![]() read moreĬalculate your carburetors richness thru the whole throttle range to know what to change (pilot jet, slide cutaway, needle, needle jet, and main jet) for perfect air/fuel ratio throughout. This is not a rehash of the old outdated port time*area formulas but rather it relies on the true blowdown time (the time it takes for the exhaust pulse to go to zero pressure). The max RPM allowed is 48,000.Ĭalculate the amount of exhaust/transfer overlap to see if you need to change the port height for best power. This allows you to analyze an existing pipe or design your own for the desired powerband and top RPM. Max RPM allowed is 15,000.Įxpansion Chamber Analysis & Design for high RPM mini engines This is a complex return wave simulator that allows you to analyze an existing pipe or design your own for the desired powerband and top RPM. Each programs usage instructions tells how to do manual entry if you can't use macros.Īlso you can use iCloud Numbers (but without macro ability). Unfortunately it won't let you use macros but they are not essential in most cases, just time savers. Then upload the Excel files and then click on any one to use it on-line. Just sign up for your free OneDrive Personal Cloud Storage then click "Create Free Account". Some helpful videos of mine: Intro to using spreadsheets, My Spreadsheets Overviewĭownload my free calculators spreadsheet to check your computers ability to use it.Īlso, you don't even need Excel on your computer/phone. Click here to get a free download of Open Office. Open Ofice doesn't allow macros though which makes program usage a bit more time consuming. If you don't have Excel or have a version of Excel that doesn't work with macros then you can buy Microsoft Office 365 for $70 at or use Open Office. The following are spreadsheets for different aspects of 2 stroke design/modification. Typically for any optimization we go over jetting, compression, squish band, porting, timing, and pipe.Ĭlick here to download the Word document to fill in the needed data to then send to me. Two Stroke Design/Modification Software Two Stroke Design/Modification Softwareįor the same price as the software you can hire me to figure out what you need calculated. ![]()
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March 2023
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