Its not that hard to figure out guys, jeez. Drivetrain loss is pretty simple. With and EVO being AWD you are loosing between 21-24% of your horsepower before it reaches the wheels. Some people think that they are only loosing 20 horsepower through their drivetrain, thats just flat out retarded. Take my car for instance, EVO IX MR with a turbo back exhaust, 21psi and 93oct. It put 265.9 awhp down on the dyno. The EVO is greatly underrated from the factory, And I know Im losing alot more than twenty horsepower,
OK so ADD 23% and you get 347, and that is as close to MY flywheel horsepower I can get. So I figure I am losing 79hp through my drivetrain and all the rotational mass involved.
Everyones EVO dynoes in at different numbers, Every engine is unique, all drivelines are unique also. THERE IS NO WAY TO GET A PERFECT READING FROM THE FLYWHEEL UNLESS YOU REMOVE THE MOTOR. USING THIS PERCENTAGE WILL GET YOU WITHIN 10-15hp OF WHAT YOUR MOTOR ACTUALLY PUTS OUT. to some 10-15 HP is alot, not to me.
NOW DONT GET ME WRONG, WEIGHT OF WHEELS, TEMP OUTSIDE, ATMOSPHERE PRESS, WEAR ALREADY ON MOTOR AND DRIVETRAIN, AND A BILLION OTHER FACTORS INVOLVED. PUT IT THIS WAY, DO IT LIKE THE ENGINEERS DO IT, EVERYTHING STARTS WITH AN ESTIMATED GUESS.

 

"IM FREAK'N OUT MANNN!!!!"

 

someday hopefully some one with the resources will dyno just the engine then chassis dyno the whole car, till then it wil be nothing more than and educated guess at best and wild speculation at worst

 

Andenbre, even if someone did that, we wouldn't be able to apply it to all power levels, since there would be no evidence that the static drivetrain loss on that car would apply to other cars or be linear as power increases.

 

Yes, I agree with Warrtalon, in order to initiate the loss of power, you have to calculate the proper inacusitions to get to the flux capacitor, in reference to the substantial amount you have to multiply then add divide by two and then take away 32, then you count how many socks are in your dresser and divide and multiply by 2, giving you your exact horsepower.

 

I'd say that's more of a wild stab in the dark than an estimate. I'm not even talking about the difference between cars or whatever, but the thing is I don't think anyone outside Mitsu knows it for sure and even if they do, it's not as simple as a percentage. And 10-15hp is IMO optimistic. The tranny operates from 0 up to 170+ mph and at varying power the difference in loss at these speeds is more than 10hp.

As I said, it is speed dependent. It would probably be easier to remove the engine and dyno that. Then re-insatall the engine and dyno the car at the wheels then you might get a rough indication of what magnitude it is.

Anyway, I don't think flywheel hp should be of concern to us folks. It's what it's putting down at the wheel that's important. And dynos that you put your whole car on measures the wheel hp anyway.

BTW, heavier wheels and flywheels do not have anything to do with tranny loss. Much in the same way that having a heavier car doesn't mean you make less power.

p.s. anyone tried different tyre pressures on a rolling road dyno? i read somewhere that losses at the tyre/roller interface is quite significant. But that's if you're interested in 10-15hp.

 

Well if you think about it is it that lame?
Considering from factory the power is meant to be 280bhp to the crank on 100 ocatne jap fuel. So I have 300bhp to the crank with a test pipe, cat back and intake on 95 octane irish fuel.

 

yes, you are freaking out... Man~ man~ man~

lol

 

That is true. Sorry I forgot they're on 100RON overthere.... In any case, the numbers from the States seem higher. It's be interesting to see how it goes with the cams and a tune. Should roclk...