's not bad, but I'm pretty sure it can do better.

I wouldn't bother with the DPF removal until I had a good reason (like DPF failure or a clutch job). But I'm thinking if you take the EGR out then soot production at part load will pretty much disappear and the injection could be advanced a bit further to gain a little.

Yep but as per Stuart J above mine was done as part of a DPF removal due to DPF related issues. I keep a long term log of my fuel consumptino but don't have it with me at the moment (SWMBO has the car and it's in the glove box) but fuel consumption is (I think) better than before. I had a spirited drive down the M1 not long ago at decent motorway speeds and got mid-50mpg's as an average on the trip computer. I've not worked out from fill ups yet though but can do if you want.

The best bit, as suggested above though, is the improvement in driveability - the car feels much less restricted and is far more petrol-like in it's delivery. It has also lost that 1st gear flat spot that it seemed to have when pulling away from standstill.

Oh and on a 4x4 it 'can' be done without removing the transfer box (mine was) but I beleive it was still pretty involved and did require a bit of brute force to wedge things apart enough and leave space for the DPF to be dropped out.

Edited 9 October, 201213 yr by skomaz

If you can average mid 50's then that's significant. I can't even maintain 50.

Just to confirm and clarify I checked my figures last night (I'm sad - I record each tankful and have done for years!).

On the motorway runs I was talking about I was doing about 80 to 85 mph and was still getting mid 50's as an average for those particular journeys.

However, for my overall average the figures are somewhat lower given most of the use is short journeys or round town (my wife makes use of the car during the week). Over the last five tanks of short journey town use prior to the dpf delete and re-map the average was 36mpg. For the 5 most recent tanks of similar use it is 40.2mpg. I make that an 11% increase.

Just to confirm and clarify I checked my figures last night (I'm sad - I record each tankful and have done for years!).

On the motorway runs I was talking about I was doing about 80 to 85 mph and was still getting mid 50's as an average for those particular journeys.

However, for my overall average the figures are somewhat lower given most of the use is short journeys or round town (my wife makes use of the car during the week). Over the last five tanks of short journey town use prior to the dpf delete and re-map the average was 36mpg. For the 5 most recent tanks of similar use it is 40.2mpg. I make that an 11% increase.

Is that a PD or CR?

Just to confirm and clarify I checked my figures last night (I'm sad - I record each tankful and have done for years!).

On the motorway runs I was talking about I was doing about 80 to 85 mph and was still getting mid 50's as an average for those particular journeys.

However, for my overall average the figures are somewhat lower given most of the use is short journeys or round town (my wife makes use of the car during the week). Over the last five tanks of short journey town use prior to the dpf delete and re-map the average was 36mpg. For the 5 most recent tanks of similar use it is 40.2mpg. I make that an 11% increase.

I see your is a 4x4 but not the scout, so you'll have smaller wheels/tyres and perhaps a different engine. Can you confirm your engine code? BMM is 8v PD, BKD is 16v PD and CR's usually start with a CB.

Edited 10 October, 201213 yr by Kiwibacon

My 4x4 is a BMM 2.0 PD 8v 4x4 6 speed box on an 07 plate - same as a Scout but no plastic nappies. I wouldn't have posted on this thread if it wasn't a BMM :think:

However it does have a lot of options from the factory so you are right it is not on the 17" Scout wheels - it's on 16" optional Apollons and 205 55 tyres from the factory.

Fuel figures and MPG are calculated from the log that I keep in the car of every tankful that goes in listing date, odometer reading, cost, volume and mpg (I have one in each car and have been keeping them for some 20 odd years) and are calculated using 4.545 litres per gallon...