Tuning On An Inertia Dyno (not Braked)

[180bfj20det]

Hi,

I am located in France at the moment and unfortunately ALL dynos within a 500km radius of me are inertia dynos (not braked). I would like to have my car tuned (CA18DET 180sx) but can this be possible? This is the question I asked, and all 3 (yes only 3) shops with dynos say YES. They simply keep the engine on certain load points by using the car's brakes (as opposed to loading the dyno via eddy brakes etc which are found on braked dynos).

Frankly, they have me convinced!!!! Seeing the competition rally cars coming off these dynos and running so successfully and reliably, I have proof before my eyes that tuning all load points on an inertia dyno is accurate, viable and efficient (providing you have good rear brakes).

BUT....I have heard rumours that cars tuned on inertia dynos held on specific load points through the car's brakes run LEAN....I dont see how this could happen as really the concept is the same as road tuning except youre doing it in a safer manner.

I want to know people's opinions before I hand over 200 euros an hour for tuning on a dyno which may not give me the results i want....

Cheers

[DRFTR33]

i have never seen a vehicle tuned on an inertia dyno but i dont see that it will cause you any problems as long as the person tuning your car know what they are doing

have you considered road tuning because it can be done anywere and the tuning is done in a real driving enviroment so in the end you can get a better running vehicle as long as the tuner knows what their doing

[Morgs]

Road tune for sure... its not a bad thing!