Dear Subscriber:
Welcome To
 I want YOU to WIN !!
So... be sure to read the past issues 
at the bottom of the page !!
It's important to 
understand all the ideas !

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   V  i  e  w  e  r       F  e  e  d  b  a  c  k

Hey MotoMan ! 
Your newsletter is the absolute best ! I look forward to every issue.

Had a bit of a problem this month (Aug), I think I missed it.

Turns out those evil-doers at Hotmail re-configured their system and I think this may have caused the Power newsletter to be filtered out as, gasp !!!, junkmail. Have you heard from anyone else about this problem? Anyway, I've changed the settings so this can't happen again. If you could resend the August letter to me I would really appreciate it. 

Keep up the good work Pat !   

~ Rob

Hi Rob ! 

Thanks for the good words !! Actually, my e - mailbox has been filled with similar tales of Power News withdrawal !! 

... And...
I plead guilty !!

I've been busy with silly problems like moving to another house and doing motor work. Lame excuses, I agree....

Don't worry my friend, I'll make sure the next issue of Power News really kicks it back into gear !!

Thanx Rob !!!

~MotoMan

In The 2 Past Issues... 
We've seen that 2 of the factory superbikes have got some serious problems !! 
Both of these bikes have aerodynamic problems caused by the direction their exhaust is pointing. The Harley points it's exhaust up, and the Kawasaki is it pointing up and to the right... 

 

What's the best way to point the exhaust ??

Here's an interesting photo of the correct 5 degree pipe angle 

(Featuring Schmidtastic's famous passenger.... )

 

The Idea
The main idea is that if you project back about 20 ft. / 6 Meters  the exhaust should point to the exact center of the aerodynamic form.

In the last issue we learned that this affects the 
"Dynamic Aerodynamics" 
or how the aerodynamics are affected when the bike is moving with the engine running. 

This issue is all about:
"Dynamic Horsepower"

Which is:

"The Closely Related Problem"

I've been asking about ... !!

More "Invisible" Power Loss !!
                

Q: Where does the energy that's being used to enlarge & deform 
the Harley's aerodynamic form come from ??

A: The Engine !!

 

Just as the exhaust is disrupting the bike's aerodynamics, the aerodynamics problem is costing the engine real horsepower !!!

Since the engine is an air pump, it's using an amazing amount of energy to de-form the aerodynamic wake behind it. The piston has to push the exhaust out against the natural flow of air behind the moving bike. 

This is Another Example of Why Speed 
Isn't Directly Connected to Dyno Readings
The Harley & Kawasaki superbikes may make "X" amount of power on a dyno, yet their actual 
Dynamic Power is progressively reduced as they reach top speed on the racetrack. 
In the real world, Dynamic Power is all that matters...  (unless you're just "bench racing"...)     :)

  
Another Way of Thinking About It ...

Ram Air Induction helps an engine make more  horsepower as it increases it's speed, by forcing positive air pressure into the engine. 

At the back of the bike, when the exhaust is pointing the wrong direction, the engine will make less  power as it increases speed !! 
It's a type of "Reverse Ram Air"

Taking It One Step Further:

By purposely pointing the exhaust gasses exactly  into the center of the aerodynamic draft created by the bike, the exhaust will be sucked out, and the engine doesn't have to work as hard.
It's "free" power.


             

That's Right ....

Now even Britney Spears  
knows how to FIX
Eric Bostrom's Power Problem...

All she has to do is;
TWIST his PIPE clockwise

...about 10 degrees !!!

Ouch ...

Now That's Outta - Hand !!!

 

Breaking News: Harley's Quitting Superbike Racing in 2002 ???

Harley Engineers: Don't Give Up !! 
Just Take A Little Break, Keep Reading Power News, and Before Long, You'll Be Ready To Kick Some Real Azz !!
All the horsepower secrets you'll need to easily win are contained in the upcoming issues !!

Future Power News Topics:

How Does a Four Stroke Engine Really Work ?? 
(It’s Not Really The Way We Were Taught In School !)

Power Curves for Motorcycles 
(Why The Power Curve Matters More Than The Horsepower)

MotoMan's Toolbox 
(Good News: You Don’t Have To Go Broke… 
Check Out The Cool Tools I’ve Found)

Intake and Exhaust Porting 
(This One's Gonna Blow You Away !! ... 
And Lap Records Will Be Smashed)

Valves & Valve Jobs 
(Full Radius or 5 Angle ?? …or… Probably....  Neither )

Milling & Compression 
(All About Squeeeze … And How To Get More   :)    )

Degreeing Cams 
(Finally An Understandable Explanation Of This Confusing Process ... Plus MotoMan’s Top Secret Settings)

Oils 
(Break-in / Best Protection / Best Horsepower / Filters / Tips)

Transmissions 
(How They Work, Plus Some Tricks)

Loose Bolts & Other Mistakes 
(How They Happen… Plus My Secrets To Avoiding Them)

Cylinder Boring & Honing 
(A Look At The Process / And Amazing New Info)

Piston Rings and Installation 
(Some Tricks To Reduce Stress on Yourself And Your Rings)

Dyno Testing 
(This One Will Rock)

Jetting 
(Understand & Master This Elusive Skill, 
 And You’ll Never Need A Jet Kit Again !!)

Fuel Injection 
(EZ EFI Setup)

Connecting Rods, Bearings and Clearances 
(Answers To All The Plain Bearing Questions)

Piston to Valve & Head Clearances 
(The Secret Specs / And How To Measure Them)

Cryogenics 
(Hey MotoMan, … Is It just "Bunk"..
..Or Does It Really Work ??)

Camshaft Designs 
(MotoMan’s "Wildest" Power Secret)

Wrenching Without a Manual 
(How To Do It … And Survive )

Troubleshooting 
(Lateral Thinking At It’s Finest )

Snake Oils 
(Dura Lube / Slick 50 Etc)

Ignition Timing 
("Advance" Warning: This One’s A Must Read)

Fork Setup 
(Mystery No More)

Shocks 
(Your Perfect Set Up & Perfect Adjustment)

Ceramics 
(What About ‘Em ... ??)

Anti Friction Tricks 
(How to Reduce Drag & Uncork Some Serious Speed)

Crank Lightening & Flywheel Effect 
(Hold on to Your Crank Boyzzzz !! Why It’s Not A Good Idea)

Valve Clearances & Adjustments 
(Tricks & Tips Everyone Should Know)

Wheel Bearings 
(This One Rocks... )

Chains & Sprockets 
(The Hot Set-Up For Maximum Speed)

Gearing 
(Why Many Racers Get This Wrong)

Freshen up 
(What To Look For In A Worn Out Motor)

Chassis set up 
(Get The Right Attitude)

Fuels 
(What Works Great, & How To Get Massively Ripped Off)

Clutches 
(Now That You’ve Got All This Power
… Here's How To Keep It)

Air Filters 
(How Freer Breathing = Slower)

MotoMan

 Says:


Don't 


Forget


To


Crack
 

Open
 

an
 

Ice Cold 
 

Budweiser Welcomes You To Mototune USA !Get Yourself A Cold Bud & Enjoy The Show !

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