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Message started by Serowbot on 07/24/14 at 18:43:12

Title: Top Speed HP calculator...
Post by Serowbot on 07/24/14 at 18:43:12

I just added this to the Tech Section... it's partly just for fun...
... but it does seem fairly accurate based on my bike and top speed, which I know makes about 34hp... and has 94mph top speed...
(or it did once anyway.. ;D)...

It takes about 40hp to get a bike up to 100mph... (if you can tuck in really good)...

From the Tech Section...

3523342931242932460 wrote:

Here's an interesting calculator to estimate hp needed for different speeds...
For a Savage,... I guesstimated,...
.80 drag,
7 sqft frontal area,
480lbs for me and my bike,
= 34hp to go 94mph.... that's my top speed...
http://www.wallaceracing.com/Calculate%20HP%20For%20Speed.php

( I'm 5-8" 145lbs)... my bike is 340 and has narrow drag bars...
Input your own combined bike/body weight,... also add some drag and frontal area if you are big or have a big winshield...input 1.0 for drag... and 8 or 9 sqft for frontal area ...
;)...

Give it try, and see what you think...
Feel free to post your results here...
;)...

Title: Re: Top Speed HP calculator...
Post by Paladin. on 07/25/14 at 01:59:39

786E79647C69647F0B0 wrote:

... 34hp... and has 94mph top speed...
For a Savage,... I guesstimated,...
.80 drag,
7 sqft frontal area,
480lbs for me and my bike ...

I used the same .80 drag, I'm smaller so put 6.5 sq ft, 445 lbs bike and rider, know I can hit 67 mph GPS per my Smartphone -- says I should have 11.7 bhp. Which is what Piaggio claims my scoot has.

Sounds good for me.

Title: Re: Top Speed HP calculator...
Post by gizzo on 07/25/14 at 03:08:54

That's really cool! I did a quick measure up of my Enfield and tried it. It claimed the hp to do 90mph ( it's top whack) need 28.8 hp. The spec from the factory its 29.9. It also tells me ill need 50hp to hit 110. That's not gonna happen ;)

Title: Re: Top Speed HP calculator...
Post by ToesNose on 07/25/14 at 03:28:04

WOW! I've got around 1.5 HP when I go running! ROFL!! ;D

Title: Re: Top Speed HP calculator...
Post by Serowbot on 07/25/14 at 10:31:09

According to the Wallace Racing HP guesstimator...

Dave's bike, with a top speed of 101mph,... is making about 41 hp...
..(using the same weight and drag numbers I used for myself)...(Dave's a little bigger than me, but his bike is bit lighter)...
That sounds like a ballpark accurate figure, considering his mods...

Possibly our top HP Savage on the site...

Title: Re: Top Speed HP calculator...
Post by Dave on 07/25/14 at 10:39:13

6472657860757863170 wrote:

I have never seen Lancer's....REX run - but MMRanch has ridden both our bikes and feels that Lancer's bike is faster. It should be a bit faster - as he has a hotter cam and a larger piston.