the horsepower on the srt6 to the wheels?

 

The numbers you will see vary do to several different reason. Types of Dynos, Temps, Fuel Quality, Octane etc. You usually see them put down between 275-295. Mine put down an average of 291 with the highest being 298 and the lowest being 284. Hope that helps...

 

NeverEnough,

Was that before or after the K&N's?

If after, did you get a 'stock' number for baseline purposes?

SQ

 

That was AFTER the K&N filters. However, I noticed no "seat of the pants" difference with them. I haven't actually dynoed the car yet. I came up with those numbers with some mathematical equations.

I took the known weight of the car with me in it and 8 gallons of fuel, the transmission and final drive gear ratios, the 1/4 Mile elapsed time, 1/4 Mile Trap Speed and extrapolated it from there. That method is actually more real world accurate, as math doesn't vary... Dynos vary alot from one place to another. I've actually seen dyno operators "modify" the dyno so that the customer thinks the car is making more power that it really is. The other problem with dynoing our cars is the 5,000 RPM fuel cut when running just the rear wheels. The car actually makes peak power at its redline of 6,000 RPM.

 

There's actually a mathematic formula used to formulate rear wheel HP figures that takes into account parasitic driveline losses. Unfortunately I don't know it...I should search for it though.

The problem with using dragstrip numbers is that they don't account for wind resistance, air density, temperature, humidity, etc.

 

Actually I posted the simplified explanation. The program I used DOES account for Altitude, Humidity, Temperature, Drag Coefficient, etc. I guessed at the drivetrain loss. The 284 WHP was calculated with 20% Drivetrain Loss. The 298 WHP was calculated with 17% Drivetrain loss. If the actual drivetrain loss is MORE than 20%, then the Mercedes Engineers need to be shot...

 

Oh...sorry then...my bad!

 

I'm not saying these calculations are 100% Accurate, but I'd be willing to bet it has OVER 280 At the wheels.