12-04-2023, 12:04 PM
You mean the timing gears? What is driving you to that conclusion?
I venture that the optimal backlash (measured with feeler gauges) is about 3-4 thou minimum. A bit more is not massively harmful, but increases noise.
David Dye makes new gears.
I had trouble on my RP's engine as everything I tried was too tight, or a massive gap. In the end I paired up two random gears which were in good shape and gave a suitable amount of backlash - hasn't failed yet.
I venture that the optimal backlash (measured with feeler gauges) is about 3-4 thou minimum. A bit more is not massively harmful, but increases noise.
David Dye makes new gears.
I had trouble on my RP's engine as everything I tried was too tight, or a massive gap. In the end I paired up two random gears which were in good shape and gave a suitable amount of backlash - hasn't failed yet.