Guess MY HP?

This is a discussion on Guess MY HP? within the Engine/EFI/Drivetrain forums, part of the KFX450 Performance category; Quote: Originally Posted by 450speed Well im going to the dyno on Tuesday, and just wondering what you guys think my numbers should look like? ...


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Old 03-28-2009, 12:02 PM
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Quote: Originally Posted by 450speed View Post
Well im going to the dyno on Tuesday, and just wondering what you guys think my numbers should look like? I have 13in dasa, cfm custom intake, pc111, stage 2 hot cams, port and polish head, 12.8 piston. The bike just strigh up rips. I put a brand new set of razors on it and it still just wants to blow them off.
I just finished my build that is very similar to yours. 13inch dasa, fuel atv intake,pc3,bcs performance ported head, 13/1 cp piston,and web 963/216 grind cams. I live on long island and the only atv dyno is at the local ktm dealer. I made 46.5 horsepower and 29 torque.This dyno is an eddy current dyno that reads 15% lower than a dyno jet.I never dynoed when the quad was stock but with just the big 3 it made 39 horse and 27 torque. add15% and thats 45 horse which is about right for big 3.so i figure if I add 15% to my 46 horse im making now im at about 53 horse on an average dyno jet dyno. I'll say this the bike straight up hauls ass now.I'm really happy with it.
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  #12 (permalink)  
Old 03-28-2009, 01:54 PM
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ya i would say mine sure feels like 50+ hp with the good old butt dyno.
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Old 03-28-2009, 09:11 PM
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Quote: Originally Posted by 86gt View Post
Quote: Originally Posted by 450speed View Post
Well im going to the dyno on Tuesday, and just wondering what you guys think my numbers should look like? I have 13in dasa, cfm custom intake, pc111, stage 2 hot cams, port and polish head, 12.8 piston. The bike just strigh up rips. I put a brand new set of razors on it and it still just wants to blow them off.
I just finished my build that is very similar to yours. 13inch dasa, fuel atv intake,pc3,bcs performance ported head, 13/1 cp piston,and web 963/216 grind cams. I live on long island and the only atv dyno is at the local ktm dealer. I made 46.5 horsepower and 29 torque.This dyno is an eddy current dyno that reads 15% lower than a dyno jet.I never dynoed when the quad was stock but with just the big 3 it made 39 horse and 27 torque. add15% and thats 45 horse which is about right for big 3.so i figure if I add 15% to my 46 horse im making now im at about 53 horse on an average dyno jet dyno. I'll say this the bike straight up hauls ass now.I'm really happy with it.

you have pretty much a full race motor and it only made 53?even if it made 55 thats badddddd for all of the mods you have listed is it tuned right?
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Old 03-28-2009, 09:36 PM
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Quote: Originally Posted by TigerRacingProducts View Post
Quote: Originally Posted by 86gt View Post
Quote: Originally Posted by 450speed View Post
Well im going to the dyno on Tuesday, and just wondering what you guys think my numbers should look like? I have 13in dasa, cfm custom intake, pc111, stage 2 hot cams, port and polish head, 12.8 piston. The bike just strigh up rips. I put a brand new set of razors on it and it still just wants to blow them off.
I just finished my build that is very similar to yours. 13inch dasa, fuel atv intake,pc3,bcs performance ported head, 13/1 cp piston,and web 963/216 grind cams. I live on long island and the only atv dyno is at the local ktm dealer. I made 46.5 horsepower and 29 torque.This dyno is an eddy current dyno that reads 15% lower than a dyno jet.I never dynoed when the quad was stock but with just the big 3 it made 39 horse and 27 torque. add15% and thats 45 horse which is about right for big 3.so i figure if I add 15% to my 46 horse im making now im at about 53 horse on an average dyno jet dyno. I'll say this the bike straight up hauls ass now.I'm really happy with it.

you have pretty much a full race motor and it only made 53?even if it made 55 thats badddddd for all of the mods you have listed is it tuned right?
All dyno's read different.
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Old 03-29-2009, 12:27 AM
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Quote: Originally Posted by TigerRacingProducts View Post
Quote: Originally Posted by 86gt View Post
Quote: Originally Posted by 450speed View Post
Well im going to the dyno on Tuesday, and just wondering what you guys think my numbers should look like? I have 13in dasa, cfm custom intake, pc111, stage 2 hot cams, port and polish head, 12.8 piston. The bike just strigh up rips. I put a brand new set of razors on it and it still just wants to blow them off.
I just finished my build that is very similar to yours. 13inch dasa, fuel atv intake,pc3,bcs performance ported head, 13/1 cp piston,and web 963/216 grind cams. I live on long island and the only atv dyno is at the local ktm dealer. I made 46.5 horsepower and 29 torque.This dyno is an eddy current dyno that reads 15% lower than a dyno jet.I never dynoed when the quad was stock but with just the big 3 it made 39 horse and 27 torque. add15% and thats 45 horse which is about right for big 3.so i figure if I add 15% to my 46 horse im making now im at about 53 horse on an average dyno jet dyno. I'll say this the bike straight up hauls ass now.I'm really happy with it.

you have pretty much a full race motor and it only made 53?even if it made 55 thats badddddd for all of the mods you have listed is it tuned right?
I wouldnt say its even close to a full race motor .if it was a full race motor it would have alot more compression, and have alot more aggresive cams. plus probably a big bore and stroke. The tuner at the ktm dealer who tuned it does everthing from street bikes to quads.He knows what he's doing.
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Old 03-29-2009, 01:25 AM
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48 hp making peak power @ 8500 rpm then droping off
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Old 03-29-2009, 01:55 AM
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Quote: Originally Posted by dl11sec70dodge View Post
48 hp making peak power @ 8500 rpm then droping off
Only 48?I remember one of your post were you say a kfx with the big 3 does 45 on your dyno.Ported head, cams, and .8 increase in compression over stock only giving 3 more horse?Is his intake that bad?
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Old 03-29-2009, 07:14 AM
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just sayin... these bike dont make power easily... u need the perfect combo to make the power with a good curve... hitting 50 hp is tough
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Old 04-03-2009, 03:08 PM
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well walshyfz was the close. It made 51.3 with the factory tires. The graph blew out the window on the way home, so going to try to get a reprint next week.
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