Just saw an ad for a fiber timing gear for sale. Nope. I've already been down that road.
I have run them for about 40 years in my '27 and 15 years in my '13. I admit that I am a "stickler" about getting perfect gear mesh of my timing gears, so my engines are quiet and reliable!!
Martin Vowelland I were talking with taking with Larry Blair about these and said the Older ones from back in the day were fairly reliable. That newer ones (time frame ??) the composite was poor and are only good for emergency back up while on tour. Yes , generators seem to chew 'em up. Not to much trouble on non generator cars, but your results may very.
A lot depend on if they are macerated or laminated. The macerated are short fibers that are compressed with a glue to hold them together and laminated are sheets of woven fabric that are glued and compressed. The gear that Steve shows looks like a macerated one. Model A's which are under more stress, the laminated ones work fine.
I have had fiber timing gears let go on model T and model A Fords and a couple of early V8 Fords as well as Chevrolet 6 and two Volvos and. Toyota.
I have also replaced the chain and fiber or plastic toothed cam sprockets on several late model 360 Chryslers.
I did a Mustang ii V8 that broke the plastic cam gear and it bent a few valves.
A lot of work and a lot of expense
I never put any engine back together without an all metal gear or sprocket.
I don't consider solid metal sprockets or gears noisy, although some can be heard, but not from the driver's seat.
I prefer a noises engine over one that won't run.
Some of the Korean cars were using fibre gears in their Diffs a few years back with horrendous results.
Probably work well enough in Countries were they drive them for 50,000km and then crush them.
While we are strolling down this road, what are the reviews on the newer nylon gears (I think they are nylon). How do they hold up with generator engines?
I had one on my '15 for about 1000 miles. No generator, freshly rebuilt engine, new everything. It looked like the one in Steve's picture when it failed. Never again.
Right now I have the following timing gears all working fine:
White nylon 1912 touring 4500 miles
Bronze 1915 touring 22,000 miles
Aluminum 1914 Touring 40,000 miles
Original straight cut cast iron 1917 runabout 5500 miles
Original angle cut cast iron 1923 touring (no telling how many miles)
By the way the only one of my cars with charging provisions on the engine is my '23. The generator was failed when I got it and the replacement brand new alternator didn't work brand new out of the box.
I am sure glad I stayed with my intuition and stayed with steel timing and motor gears on a 1918 we are rebuilding.
more than half is ok.