It is impossible to make more horsepower without increasing the mechanical and thermal stresses on the engine, clutch and gearbox. It's hardware that 'makes' the horsepower, not electronics. The claims of tuning companies are dubious. Have a look at 'CNL re-mapping' via google, would have no hesitation in recommending them.ĭiesel tuning chips - do they work as promised? - unthrottled very cold, very hot, poor fuel supplies etc.then there's the potential for warranty claims, so they'll de-tune to be re-map (not a chip) is pertiment to that particular vehicle only, whereas a manufacturer, through economy of scale, builds a load in one hit. Also they have to take in to consideration different markets e.g. The way it was explained to me was that the manufacturers juggle the govt fuel figures, which are lab based and unrealistic for road use. Fuel economy improved by about 3 -3.5 mpg. It's made a noticeable difference.Ģ litre Ford diesel engine in Jag X Type, 130 bhp standard and roughly 330Nm torque. I have had my wife's car re-mapped and can confirm it has improved the mpg as well as the torque and brake horse power. Worth checking out other people's views of the chip you're considering on owner forums and see what their experiences of mpg and reliability are.ĭiesel tuning chips - do they work as promised? - Westpig Only one of them turned out to genuinely improve economy whereas the others it dropped but that was probably down to using the extra power. The more developed remaps adjust and recalibrate a much wider range of ECU values and can have a more positive effect on the economy as well as more power and smoother power delivery.įour of my last five cars, 3 of them diesels have been remapped and all have been successful in that the cars power has increased and I had no problems with anything failing.
They often don't update the car's logging data so the computer info on mpg doesn't see the extra fuel being burned so the only real test is to measure at the pumps brim to brim.
They'll claim better mpg because you can access more power/torque and don't need to rev the car so much and can hold a higher gear longer.
They'll often over fuel the car and the result is lots of smoke - common problem with bolt on power modules or smoke boxes as they are sometimes called. Some chips or remaps just allow for more fuelling and adjust the fuel/air mixture thresholds to increase the power. Diesel tuning chips - do they work as promised? - oldtoffee