JDEngineering too good to be true?

[VancouverS4]

http://www.jdengineering.nl/audi-s4-...jdengineering/

My Dutch might be non-existant but looks like 520hp and 625nm (460ft-lbs)!!!

They using that special sauce over there?

[LINDW4LL]

The Europeans like to use engineered crank numbers. Obviously a chassis dyno reads the hp/tq at the wheels, so they just make up a loss factor to calculate crank/engine horsepower..

520hp with a 25% drivetrain factor would be 390whp.

[WeeKenny]

The loss is calculated by the dyno during coast down. Most dyno's will give both the wheel power and the engine power over here.

[WeeKenny]

Just looked at the link, it actually states the whp too @441

[LINDW4LL]

Right, but that's still not too accurate, for a variety of reasons.

It makes no sense to convert the actual raw whp numbers into something that is basically an estimated guess.

[WeeKenny]

It really depends on the operator and the dyno. But I agree it's not the best to mess with the raw figures which already have a huge margin for error. Just the way it's done here.

So my stage 2 car for example has a print out for 480 I'd assumed engine HP but it ties in with 480's I've seen US guys quote for stage 2 so is that whp??