Welcome GM Engineers !
I've learned a lot about winning motorcycle races by studying the best
ideas in GM and Ford engineering, so I'm proud that you're
interested in putting Mototune power concepts back into creating better
GM cars !
.This is How New Ideas Get
What's Wrong With Eric's Superbike ??
It's another common power problem that won't show up on a dyno.
The 3 factors to achieving speed that are usually considered:
Ram Air Effect
But, if you want to solve this power problem you need to think about what
the bike is actually moving.
After all, motion
is what motorcycles are all about, right ?
Static dyno & wind
tunnel testing only gives us
a small picture
of what's actually happening on the racetrack !!
At first, the
not easy to see...
But, once you learn what to look
it everywhere !!
My 3 Factors To Achieving Outrageous
Speed Are What I Call:
1) Dynamic Acceleration,
2) Dynamic Aerodynamics
3) Dynamic Horsepower
In other words:
You must always
think about the bike.... in motion
Maybe you can spot the problem easier when
you can compare 2 bikes...
The Spare Bike
This One's Not Perfect...
The Race Bike
This One's Definitely Bad !
Wild Billy Was Here ... ?
Split Image Photography !!
hard on the brain & eyes !!
... but, now you can easily see
The bike on the left's exhaust is pointing exactly straight back,
while the bike on the right's exhaust is turned about 10 degrees out to the right !
Although the one on the left is
better, it's still not in the best
So... What's The Problem ???
As you'll remember from the
"Harley Will Win"
article, I showed that one of their problems was that the pipes point the
exhaust gasses upwards which ruins the aerodynamics of the bike.
This is an example of
The Harley's aerodynamic "shape" becomes
completely different once the engine is running and the bike is on the
Be Sure To Read The
Will Win" Article
Bottom Of This Page !
It'll Help You To Understand The Kawasaki
Problem Better !
There is no diagnostic tool that could have revealed these problems !
That's Why You
Have To Use Your Imagination, And...
The exhaust should always flow with
the teardrop aerodynamic form.
Dynamic (actual) Aerodynamics are
The Harley's exhaust
gasses are pointing way up.
exhaust gasses are pointing way off to the side.
It's interesting to note that these 2 bikes are often criticized in the
motorcycle media as uncompetitive and having "outdated designs.
Both need to pay more attention to
Dynamic Aerodynamics !
The Hot Set-Up:
This isn't the best
photo, but you can see the idea !
shows how Your
exhaust pipe should look !
As you turn your head to match
Stunning Lean Angle, you can see that he's mounted his exhaust silencer inwards
(clockwise) about 5 degrees from straight up and down.
optimum position, because it points the exhaust towards the center of the
teardrop aerodynamic form.
Whether You Race Or Not:
Improving Your Dynamic Aerodynamics
give you better gas mileage & power on the road and on the racetrack.
Now You've Got The Power !!
There's another closely related problem that
& The Harley
Now that you can see 2 examples of the problem, it might be
easier to figure out.
You've really got to "think out of the box" to get it !!
Hold on tight, I'll reveal it in the next issue of Power News !!
Have a Cool Day !!
" Get Cold ! "
Sport of Motorcycling!!
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