Chip for 300C

NVP

NVP

NVP

Soldato
Joined
6 Sep 2007
Posts
12,804
Hi guys,

My Dad owns a 56 plate Chrysler 300C CRD 3ltr V6 diesel (just in case spec is needed for advice) and it is quite bad on fuel and the auto gearbox is very sluggish.

Someone has told him that he can get a chip (£300 including fitting) that will decrease his fuel consumption as well as increase the performance (although I doubt it can do anything to increase the responsiveness of the gear change).

Now I'm not really sure on chips, I thought they just remap the ECU, but apparently not all of them are for remapping. My Dad said the chip is supposed to vary the amounts of the fuel injected and thus improve efficiency. My gripe is that if that is what the chip does how can it also improve the performance? And his response was that it was something to do with the fact that they sell their cars globally and thus have to account for fuel of poor quality, but here in england with good quality fuel it can be changed to reduce consumption AND increase performance...

How does that work? Can anyone give me an explanation as to how this chip actually works and what it actually does? Also if there are better mod's that can be added to decrease fuel consumption as well as improving the performance slightly? The performance is fine as it is (although it loses pulling power at the higher speeds) but the automatic gearbox is terrible, are there any ways of making it more responsive?

Thanks

NVP
 
The problem he has is a heavy car, a not particularly powerful diesel engine and a rubbish autobox.

A simple remap isn't going to change the world unfortunately.
 
Yeah that's exactly what I said to him before he bought it, but he likes big cars witha bit of poke and as he does over 100 motorway miles a day to work and back he needed a diesel... unfortunately it is still costing quite a bit to run so any decrease in fuel consumption would be noticed and appreciated.

So can a chip do this? Decrease consumption without decreasing performance? Is £300 a respectable price?
 
Do you really think so? So the difference won't be that noticable?! How much of an increase in MPG do you think would be achieved? Anything above 5 I'm sure would be a major increase.
 
nuvpal said:
How does that work? Can anyone give me an explanation as to how this chip actually works and what it actually does?
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Is always a possibility - a lot of "chips" are just resistors that fool the fuel pressure meter into thinking the pressure is lower than it is, meaning more fuel is injected.

Fuel economy claims are based on having more power, so not having to floor it as much
 
iaind said:
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Is always a possibility - a lot of "chips" are just resistors that fool the fuel pressure meter into thinking the pressure is lower than it is, meaning more fuel is injected.

Fuel economy claims are based on having more power, so not having to floor it as much
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Oh really? That is quite contradictory of them to claim it is more economic due to the car having more power caused by more fuel being consumed. Or is the increase in fuel injection quite small compared to the increase it causes in the performance? Even if this is so, I'm sure for it to have a noticable affect on such a big car it would need a much bigger power increase thus negating the fuel consumption decrease.

So you guys think it's a bad idea then?

[TW]Fox;14760847 said:
Sounds like he should have bought one then :(
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haha! I know what you mean, I told him to at least get a 7-series... But for the fuel efficiency needs compared to the poke he requires the Chrysler is sufficient... Just!
 
It isn't a bad idea, but don't expect to see any real world fuel economy increases.

You might feel a slight power increased via the bum dyno, but in my opinion it isn't really worth it on a car like that. A 730d would've been a much better choice.
 
Oh OK, thanks for the advice. Do you think you could maybe attempt an educated guess at an MPG increase figure? Something I could take back to my Dad.
 
By saying more power it means very little, chances are it will move the torque to a diffrent area (it may have more low down power) by saying chip it sounds like a piggy back chip, which means if its no good its pretty simple to take back and say "remove it".

As for the fuel comsumption it could be down to minimsing emissions aswell due to it being a modern car.

Tell your dad to buy himself a r5 gt like myself..

light car, goodish on fuel and he wont want it any quicker ;)
 
OK here's what my Dad is interested in:

http://www.diesel-performance.co.uk/vehicle_results.php?make=CHRYSLER&model=300C&type=CRD

(Avg increase of 32bhp and 80Nm torque)

And this is how they say it works:

How it Works:
Todays diesel engines have many sensors which are controlled by the vehicles ECU these signals are processed many thousands of times in one second to maintain that the vehicle is running at its optimum efficiency and keeping the emissions and economy at acceptable levels.

