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.
Good app if you have the need for i 2 stroke exhausts are an art form , it is good to see this app. With pollution restrictions these days it will soon be hard to even find small 2 strokes.
Twins/triples? The equation seems to be for single cylinder only. Would be nice to have a number of cylinders/pipes option
Need more options Its not too bad but the pipe diamensions are not what im used to for 25 - 30.5 cc motors. Would be good if you could have intake & transfere durations in the calc but also a reed option
How do u calculate coefficient?? Anyone other wise the app is great and does it calculate in mm?
Great starting point app. Does exactly what most people will need. Cheers!
1.0 First version
1.1 Added landscape mode and qVGA resolutions
1.2 Added hydroformed calculations as promised