125cc Dragracing
Honda Nova

My new pipe gave me a Major Event win first time out at 11.14 seconds! Thanks for a great program!
               Chai - Thailand

250 2 Stroke Sprint Racer

...now I have TON”S more torque out the corner ...
                 Jimmy - USA

Customers in the Netherlands - We Now Accept online payment by iDEAL - Simply select it in the order process with Share*it

READY FOR IMMEDIATE DOWNLOAD: WE SELL 2 STROKE WIZARD TUNED PIPE AS A SOFTWARE DOWNLOAD THROUGH SECURE PAYPAL or SHARE-IT COMMERCE SYSTEM File Size: Full version: 3.3 MB Download Time: 56k: ~8 Min ·  DSL/Cable (1/8/16Mbit):  <1 Min.

Two Stroke Wizard, Tuned Pipe use advanced methods for solving exhaust gas-flow predictions, giving you top performing dimensions for your custom expansion chamber exhaust in minutes.

It only require this few INPUTS

Number of Cylinders

Cylinder Bore in mm

Engine Stroke in mm

Exhaust Port Open Period (Deg.)

Transfer Port Open Period (Deg.)

Target Power Developed in kW/hp
The power you aim for this engine to develop in kW or hp.

Target RPM @ Peak kW/hp (Power)
The RPM this engine will produce its Maximum Power at.

The Exhaust Port Exit Diameter in mm
Measure the exhaust port diameter in mm at the point where it exit the casting (the size at the exhaust gasket position)

Fuel Type
Simply choose the fuel you will use with the radio button
Methanol
Ethanol
Gasoline

Diffuser Type
Select the Expansion Chamber Type from the radio buttons.
Two Stage and Three stage refer to the amount of diffuser cones after the header pipe. If your BMEP is more than 9.5 we strongly suggest going the 3 stage route. (This Program automatically gives you the BMEP value)

Then you can choose a broad or narrow powerband with a track bar button... (Narrow = more power / Broad is a trade of but less “peaky” ) next Click "Calculate Exhaust" button and the dimension results are given in mm. Simply click on the print icon to print these results.

Screen shots - Click for Bigger Image

How a Tuned Pipe Work:
When the engine fires it detonates the fuel mixture in the combustion chamber, pushes the piston down, opens the exhaust port and allows the burnt gases to escape along with the sound wave produced when the engine fired. The negative sound waves pull the exhaust gasses out of the exhaust port, and sucking the fresh inlet mixture through the transfer ports, filling the combustion chamber and some fresh inlet mixture go out into the header of the exhaust .

The positive sound waves, reflected back from the convergent (baffle) cone, force the extra fresh fuel mixture (that is now inside the exhaust pipe, and would otherwise been lost) back into the combustion chamber through the exhaust port moments before it is finally closed, (and since after the transfer ports was closed) thus acting effectively as a supercharger turbocharger on your 2 stroke engine.

This happen at very close tolerances individual to each engine specifications and with the correct dimensions can boost Horsepower by up to 40% above standard tune depending at the present state of tune of your engine.
 

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