Ride-sleep-repeat wrote:Cyril Haearn wrote:What is remapping exactly? Does it conform to the word and the spirit of the law?
It is perfectly legal.You're basically telling the computer to change specific dynamics within the cars running system.
Most cars are 'de-tuned' to fall into certain categories.For example my car is 170bhp detuned from 230bhp.My insurance is happy for me to remap to 230bhp as it is safe to do so without having to modify parts of the engine.Obviously I need to inform them(and I do/will).Tyres/brakes etc are all OK as they are rated higher.My tyres for instance are 'Y' rated(186mph) the car is rated at 138mph.
There are generally two types of remap.One is out-and-out power/torque for acceleration/top speed the other is for extra power/economy.I go for the later.It cures the flat spots and turbo lag so as well as acceleration a bit quicker it's more economical.My last car averaged around 5-8mpg more after a remap despite 'gaining 30bhp.A big saving when you do 12000+ miles a year!
There are of course grey areas when it comes to remapping.Removing a DPF for instance.Although not strictly legal(or illegal) it is extremely difficult to detect as the ECU still thinks it's there and the shell is still visibly there but as it's gone it doesn't throw up a fault so never has to regenerate(or self clean).You are fooling the ECU in reality.
Then there's the extreme remaps/mods where people take engines to 3/4/500+bhp.This would massive increase insurance premiums so I would hazard a guess that not everyone who does it declares it!
I know a guy with an Audi RS4 Avant.It's a V6 440bhp as standard.He's had it tinkered with and remapped to 550bhp.He's eventually going to 600+.His insurance is already around £3k a year so he's not declaring anything and freely admits it!
Remapping will always happen.The more sophisticated engines and software get the easier it is for a computer nerd to get around.There will always be a way to get around the software just as there was always a way to 'soup-up' engines in the good old days.
Sorry to be boring but how do you get around the 'visible smoke instant fail' part of the mot that applies to Euro 4 and newer engines if the dpf has been gutted?