Originally Posted by
JayBee75
Agreed
After having years of tuning experience in performance cars, I assume the car was individually tuned on the dyno, rather than a generic map being applied for the d4?
A lot of companies use generic maps however in mass produced cars these days the tolerances and power outputs vary considerably, not only from manufacture but how they are run in and their lives to date to the point of tune. I have seen differences of up to 40rwkw in factory cars.
If it has been tuned to the car, most engines these days will cope with a reasonable increase, however you WILL reduce the lifespan of the driveline. The weakest link you will find will be the transmission which will either need strengthening via a valve kit etc at a specialist transmission place, or regular servicing, however this does not guarantee anything. Just remember the increased power needs to go through the driveline components and being 4wd will be soaked up via the transmission or diff, whatever the weaker point.
I know there are differing opinions, and this is mine, purely based on years of experience in this area, many types of tunes even back from piggyback days, to the development of edit tunes on factory ecu's.
Enjoy the car as these tunes also,can iron out small imperfections in the factory tune give smoother power delivery, better fuel economy, tuned to personal needs and obviously more power.
Cheers