2 Stroke exhaust calculator

2 Stroke exhaust calculator


A simple 3 stage two stroke exhaust calculator based on formulas of G.P. Blair from the book: The Design & Simulation of Two Strokes.
You can also save and load the data by using the provided functions.

Note:
This coefficient Kh is called the horn coefficient, with typical values between one and two. Small values of Kh are best suited to Grand Prix engines with narrow power bands, larger values are for wider more flexible engines.

Recent changes:
1.0 First version
1.1 Added landscape mode and qVGA resolutions
1.2 Added hydroformed calculations as promised
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File size
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About 2 Stroke exhaust calculator
A simple 3 stage two stroke exhaust calculator based on formulas of G.P. Blair from the book: The Design & Simulation of Two Strokes.
You can also save and load the data by using the provided functions.

Note:
This coefficient Kh is called the horn coefficient, with typical values between one and two. Small values of Kh are best suited to Grand Prix engines with narrow power bands, larger values are for wider more flexible engines.

Recent changes:
1.0 First version
1.1 Added landscape mode and qVGA resolutions
1.2 Added hydroformed calculations as promised

Android Market Comments
A Google User
Jul 3, 2015
Awesome!!... But coeficient for what...i dont understand..
A Google User
May 24, 2015
Expansion chambers are awesome!!.........I've owned12 2 stroke street bikes I think the funnest and most surprising bike i had was a Kawi S2 (3 cyl 2 stroke 250cc) It was a late 70's model i bought from a young guy who'd only had it 1 month and "looped it". he tried to ride a wheelie before he mastered his basic riding skills. The bike had chrome Denco pipes,clip-on's for handle bars and a good quality set of set back foot pegs.Whoever piped that bike installed a taller toothed rear sprocket and weisco short skirt pistons. When i got it i immediately installed new ignition points, condensers and spark plugs.changed gear box oil. The fun power band began around 8500rpm and HONESTLY pulled past burying the needle....the tachometers numbers only showed up to11,000rpm but that bike did not quit pulling until 16,000.I've had KH 500's and 750's also. A few RD's too. My next project is an Echo 63cc blower motor converted onto a beach cruiser. Im going to build my own pipe out of 18 gauge stainless steel and tig weld to perfection.
A Google User
Apr 2, 2015
Expansion chambers are awesome!!.........I've owned12 2 stroke street bikes I think the funnest and most surprising bike i had was a Kawi S2 (3 cyl 2 stroke 250cc) It was a late 70's model i bought from a young guy who'd only had it 1 month and "looped it". he tried to ride a wheelie before he mastered his basic riding skills. The bike had chrome Denco pipes,clip-on's for handle bars and a good quality set of set back foot pegs.Whoever piped that bike installed a taller toothed rear sprocket and weisco short skirt pistons. When i got it i immediately installed new ignition points, condensers and spark plugs.changed gear box oil. The fun power band began around 8500rpm and HONESTLY pulled past burying the needle....the tachometers numbers only showed up to11,000rpm but that bike did not quit pulling until 16,000.I've had KH 500's and 750's also. A few RD's too. My next project is an Echo 63cc blower motor converted onto a beach cruiser. Im going to build my own pipe out of 18 gauge stainless steel and tig weld to perfection.
A Google User
Mar 6, 2015
Great starting point app. Does exactly what most people will need. Cheers!
A Google User
Feb 20, 2015
Seems like a food app Started using it today and not sure if measurements are in millimeters or inches. Seems like its lacking some helpful information