11-09-2020, 01:00 PM
Hi Duncan
I’ve been meaning to try a couple of apps on my iPhone but haven’t got round to it yet. One uses the engine noise to record revs, the other the camera to “strobe” onto a marker. Probably neither will work as you are going along but at least you can get a handle on the engine noise at certain revs AND depending on what rev counter you end up with provide a calibration. My Cheap Indian rev counter is obviously way out so I hope to use the phone app to calibrate and fit a new dial.
Cheers
Howard
PS Bill Williams book provides some great tables in the back which correlate engine revs to speed for various CW/p ratios and tyre/wheel sizes.
I’ve been meaning to try a couple of apps on my iPhone but haven’t got round to it yet. One uses the engine noise to record revs, the other the camera to “strobe” onto a marker. Probably neither will work as you are going along but at least you can get a handle on the engine noise at certain revs AND depending on what rev counter you end up with provide a calibration. My Cheap Indian rev counter is obviously way out so I hope to use the phone app to calibrate and fit a new dial.
Cheers
Howard
PS Bill Williams book provides some great tables in the back which correlate engine revs to speed for various CW/p ratios and tyre/wheel sizes.