The idea behind the tuning box is to intercept the signal between the ECU and the injection system usally the common rail and basically allows it to inject more fuel into the cylinders thus producing more torque and power, and because of this the engine is running more efficiently the fuel consumption is also improved because you would have to use less throttle for similar conditions.

So why don't the manufacturers do this....?
You may have wondered why a manufacturer can have the same engine in different models but they can have different power outputs.

This is not due to the engine mechanics as they are usually built to the same standard, but its down to the software installed into the ECU which governs the engines output.

Manufacturers do this because of the strict emissions regulations and tax bands especially for the company owned driver. Many countries around the world relate their tax levels to the KW output of a vehicle or the emission levels.

Installation:
All DTUK Systems have been designed to be compact and easy to fit they are supplied complete with the correct OEM wiring loom and connectors for the vehicle application and can be installed with the minimal of mechanical ability thus making it an ideal diy project, most units can be fitted in around 10 minutes and they come complete with full support.


FAQ:

Q) Why is your diesel tuning unit better than a chip?
A) Our unit can be fitted in most cases in less than 30 minutes (some 10 minutes) A chip replacement can take half a day or more.

Q) Will it damage my engine?
A) Our units are designed to improve your performance no more than 30%. So no, this is well within the tolerances of most engines. We have never had to our knowledge an incident where our unit has been responsible for any engine or engine related problem.

Q) Will I achieve the figures that are published?
A) Our published figures are generally conservative so as even the under performing or tired vehicles still achieve these figures and every body is happy.

Q) Why will giving my vehicle more power achieve better fuel results?
A) The tuning unit provides more torque through the engine particularly in the low to mid range. This allows the driver to change gear more quickly even with a automatic so as a higher gear is achieved giving better fuel economy.
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It doesn't actually seem to be a "chip" of sorts, but it does sound quite promising although I'm not sure how much it would affect such a big car, but with a plausable average increase of 32bhp and 80Nm torque do you guys think its worth it?
 
yeah them chips things are rubbish they trick your engine into think theres more air than there is which then make the engine work harder. Only problem is that they blow your engine up like my mates 206. You need to get a ECU piggyback unit then you can remap how much power you want that the engine gives. These units are good if you have done some mods like air filter, sports cat, etc.

My mates got 1 on his yaris turbo and its mapped the engine from 105hp to 150hp
 
BD10NNF said:
yeah them chips things are rubbish they trick your engine into think theres more air than there is which then make the engine work harder. Only problem is that they blow your engine up like my mates 206. You need to get a ECU piggyback unit then you can remap how much power you want that the engine gives. These units are good if you have done some mods like air filter, sports cat, etc.

My mates got 1 on his yaris turbo and its mapped the engine from 105hp to 150hp
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iaind said:
When do the schools go back again?
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haha! :)
 
haha im sure that the Yaris turbo would beat whatever youve got and its still economical even though its got a turbo. Plus my over mate has a supercharger on his and well that beats Civic type-Rs and its always funny to see them laugh at 1st then see their faces when they loose to a Yaris. I know ppl are gonna say im talkin bull but think about 140hp on a car that weighs under 1000Kg are the power to weight ratio is a lot better than a Civic
 
the main has a point, my 205 has a standard engine of 167bhp, a quaife front diff meaning great traction around corners, and weighs in at around 700kg's. Bye bye, civic type r's, mild evos, subarus, and most quick common jap crap.
 
BD10NNF said:
haha im sure that the Yaris turbo would beat whatever youve got and its still economical even though its got a turbo. Plus my over mate has a supercharger on his and well that beats Civic type-Rs and its always funny to see them laugh at 1st then see their faces when they loose to a Yaris. I know ppl are gonna say im talkin bull but think about 140hp on a car that weighs under 1000Kg are the power to weight ratio is a lot better than a Civic
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How the hell did a thread about improving economy on a Chrysler 300c turn into some nonsensical ramblings about a supercharged yaris from a 16 year old?
 
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