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[Varche]

My 4x4 has a Peugeot 2.0 Hdi engine. The 90 bhp version (DW10)

I have been looking at maybe having it chipped using a reputable outfit. There is a distributor about three hours drive away where I could have a replacement ECU and keep mine rather than the faff of doing it online (£99) a bit cheaper. The Pros are pretty impressive .33% increase in power maybe 3 mpg better fuel economy. I wouldn't want the stage2 option that gives you a further 5bhp. 

Here is typical blurb
Stage 1 Remap 90 BHP models - 120 BHP

This remap is designed to go straight on to a standard HDI engine without any modifications required. Peak power will be 120 BHP @ 3750 RPM, maximum torque will be 270Nm @ 2500 RPM. The stage 1 remap offers great performance, driveability and safer overtaking. On top of this you can expect to see economy gains of 3-5 MPG on average. Cost: £99.

Stage 1 Remap 90 BHP models - 125 BHP

This remap is designed to get the most out of your 2.0 HDI 90 engine with minimum modifications required. To run the 125 BHP remap you'll need to remove your catalytic converter as a bare minimum. For optimal results, fit a complete free flowing exhaust system (2.375"-2.5" bore). This remap is designed to suit engines with less than 135K miles.

The full power stage 1 remap will give 290Nm @ 2500 RPM and a peak horse power of 125 BHP @ 3750 RPM. This will really transform your car and make it a pleasure to drive. All remaps have been proven through years of testing and are perfectly safe for your engine to run. You can expect to see economy gains of 3-5 MPG on average. Cost: £99.

So the pros seem overwhelming.

What about the Cons? Presumably you don't get something for nothing. I can think of three concerns.

Is it more likely to wear your engine out and expose any weaknesses like head gasket ?

It will definitely be harder on the clutch. I had a new one two years ago but do a lot of low speed stop, start, move on - each day.

The 135k miles is interesting. Mine has done 108k miles. Is that an injectors issue? Presumably that is around the point when they wear out. They seem horrendously expensive and I believe aftermarket items aren't recommended so much as S/H low mileage genuine.

Anyone any thoughts or experience?

[Field Marshal Dr. Opti]

I can't speak for derv drinkers, Mr Varche........only cars that burn proper fuel

However, I encountered many problem when I tried to remap a turbo proper fuel car.

Constantly deciding to go into limp mode being the most frustrating.

[Field Marshal Dr. Opti]

....and I couldn't see/find the claimed gains in power and torque.

Having said that I understand that Turbo diesel cars respond best to a remap. 

[Marks DTM Calib]

Normally straight forward, wind up the boost and wind up the fueling.

Don't expect to see any real world mpg gains, the tuning normally just knocks out the consumption calculation figures which makes them appear better but they rarely if ever are.

Tuning boxes are by far the worst for this.

[Andy B]

.....

Anyone any thoughts or experience?

Cons ...... It's French 

[05omegav6]

Depending on the age of it, 110-120 bhp isn't unreasonable as that's what the 406 does from stock... so presumably a case of identifying what's different and applying it to your engine

[henryd]

Depending on the age of it, 110-120 bhp isn't unreasonable as that's what the 406 does from stock... so presumably a case of identifying what's different and applying it to your engine

My 406 was chipped to 130 bhp at 180 k miles,now at 240k and still going strong

[05omegav6]

Depending on the age of it, 110-120 bhp isn't unreasonable as that's what the 406 does from stock... so presumably a case of identifying what's different and applying it to your engine

My 406 was chipped to 130 bhp at 180 k miles,now at 240k and still going strong

Was it just the chip or was anything else required?

[ronnyd]

.....

Anyone any thoughts or experience?

Cons ...... It's French 

Pro,s? Na, it,s French.

[JasonH]

I've looked into re-mapping in detail and I think I could now remap a car on my own (not dared do it mind you...)

On a diesel it is very easy. There's ample fresh air so all that's needed is to increase the amount of fuel injected. There are various maps that set limits on how much fuel is allowed and you just shift the levels up. Because there's a fair bit of engineering margin in the car design you generally get away with it. Especially if the same engine is available in a higher state of tune anyway.

I suspect the 135k is just an arbitrary limit to stop people blowing up older (more fragile) engines.

I can't see how MPGs are improved except for (a) placebo effect (b) you probably modify your driving.

The power gains are definitely real and the downsides are only badly done maps that can produce lots of soot and trigger various faults. A good map should give you a real and safe power increase.

[henryd]

Depending on the age of it, 110-120 bhp isn't unreasonable as that's what the 406 does from stock... so presumably a case of identifying what's different and applying it to your engine

My 406 was chipped to 130 bhp at 180 k miles,now at 240k and still going strong

Was it just the chip or was anything else required?

just the chip ,mine was 110 to start with though

[05omegav6]

Depending on the age of it, 110-120 bhp isn't unreasonable as that's what the 406 does from stock... so presumably a case of identifying what's different and applying it to your engine

My 406 was chipped to 130 bhp at 180 k miles,now at 240k and still going strong

Was it just the chip or was anything else required?

just the chip

There you go then Varche, speak to Henry, job jobbed

[henryd]

Depending on the age of it, 110-120 bhp isn't unreasonable as that's what the 406 does from stock... so presumably a case of identifying what's different and applying it to your engine

My 406 was chipped to 130 bhp at 180 k miles,now at 240k and still going strong

Was it just the chip or was anything else required?

just the chip

There you go then Varche, speak to Henry, job jobbed

Varche,stage one is plenty,it'll transform your Suzuki(I thought they were all 110 anyway but maybe different in Spain)

[Varche]

No before the Santana factory closed they fitted the Pug 1.9 and then the 2.0 DW10  for 3 years.

[Marks DTM Calib]

I've looked into re-mapping in detail and I think I could now remap a car on my own (not dared do it mind you...)

On a diesel it is very easy. There's ample fresh air so all that's needed is to increase the amount of fuel injected. There are various maps that set limits on how much fuel is allowed and you just shift the levels up. Because there's a fair bit of engineering margin in the car design you generally get away with it. Especially if the same engine is available in a higher state of tune anyway.

I suspect the 135k is just an arbitrary limit to stop people blowing up older (more fragile) engines.

I can't see how MPGs are improved except for (a) placebo effect (b) you probably modify your driving.

The power gains are definitely real and the downsides are only badly done maps that can produce lots of soot and trigger various faults. A good map should give you a real and safe power increase.

Bit more to it than that, the diesel engines run with an excess of air to improve response time to step changes in load/demand. Hence why they tend to smoke far more when you boot them after some poor tuning.