How does a 2 stroke expansion chamber work?
The basic idea behind an expansion chamber is to use the momentum and pressure of the exhaust gases to create a pump that squeezes more air and fuel into the cylinder during the intake stroke. It does the same sort of thing that a turbocharger does, but it does it without moving parts.
How do tuned pipes work?
A tuned pipe has a set of cones- Divergent (meaning the cone gets bigger) and Convergent (meaning the cone gets smaller) that are built to cause “echoes” or pressure waves to reflect back, which if done properly can increase the power of the engine.
What does the expansion pipe on a 2 stroke do?
On a two-stroke engine, an expansion chamber or tuned pipe is a tuned exhaust system used to enhance its power output by improving its volumetric efficiency.
How hot does a 2 stroke expansion chamber get?
The temperatures vary widely depending on which part of the chamber you’re talking. At the outlet of the head and into the first bend you’re probably talking abound 700-800 degrees F tops. In the fat part of the chamber temps drop significantly, maybe as low as 450 degrees F.
How do you clean a 2 stroke expansion chamber?
Carbon+oil deposits inside a two stroke pipe are really really hard to get out. You need to attack it with an aggressive solvent while scrubbing. Some people have used carbon cutter, or any other type of gun bore cleaner and small fish tank rocks inside and swished it around.
What is resonance chamber technology?
Resonant Chamber is an interior envelope system that deploys the principles of rigid origami to transform the acoustic environment through dynamic spatial, material, and electro-acoustic technologies.
Can you run a 2 stroke silencer on a 4 stroke?
The expansion chamber from a 2-stroke would not work well on a 4-stroke. If you go with two silencers, be sure the pipes are long enough between the exhaust and the silencer.
Why do two-stroke engines need an expansion chamber?
As the forces in a two-stroke pipe design have become more well-understood, designers have been able to create engines that take more advantage of them and in fact require an expansion chamber to run at all.
How to calculate return wave timing for two stroke expansion chamber design?
Expansion Chamber Calculations by an Excel workbook file Two Stroke Expansion Chamber Design Professor Blair’s tests proved that the return waves timing can be calculated fairly closely using the straight distances and the pressure wave speed in the pipe for that distance.
What are the dimensions of an expansion chamber?
In addition to head pipe length, divergent and convergent cone lengths, an expansion chamber has three more crucial dimensions. The length of the straight ‘belly’ between the divergent and the convergent cones, the length of the tailpiece ‘stinger’, or muffler, and the diameter of the belly section.
What is the best 2 stroke expansion chamber software?
-2 Stroke expansion Chamber Software- I used 2 Stroke Wizard by Build and Click. Cost $20.00, came with a 4T header design program and a cone printing program that breaks large cones up to fit on 8.5×11 pages you can cut out and tape together.