Guys,

anybody knowing anything about the performance of the NE52 on the dynamometer (on engine and on wheels) with the SMG?

I am very curious about the actual performance of my car's engine (530i SMG) and I have not yet seen that piece of info anywhere! my curiosity, please!

 

Let's take ~ %15 off of 255hp which is equivalent to ~216hp.

 

Is that an aproximation aplicable to most of the engines? (including mine)?

 

That number is a rough estimate which depends on how heavy the dyno tester is (130lbs or 250lbs which makes a big difference), 4WD or 2WD, drive line effiency, etc.

 

Ok so what's my procent? What m i to expect? I'd like to dyno my car soon and then do it again after the remap.

 

from all the dyno results i've seen, 12-20% drivetrain loss is fairly typical for all cars

 

Except for the cars that actually are understated - some can make as much or more than stated values. However, in general some reduction in hp is to be expected.


To the original poster, why are you interested in this figure? IMO, dyno testing is only useful when making improvements to one single car. Just doing it to "know" is a waste of money.

 

I am interested in this figure, because I have noticed significant variations from the official output. For example, in Greece, the top car magazine, 4 Wheels, which regularly take every car they test to the dynamometer, report that the 523's (manual gearbox) output is 166 bhp on the wheels (therefore higher than the official 177 bhp), whereas the 525's (steptronic gearbox) is 177 bhp on the wheels again (clearly lower than the official 218 bhp).
Since my 530 bears an SMG, I want to know whether anybody has actually read something specific.

 

And if you do some tweaks to the car how would you know the actual gain to the ground if you don't know the original stock value? In this case dyno-ing the car is also pointless.

 

To know the gain, doing dyno twice is a must. In addition, the person who perform dyno must be the same one who does it for a second time. Like I mentioned before that different weight load will change rear wheel hp, too.