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Cam Motion is happy to provide our handy Cam Motion Cam Timer free for download to tech savvy engine builders, racers & enthusiasts.
This quick and handy camshaft valve event calculator is quick to pull up and easy to use. You can change any of the fields (except for overlap) and all of the other fields will automatically update after clicking the update button. You can open multiple instances of this application at once, so comparing a few different profiles is easy.
Here is a preview image of the program:
This windows application download is contained in a .zip file. Merely download the .zip file from the page linked to below, unzip the file and it is ready to go. Enjoy!
Here is another handy one for you all. It is a static & dynamic compression calculator. Like the Cam Timer, it is quick and easy to use, allows you to update any field (except for the calculated compression ratios) and you can have multiple instances open at once, which can be very handy when comparing different compression or camshaft scenarios. Check it out!
For a traditional dynamic compression caclulation, you would use the specs that represent "seat timing". This is typically expressed as "advertised duration", .006", .004" or even .000". So, in your example you would choose the .002" duration numbers
For a traditional dynamic compression caclulation, you would use the specs that represent "seat timing". This is typically expressed as "advertised duration", .006", .004" or even .000". So, in your example you would choose the .002" duration numbers
Is there an "industry standard" so one guy can compare his DCR to another guy's DCR?
Who uses .000"? The IVC could be anywhere after the valve closes, lol.
Is there an "industry standard" so one guy can compare his DCR to another guy's DCR?
Who uses .000"? The IVC could be anywhere after the valve closes, lol.
Not really. Some cam companies use .006", some use .004" etc. For the small difference that it might makes, I would not worry about it. With all of the deflection and variables that take place as the the valve train comes under load, it is not as precise as you might think.
In regards to the .000", that would have been better communicated if I had said .000" lash. Over the years I have seen "advertised duration" reported as duration at .000" lash. It would basically mean as soon as the cam lobe starts to move the valve train if the lash were set to "0".
Last edited by CAMMOTION PERF; Sep 23, 2015 at 01:16 PM.
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Cam Timer Valve Event Calculator by Cam Motion 
