RRS 3.0 blowing smoke (lots of it)

Remaps are always sold as good clean fun, but the reality is a lot of modern vehicles are quite highly strung from the factory.
It's very easy for tuners with the right equipment (ECU reading cables/software and winols) to alter the maps or even dump in maps they have bought pre-tweaked.

But it is very difficult, time consuming and expensive to work through the engine and drivetrain to find what is a safe limit and what isn't. Because it's too hard, they simply don't. Many are relying on their customers to do the testing and sometimes it can take a long time for problems to show.

There certainly are good tuners out there and also engines with factory tunes which can be safely improved upon without problems.
My work car is an efi diesel and one I have remapped myself. But I do this knowing exactly what I am risking. Currently it's pretty risk free, the car doesn't even have a turbo. But next week my spare engine, new turbo and gearbox should turn up. I also have boost and egt gauges ready to go in.

There is no way I would run a remapped engine (even one I remapped myself) at altitude, towing or in hot climates without EGT and boost gauges.

Do the Aus/NZ spec 3.0 RRS have a DPF? The dealers tell me the current D4 3.0 doesn't, but the coming 8 speed version will.

DPF's are pretty standard on modern diesels, the D3 has 1 so I would have thought the D4 would.
From trolling the net/Web thing I think there are 2 types, 1 that burns off the particles by producing very high temps & a type that has to be cleaned at service.
Our Pathfinder had a burn type that wouldn't burn, had to be replace, just 1 of 100 problems with that car.
Jonesfam

My 3.0 D4 is not fitted with a DPF although the first batch built were for EU certification purposes and some of those were in Australia's 1st shipment. The 3.0's DPF can be regenerated whilst driving by late injection of extra fuel which causes the catalytic converter to heat up sufficiently to burn the accumulated particulates in the DPF but can also be done using diagnostics if driving conditions aren't sufficient.

Thanks.
I wonder how they get the D4 past emission standards?
From my reading, & lets face it the net/web thing is not 100%, the DPF gets the large particles out?
It is some time ago I looked into this so I could be miss-remembering.
Jonesfam

IIRC the 3.0 needs a DPF to meet the EU5 standards. The 2.7 doesn't and that's why they are not available in the UK any more.

Yes, diesel particulate filter.

The 3.0 TDV6 is built to two emissions specs.
EU4 has no DPF.
EU5 has a DPF.

Which one is currently being sold in Aus and NZ?

I understand that Australia hasn't adopted EU5 yet so there shouldn't be any 3.0s with DPFs apart from those initial few.

Back to the Chip.
I am lead to believe that most modern engines are de-tuned (I know that the 3.0Lt is) and are capable of handling more power & torque.

The extra power & torque added by a chip is only ever for short bursts and installed correctly shouldn't raise EGT's beyond extremes.

Please correct me if I am wrong.

Cheers, Craig

Quote:

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Originally Posted by Disco4SE

Back to the Chip.
I am lead to believe that most modern engines are de-tuned (I know that the 3.0Lt is) and are capable of handling more power & torque.

The extra power & torque added by a chip is only ever for short bursts and installed correctly shouldn't raise EGT's beyond extremes.

Please correct me if I am wrong.

Cheers, Craig

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The people who would know how "detuned" the engines are the engineers who designed and calibrated it. These are never the people telling you it's safe to just crank it up.
The safety margins that exist in the engine tunes to to compensate for events like hot ambient temps, higher altitude and sustained high load (towing for example). If you want to use this margin and more on a daily basis, then it's not there to protect the engine and it's parts when you need it to.

Look back at what 3 litre diesels used to do. Not even 100kw or 300Nm and not that long ago. Now we are looking at double that. Everything in the engine, on the engine and between the engine and wheels is working a lot harder than it used to. At the same time engines are getting lighter.


A wise man from another country was thinking about a different method (lpg fumigation) when he wrote this, but it's perfectly applicable.
"It's like giving Grandpa speed then taking him to the gym and seeing how much he can bench-press. Over and over again."

The "short bursts of power" works for a diesel running a very hot tune in a small and light car. They can literally only use full power for a few seconds and they are well past the speed limit. Few hills will keep a light diesel car at full load either.
But we aren't talking about small and light cars. We are talking 4wd's which weigh close to 3 ton empty, are often loaded up with a lot of gear and tow more than their own weight too.

Safety margin. Yes please.

I'm certain there is a Jag sedan running around with a variant of the same engine with twin turbo's. It produces more power and torque.

However, as previously stated this outcome was part of a design by LR/Jag engineers, so all considerations had been taken into account.