This may be more than you want to know:
Never had any motor directly on a dyno-but that is not real anyway since
pipes typically never tune the same on the track like they do on the dyno.
Especially true in Solo.
To the ground, I am lucky to ever see past 40-45 HP net and that is seldom
on every single straight on any course. Taking CVT, final drive, and tire
losses into account, 45 is probably 65 HP at the motor.
Average HP to the ground is more like 32-40 HP depending upon air density
and length of straightaway. This is using a data recorder with speed vs
time + the vehicle+driver mass to graph HP continuously.
I kinda doubt that my engine HP ever exceeds about 70, even at Atwater,CA at
230 feet above sea level.
Brad Huelings claimed all Kaws made about the same peak HP in his dyno with
his best pipes at the end of his development at about 73 HP (corrected to
sea level).
The most outrageous figure claimed for any Kaw by anyone EVER was 80 HP.
So, I think one can definitely bracket the motors between the extremes of
60-80 HP.
BTW, I have seen with my own eyes fully ported Kaw motors being used by road
racers over the years.
I don't know if they ever reakky benefited or not; I have found it a very
difficult motor to clutch even with stock porting.
That is also the general consencus of snowmobile racers who used to
seriously run the Kaws.
A twin pipe, piston ported, low displacement motor is a bear to keep on the
pipe and simultaneosly achieve reasonable CVT efficiency in on-off racing.
That said, I still love the motors-very cheap to maintain, they sound nice
with twin pipes+mufflers, and they don't make enough power to hurt the rest
of the drivetrain.
Chuck
From: "Jan Schmidt" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: [F500] Doing the math?
Date: Sun, 03 Sep 2006 19:39:04 -0500
Okay, I will bite, "Chuck what are you getting out of your Kawi?"
Bill Schmidt 88 Red Devil Kawi
>>> John Whitling <[EMAIL PROTECTED]> 09/03/06 9:32 AM >>>
75 hp for a Kaw?????? Ask Chuck what he's getting out of his Kaw. It
ain't 75 hp. In addition we all race with the same tire patch so lighter
cars definately have a corning advantage.
Jan Schmidt wrote:
>This info is mainly for autocrossers, so bear with me.
>Here are some figures I have been playing with, since I am an
>autocrosser with a Kawi car.
>
>750 lbs/ 75hp (Kawi)= 10 lbs/hp
>1000 lbs/115hp (solo vee)= 8.7 lbs/hp
>800 lbs/95 hp (rotax) = 8.4 lbs/hp
>1000 lbs/ 123 hp (local guys solo vee)=8.1 lbs/hp
>
>So now, for a rotax car to have my lb/hp ratio, it would have to weigh
>950lbs?
>Scca allows the Kawi powered cars to weigh 50lbs less than a Rotax car.
>To have parity, My car with driver would need to weigh 637 lbs. Since I
>weigh 200, that would be a 437 lb red devil.
>Am I missing something here folks? If this is all true and accurate,
>then I feel good about getting my ass kicked constantly by Rotaxes and
>solo vees.
>Bill Schmidt 88 Red Devil Kawi
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