Hi,
I read somewhere that the AT losses 20 % hp on the TSX (normal cars lose about 24%). If it is, then how much hp is loss through an MT?

Basically I was just wondering how much is loss over a MT vs AT? I hope that 20 percent isn't a 20 percent loss from MT!

 

Check out this dyno: http://www.acura-tsx.com/forums/show...5&pagenumber=1

According to the dyno, the 6MT is losing just under 15%. I havent seen a 5AT dyno yet, but if what you are saying is true then there will be 5% more loss with AT.

 

It wouldn't surprise me if it was 20% from MT. The AT is about 1 sec slower in the 0-60 run (although part of that is 100 lbs more mass). Read about torque converters on howstuffworks.com and 20% loss seems plausible.

 

Shouldn't this be in a different forum? Car talk maybe.

 

We have seen a Auto dyno. It was from when Injen released their CAI for the TSX. The dyno's they released were from an Automatic. The Auto TSX was putting down 160HP compared to the 170 normally put down on a 6MT. I remember this specifically because the Injen CAI Auto TSX equalled or exceded a stock 6MT HP figures.

Too lazy to search, maybe tommorrow morning.

And yes this should be moved and has been.

 

so the 200 hp is a fabrication? that 160 hp sounds weak.

 

160 is very strong for an automatic rated at 200 hp actually

 

Engines are rated by how much power they put out . Ours is 200HP at the crank of the engine. Cars experience HP loss because of all the moving parts like transmission, etc. When the power is applied to the wheels it is less than what it is at the engine, typically 15-18% less on a MT.

You cannot measure the real output of your engine unless you actually remove it from your car. Instead dynos measure the power at the wheels, so my dyno was 175whp (wheel horsepower), which is equivalent to about 207 at the crank.

AT loses more HP than the MT because of the parts required for the transmission. To make about 160 whp the AT is losing about 23% from the crank. About 5% more than a MT.