Velocity Stack
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The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Velocity Stack
Does anyone know a formula to determine the length of the velocity stack to make an engine constantly run at 5000 RPM
Do you mean you want the engine to make peak power at 5000rpm? The important thing is the length of the entire intake tract from the valve to the end of the of the velocity stacks. Anyways, here are a couple of links that may help you out.
http://www.bgsoflex.com/intakeln.html
Intake_Design_v1_8
http://www.bgsoflex.com/intakeln.html
Intake_Design_v1_8
thanks for the websites they really help, just ot let you know that this information is for fuel injecting a 10HP briggs and stratton, that is going to run throttleless, eventually the engine will run on hydrogen so thats why i need to know what size velocity stack i need.
Actually we are going to run the engine at a constant 5000RPM
Actually we are going to run the engine at a constant 5000RPM
Oh okay, that's different! Without a throttle, the speed the engine runs at will vary with the loading so you'll probably need to experiment with length and especially diameter to get the speed you need at the loading you want. And I think the optimal setting for you would likely change if you change fuels.