[kirk212]

I was searching around before to prove to a buddy at work that an AWD car with 320whp (like myself) has roughly 400 crank horsepower. I know most of us know to just add 20% to your whp to get your crank hp but this is a nice little tool. I searched on here for something like it, but couldnt find anything. So I figured it would be good to have on this forum.

http://www.mk5cortinaestate.co.uk/calculator4.php

 

[Kooldino]

Short of putting your engine on an engine brake, you'll never be able to prove it.

That said, the calculator seems reasonable.

 

[dcpatters]

Assuming a stock Evo makes 291 crank HP, wouldn't it be easier to calculate the actual loss from the dyno session and then go from there?

Different dyno, load, etc. Although I did not read the link, I don't think you can assume 20% across the board.

 

[djmac]

Assuming a stock Evo makes 291 crank HP

That's another problem with horsepower numbers, you have to ASSUME that all vehicles come off the line with the same power, and THAT's not even true.

Realistically, the best measure of two vehicles (power, at least) is to time them 0-60 or 1/4 mile (or whatever other speed test you prefer) back to back at the same location, driven, ideally, by the same driver.

 

[[email protected] Racing]

Calc seem pretty good, but I wonder if they account for the center diff, that may rob more power and wasnt on earlier awd cars

 

[NotAnEvoOwner]

Mind you, when they dyno turboed cars, they heat soak the intercooler, so under the worse conditions your still getting xxxhp. Otherwise, dynoing the car at 32F, wouldnt be a legitimate test.

 

[rageagtm]

seems accurate to me. stock x it shows about 240 at wheels, so pretty accurate

 

[fishstix]

Calculator seems to work. Reads like a Mustang Dyno.

So I'm making 431 HP at the crank. Fuck you FQ400! haha

 

[ak47m203]

so mine is FQ400 MR.lol.

 

[kirk212]

Its def not the most accurate tool there is. Like Dino said, the only "true" way to measure crank hp is with an engine break. I just thought it was a pretty quick and nifty tool... having FWD, RWD, AWD, MT, AT all as options. Plus it is pretty accurate, considering....

 

[waltezee]

It's an enteresting link. The RWD seems to be fairly accurate from numbers I've seen but not sure about the accuracy of the AWD, FWD. The 20% thumb rule really is the biggest miss conception about converting HP from crank to wheel or vice versa. In order for it to be useable manufacturers would have to use the same materials, components, and design for there drive train. It's like saying the drive train loss for a GTR is the same as a MX5.

 

[chef_tony_t]

according to that im putting down 411hp. yay

 

[EvolutionofacarTimmy1979]

Currently have 588whp 412tq on E80.
526whp 378tq on 93 octane
I did the whp to hp calculator and it’s reading 735hp to 588whp I don’t know how accurate this is. It mite 650hp or more possibly.

 

[YCEvoX]

Just tell your buddy to learn about WHP, or know that you just can't talk to your buddy about car stuff with the knowledge gap.😅
The best way is what @Kooldino said.