D3/D4 Power Upgrades up to 300hp on the tyres

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Originally Posted by Dougal

Can anyone show me a diesel engine anywhere in the world that reliably produces 100kw per litre of displacement?

They did call it a fact right?

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The BMW M series triple turbo 3.0 puts out nearly 100kw per litre. 280kw and 740NM in fact.

300kw at the wheels from a motor that in standard form makes 180 - 183kw at the flywheel and in high performance tune in the Jag does 202kw does seem to be a bit far fetched.

BMW M Performance Line: Tri-Turbo Diesel 5-series, X5, X6 for Europe and Power Packs for U.S. X6 | Car and Driver Blog

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Originally Posted by Geedublya

The BMW M series triple turbo 3.0 puts out nearly 100kw per litre. 280kw and 740NM in fact.

300kw at the wheels from a motor that in standard form makes 180 - 183kw at the flywheel and in high performance tune in the Jag does 202kw does seem to be a bit far fetched.

BMW M Performance Line: Tri-Turbo Diesel 5-series, X5, X6 for Europe and Power Packs for U.S. X6 | Car and Driver Blog

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Yes nearly 300kw. But it has three turbos to do that. The one with two turbos only does 200kw and 600Nm. Which isn't far from the original 180kw/600Nm of the SDV6.

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Originally Posted by JayBee75

Agreed

After having years of tuning experience in performance cars, I assume the car was individually tuned on the dyno, rather than a generic map being applied for the d4?

A lot of companies use generic maps however in mass produced cars these days the tolerances and power outputs vary considerably, not only from manufacture but how they are run in and their lives to date to the point of tune. I have seen differences of up to 40rwkw in factory cars.

If it has been tuned to the car, most engines these days will cope with a reasonable increase, however you WILL reduce the lifespan of the driveline. The weakest link you will find will be the transmission which will either need strengthening via a valve kit etc at a specialist transmission place, or regular servicing, however this does not guarantee anything. Just remember the increased power needs to go through the driveline components and being 4wd will be soaked up via the transmission or diff, whatever the weaker point.
I know there are differing opinions, and this is mine, purely based on years of experience in this area, many types of tunes even back from piggyback days, to the development of edit tunes on factory ecu's.

Enjoy the car as these tunes also,can iron out small imperfections in the factory tune give smoother power delivery, better fuel economy, tuned to personal needs and obviously more power.

Cheers

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JB!!! It's fordboy!

I was wondering if you were over here since you bought your D4!

At the risk of re-opening the can, does anyone have before/after experience remapping the TDV8? I know it sounds ridiculous to ask, but I'm actually interested in better fuel economy (and therefore range) under normal conditions. Could be cheaper to strap on a couple of jerry cans? :D

Remap options I know of for the 2010 RRS TDV8 are

- Bluefin/Superchips
- Autologic
- BAS
- Roo Systems (?)

Cheers

I would suggest you speak to BAS...

I have the Roo systems ECU remap plus twin 3inch exhaust; per dyno it was an extra 37kw at wheels and I think about an extra 150nm of torque on the 4.4TDV8. Sounds sensational(!) under load. Quiet at light throttle. No measurable change in economy. I'm hoping the EGT's are lower - but no gauge to confirm - as we are towing a heavy off road van (Bushtracker 21 foot). In summary, no complaints after 20.000kms since the remap.

Thanks that's really interesting - pretty impressive. Not in the same league, but when I had my old TD5 remapped it also ran way better, and I was also impressed that the economy was unaltered, but I don't think I've heard anyone say they've actually got better economy as per the claims of many remappers. I know there's the temptation to use it if you have it, but we all know our fave cruising stretches and what we can expect...