[Edgewood121]

Curious to see how accurate this could be. Just finished with the degree wheel for setting the pointer and cams and figured I'd experiment a bit. For perspective, gauge actually fits inside a double-row SPICA pulley (though no crank bolt). I am running the single row SPICA pulley. Gauge does not need to be centered (but should be flush with front of engine), so easy set-up. Remove the spark plugs and use a strap wrench to turn the crank pulley (though I turned the flywheel). I leveled it to show 0-degrees, then checked 0.050" BTDC/ATDC.

Looks to be pretty accurate for most purposes. I'd say my pointer is off a smidge!

Not a rigorous experiment but thought I'd share.

 

[Edgewood121]

interesting, thankyou!.
I considered this but wondered how one would read the gauge with the engine installed. I ended up using a normal degree wheel, pointer and a camera set up and zoomed in, with the display (an old phone) mounted conveniently. This would of course read you digital gauge also, but I wonder if gauges like yours can be had with remote displays?

Yes, while I was searching for digital gauges, I did come across some that were blue-tooth ready for cell phones. In any event, I was thinking to view the gauge through the front bumper if the engine is in the car. Should be able to get a good look at the display.

If I wasn't so anxious to get my engine back into the car, I would have liked to spend more time comparing to the degree wheel for cam timing. In the future, with the engine in the car, I will try the digital gauge to start and see how things go. Along with ease of set-up (gauge does not need to be centered), it seems just as accurate as a degree wheel.