Does anyone know if the horsepower listed for a car is rearwheel or flywheel?

 

Anyhow, it is at the flywheel.

 

I know , but I wanted to be sure by the way, how much % is lost to the rear wheel?


[Modified by jdm92accord, 7:16 AM 6/18/2002]

 

none.

 

If you were wondering what typical drivetrain losses are, then expect a 12-15% loss in a FWD car.


[Modified by accordvtec, 3:34 AM 6/18/2002]

 

I believe it's listed at the tail pipe. Lbs/sq. inch.

 

SAE Net HP is wht the engine puts out at the crank with full accessory load. This is the result of manufacturers (like Ford GM and Chrysler) rating their engine output with no accessory load (technically lying) and stating that as the HP output when it is installed in the car.

Recently some manufacturs will slightly increase the HP output of a engine with an auto to compensate for the extra load on the engine (ie 210 hp vs 200) but they typically do not tell anyone and still rate the engine at 200 hp

 

as a rule i use 20% 12-15 is too generous a loss percentage

 

You do know your car is FRONT WHEEL DRIVE right?

 

ahhh damnit looks like the dealer lied to me

 

IMO, 20% is too large of a drivetrain loss. Cars typically have a 15-20% drivetrain loss from the factory. Hondas are pretty efficient, and run around 17% for the most part (there was an article on vtec.net back in 97 or 98 that I read about this).

 

Flywheel. Accords don't have rearwheel drive...

 

Agreed. I've been using 17% for the longest time as well, though this doesn't mean anything, evidently I'm mistaken about the 4k VTEC crossover too.

 

I never knew that. So without accessories on, our car makes a couple extra hp than listed?

 

yeah..... something like that......

 

They call that "gross HP". Intelligent muscle car fans will admit that their factory-rated 200hp 289ci engine probably puts out much less to the flywheel with all the accessories and exhaust attached to it.

Gross HP = Grossly Exaggerated

 

dude i know how you feel

 

lol, those damn dealers, they will get u. Watch out for them.

 

Not yet at least...

 

Yeah 20% drivetrain loss is way too high. 15-18 for most Honda's. I have 18% which i thought was high. I think this has something to do with different driveshaft setups no? I thought i heard something to that effect. Anyhow, correct me if am wrong.

 

The more moving parts, the more loss. The more your engine moves, the more loss.