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Reprogrammed ECU |
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Rettopian
 
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  Member No: #1195
Location: Wiltshire |
Hi folks, I'm new to the forum - so treat me gently! I'm on the verge of purchasing a 2009 2.7HDI & wonder if anyone has has a 'superchip' upgrade to their car & if so what has been your experience? What are the pros/cons? Have you seen any dicernable change in performance or fuel consumption? I'm not looking to boost performance significantly - its more a matter of trying to reduce the cars apparantly slightly thirsty nature! Also - I travel about 20-22k Miles a year - do the cares stand up to higher milages well? All comments gratefully received. Thanks. |
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C6Dave
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    Member No: #1
Location: Northumberland |
To add a 'chip' to the C6 is difficult as the connector is way down the back of the engine. Most simply overfuel the engine to boost power anyway, so won't get you better mpg. To get one 're mapped' (the best way) is not cheap either as it can't be done via the OBII port, you have to open up the ECU to do it. If your doing a lot of motorway miles in a C6, stick to the speed limit and have a light right foot, then some owners have achieved 40 mpg It's urban driving that drinks fuel in a C6. |
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smihaialex
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  Member No: #1031
Location: Bucharest |
I agree with what Dave says - the C6 2.7 HDi V6 is the type of car that goes through 5.3 litres of diesel per 100 Km at 130 Km/h (80 Mph) while going through 14.5 liters of diesel per 100 Km at 60 Km/h (37 Mph)  Sam |
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Tjensen
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 Member No: #954
Location: Bergen |
Tuning: In C6 we also have the challenge of the max torque allowed by the gearbox. Little or no room for more. | ||
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gmerry
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 Member No: #21
Location: Scotland |
Generally the car will thrive on higher mileages. Only downside maybe tyres. Regards G |
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Rettopian
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Member No: #1195
Location: Wiltshire |
Thanks all. So in short - don't mess would be the message? As a matter of interest - what is the maximum torque capacity of the gearbox? I'm also told that the starter motor needs attention at about 4 years & that the front suspension needs all the pivots replacing at about 70k miles at a coast of £700-800. Is that your experience? The DPF also needs to seem a fluid top up at 80-100k miles at a cost of £250 ish - again is this a familiar story? It comes down to a desperate desire to buy a C6 but having run a Skoda superb for teh last 4 years that has has nothing go wrong of any importance - I'm used to metronomic reliabilty! What goes wrong with these babies? |
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Bishop
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 Member No: #868
Location: Harpenden |
Rettopian: I have dallied with a Superchip for around 10k miles. It does make a difference to the power delivery (notably stronger pull once the engine has hit its stride) and the fuel economy is definitely c. 10% better. I don't find it that hard to fit, once one has located the plug into which it has to be attached. It's a a bit fiddly (no fat fingers ...) but took about 15 minutes first time around, and less than 5 subsequently. It's currently been left off the engine since I had the car serviced, but this is down to me wanting to test the differences with the car without the chip. The only noticeable downside is that the gearbox is definitely less smooth on some downshifts - it's a bit like when the car is in the Sport pattern on the gearbox - and given comments about the torque limits of the Aisin gearbox, that gives pause for thought. Otherwise, a deteriorating fuel filter induced problem aside, my C6 has been reliable and characterful transport for about 23k miles now. I switched out of a Subaru Legacy which was a paragon of reliability over 100k miles and had some nerves about taking on the C6, but I just had to own one. When I collected the car there was a minor problem with the adjustable ride height (which proved to be a problem with the warning indicator on the Navidrive and not the suspension itself), but otherwise it's a delight: I tell people it's like owning a classic car but will all mod cons and my family adore it. Overall, I'd say that one risks little by buying and trying - there seem to be plenty of people out there who are interested in buying privately relative to the actual supply numbers. |
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Rettopian
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Member No: #1195
Location: Wiltshire |
Thanks All. Does anyone know the torque capacity of the box? |
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smihaialex
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Member No: #1031
Location: Bucharest |
I'm guessing 500Nm would be the absolute max...  Cheerios, Sam |
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C6Dave
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Member No: #1
Location: Northumberland |
On the 3.0 it handles 450nm at 1600 RPM, whilst the 2006 2.7 was rated at 325 lbft (440nm) @ 1900 RPM 500nm may be to close to the limit with front wheel drive although the Jag XF with the 3.0 engine is rated at 500nm but with rear wheel drive. |
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Tjensen
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Member No: #954
Location: Bergen |
I think 45kg/m is max for the gearbox and also the max output from the 3,0 Hdi engine. | ||
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Rettopian
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Member No: #1195
Location: Wiltshire |
On wikipedia I read that teh gearbox has a torque capacity of teh wonderfully precise 324.5lb/ft - in which case if the engine produced the claimed torque Citroen were pushing cars out of teh factory with gearboxes that were incapable of handling teh output from day 1. How have they coped with teh 3.0 tdi with its slightly higher torque output? or was it a different 'box? | ||
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C6Dave
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Member No: #1
Location: Northumberland |
Wikipedia is not exactly the most accurate resource out there and you can't believe everything on it. | ||
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smihaialex
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Member No: #1031
Location: Bucharest |
Actually no, because if my calculations are correct 324.5 lb ft is the same as 440 Nm which is the max output of the 2.7 HDi V6... So it's not exactly inaccurate, more like outdated in the sense that it probably hasn't been updated to reflect the changes to the gearbox brought on by the introduction of the 3.0 HDi V6 Cheerios, Sam |
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