Home
Basic Dirt Bike How-To's - Video
Dirt Bike How-To's - Video
Living The Moto Life - Video
Bike Tests | Shoot-Outs - Video
Forums
What's new
Latest activity
Log-In
Join
What's new
Menu
Log-In
Join
Navigation
Install the app
Install
More options
Close Menu
Forums
MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Motorcycle Myth # 5 - You need big ports to make big horsepower
Reply to thread
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
[QUOTE="Rich Rohrich, post: 1457557, member: 16241"] Localized sonic flow can happen in places where the port changes direction or sizing. Some call this "sonic choke" because it can cause a small shock wave that can essentially stop flow. Like most things with airflow I don't know that it is intuitively obvious when you are reaching that point in a port. It's difficult to model all portions of the port accurately even with really serious software like Riccardo WAVE CFD software. [URL]http://www.ricardo.com/en-GB/What-we-do/Software/Products/WAVE/[/URL] For those of us with more modest shop capabilities we have the trusty flow bench and pitot tube to measure pressure in various areas of the port to determine the relative velocity of the airflow. It's far from perfect but it has served us well for a fairly long time. [/QUOTE]
Verification
Which ocean is California closest to?
Post reply
Forums
MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Motorcycle Myth # 5 - You need big ports to make big horsepower
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top
Bottom