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 !
Hi Rob !
Thanks for the good words !! Actually, my e - mailbox has been filled with similar tales of Power News withdrawal !!
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 !!!
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
Here's an interesting photo of the correct 5 degree pipe angle
Schmidtastic's famous passenger.... )
In the last issue we learned that this affects the
This issue is all about:
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
All she has to do is;
...about 10 degrees !!!
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 Go For It !!
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
Power Curves for Motorcycles
Intake and Exhaust Porting
Valves & Valve Jobs
Milling & Compression
Loose Bolts & Other Mistakes
Cylinder Boring & Honing
Piston Rings and Installation
Connecting Rods, Bearings and
Piston to Valve & Head Clearances
Wrenching Without a Manual
Anti Friction Tricks
Crank Lightening & Flywheel Effect
Valve Clearances & Adjustments
Chains & Sprockets
Chassis set up
Learn How to Do it Yourself:
Smaller Intake Ports Gain 7 % More Power