[quote=""MJim""]@40D, so by the sound of things you told your insurer about the remap. Did they hike the premium by much? I'd also be very interested and sounds like the performance hike is dramatic!
@ jason, what are the downsides if any e.g. increased engine wear, and why don't the manufactures extract the additional performance themselves?[/quote]
We always ask the customer what they would like to see from there remap
If they don't know then we would suggest which type of remap they may like after asking them a few questions
As 535dboy said but also if they produced more power they would be in a different class bracket and would cost more to buy
They would also have problems selling the other models
Auto boxes can handle alot more torque the manuals
We did a lot of testing on all our BMW auto boxes in our own cars to test how much they could take
The max my auto box would take before it any where near to slipping was well over 600 ftlbs (800nm)
we normally run ours around 550ftlbs (745nm)
We kept 40D's torque limit under 700nm with a smooth power and torque output
As for wear we have a good few cars petrol and diesel which we have tuned from new or a few years old which have been passed down from our customers to customers which now have the mileage of flying to the moon and now are on there way back to earth
a good few of these are taxi's and one of our own staff cars
There are a good few cars we have made the remap for other tuners which have been dyno dynamics rolling road tested like PDtuning's 335d which is used every day and made over 750nm of torque
View there 335d on the dyno on YouTube
http://www.dyno-tuning.co.uk/