a company in Monaco, dealing with Bentley is offering me a chip flashing.

Pmax will be: 628,2 ch @ 5613 tr/min
max torque will be: 880,6 N.m @ 4799 tr/min

they said that the gearbox/transmission can easily handle it.

do you think is a "risky business"....

 

Hi Ulstrup.

Those figures are just about the same as the 'Supersport'. It has the same gearbox as far as I know, so the increase should be OK.
Do you have a price for the flash?

Regards. Les.

 

Hi Les,

the price is 1500€.
the company name is Frejus auto racing ( www.frejusautoracing.fr/)

they have already done about 15 CGT, surprisingly enough, or maybe not, they have never found the 560 advertized HP on the standard cars, the last one they did:

Origine :
Pmaxmot: 503,1 ch @ 6053 tr/min
CMaxMot: [B]619,6[/B] N.m @ 3045 tr/min

they have a very good reputation and they also have a 4wheel drive DYNO so their before/after figures can be considered accurate.
they only increase the turbo pressure by 0.1b and in my, non expert, opinion this is insignificant.

the main problem is that, due to french/monegasque laws if you modify the characteristics of an engine then your car is not street legal any more and your assurance contract is considered null and void!!

thus I'm hesitating...a lot

 

The price seems reasonable and the power increase should be fine. Here in the States many people pay a bit more (~$4000) for GIAC tuning and you get more HP/TQ. A few here had that done and have not heard of any problems.

 

I agree with Steven, that does sound like a good price.
Didn't know about the French law on engine mods. My missus better keep quiet about her French reg' V70 Volvo then. Having said that, how would they know about an ECU tune.

 

Ok you two, I can understand now how people turn bad with such crime inducing friends!!

I am not particularly concerned about the power/torque increase since the CSS has the same gearbox/transmission, as pointed out by Les.

the figures are similar:
CGT with a chip tune is
p= 628 at 5613 tr/min
tq= 880 at 4799 tr/min

and the CSS
p=621 ch à 6.000 tr/min
tq=800 Nm at 1700 tr/min

having said so the graph below shows that the 560 bhp @ 6000 rpm
and the 720 Nm @ 1800 rpm advertized by bentley doesn't show on the dyno.
the ''tested'' figures, after a few years are:
Pmaxmot: 503,1 ch @ 6053tr/min
TQMaxMot: 619,6 N.m @ 3045tr/min. (and certainly not 1700tr/min)

how would they know Les? by connecting a VAG and checking the Eprom...

anyway, I think I'm going for it and find out what happens then

 

1500€ is a good deal for that increase and always felt GIAC is far too high in price for a flash, even with their hardware that lets you change the programming to flash it back to stock during service. Hopefully GIAC sees this post and lowers their pricing to about $2500 including the hardware to change modes. To me, $2500 is where it should be.


Enjoy the new tune and it's amazing how much power Bentley 'left on the table'.

 

this is included in their price, even better, when you sale the car they flash it back to stock for free....

 

For $2500? The 1500€ he is talking about equals $1700.

 

The tune on my lady's Volvo is by BSR of Sweden. That too can be set to either tuned or factory standard by plugging in the portable programming box that they sell.
I did ask if they were going to do something for the Bentley but unfortunately they are not at the moment.

I have to say that the difference after the tune on her 2.4 petrol Turbo was amazing and the tune, done via the OBD socket, only took about 10 minutes.

Good luck with it Ulstrup.

 

Every time a new company pops up and offers an ECU flash, I ask them for a dyno sheet. There never is one. Some are being straightforward and say they dont have one, some others promise to have one in the near future. Bottom line is, nobody has one. If this company can show you a dyno sheet backing up their claims AND will agree to refund your money if their ECU flash fails to produce results, go for it.

The engine can definitely handle it, not sure about the transmission. Also remember to upgrade your brakes since you will be going faster Bentley is selling a carbon ceramic upgrade kit from a Supersports.

 

That my main concern the transmission! I don't know if the SS has the same or a different transmission.
if it's the same, no problem. I have to find out.
The turbo might also be a problem.

I don't see the needs to upgrade the brakes, it's not the top speed that I'm interested to improve it's the torque.

 

How abot this ?? https://www.vividracing.com/catalog/...45eo43fgs517o1

 

I'm against ECU ''tuning box'' since they are just giving ''false'' infos to the ECU without modifying a lot of other parameters which are modified during a proper ECU re programming.

I checked the differences in between the CSS and the CGT, in fact, they are subtle but, in my opinion, substantial enough to make me think twice about ''flashing'' my ECU.

first, the different bumper design allows for a 10% increase in the airflow to the intercoolers thus allowing the turbo to ''breath'' easier.
second, the ''bonnet vents'' allows hot air to get away faster allowing the air filter to ''ingest'' cooler air. those two modifications only allow for a significant gain of HP....
third, the gearbox ratio are different, my guess is that this modification allows the gearbox to better absorb the torque increase.it also might only be for allowing quicker acceleration in 1/2/3 but I don't know.
last but not least, the car is lighter allowing for less ''stress'' to the transmission.

it seems quite obvious that a CGT with, more or less, the same power/torque than a CSS will, rather sooner than later, have a problem with the turbos running too hot and the transmission being too stressed....

I noticed that the 2016 continental speed has almost the same power/torque than the 2009 SS but then, it has a different gear box and I don't know about possible other modifications in the engine/turbos.

so, my conclusion is that flashing the ECU of an older car for reaching this level of HP/Torque is asking for trouble.

 

....Hello from San Francisco...I believe you made a wise decision not to modify, if for no other reason, as stated, French Law...What year is your car and your experience with reliability...any recent Bentley in good tune has plenty go giddy app an go...JimB