[how much hp?] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

Pages:1

how much hp?
(Click here to view the original thread with full colors/images)

Posted by: Dr89

i was just wondering if anyone could give me a good estimate of how much horsepower im pulling out of my kfx??? engine is stock, has a full white bros carbon fiber exhaust, k&n filter with outerwear, no lid or snorkel, noss machine aluminum flange, white bros CDI, dyno jet kit...and i think thats it as far as those kinda things.

i was thinkin a stock kfx was around 33hp right? so i figured i'd have at least 40...maybe? i dunno really im just guessing

and how does that compare to the hp of mainly stock 450's???

just wondering because im deciding whether or not to keep my kfx or trade it for a closer to stock 450 or some kind of hybrid, but i figured my kfx could well out handle a stock 450 and if the hp is somewhere close i may as well just keep it.

thanks, and sorry for the long post.

Posted by: z400roosteR

Well i literally just got back from having my LTZ dyno'd and the results are wierd, pulled 29.8hp AT THE WHEELS and 24lbs torque. They said those numbers are just above average of what they read for piped 400's. They say a piped 450 hits 35-37 on their dnyo.

And if i measured my bike by the crank it'd be around high 40's maybe 50.

And those numbers are w/ hmf slip on, kn, air box lid removed......Jetting was dead on also.

Just sounds like their dyno reads lower, reason i did it was i am installing a big bore and cams..Wanna see the number jump. Cause it really doesn't matter what it reads because the gap will be the same. whether it goes from 29 to 37 or if it read 35 and jumped to 43 it is still the same amount.

Posted by: drzoo2

Most of what I've seen a stock z is 27-29HP. Most of the pipe shootouts show about +5HP so it's right around 34 or 35 with your mods. I think most bigbore bike kits are only pushing a little more than 40.

Posted by: Dr89

alright cool, thanks guys

Posted by: montycarlo

The rule of reality is that you've always got more power with your own math than you actually do. I'm staying away from dynos unless I've got a wrinkle in my tuning that I need per-fessionaly ironed out!

Posted by: rockman

quote:
Originally posted by drzoo2
Most of what I've seen a stock z is 27-29HP. Most of the pipe shootouts show about +5HP so it's right around 34 or 35 with your mods. I think most bigbore bike kits are only pushing a little more than 40.

I want to have mine dyno'd once i get it ported and an fcr