There are tons of crappy borescope options out there. I've tested 2 of the shittiest ones from Harbor Freight and can happily report that they are shitty.

Does anyone out there have experience with anything good? I'd love to have:

1. Most inexpensive (I didn't say cheap).
2. Ability to inspect valves (180deg bend or mirror).
3. very close focal point (probably most important, our cylinders are small compared to like the aviation guys, who use them all the time).
4. good lighting

There are $20 to $20,000 options out there. Who has something they actually like?

 

https://www.miataturbo.net/engine-pe...5/#post1517251 Also see one post up, for context.

I ordered one of the WiFi ones today. It should be here tomorrow. It has much better reviews than the USB one. I did not order any mirrors, but they have kits.


I can let you know my experience Saturday.

 

I'll try and put together images from both the Harbor Freight and the crappy USB one that I got.

https://www.harborfreight.com/Digita...era-61839.html

 

I was wrong. The one I purchased did have the mirror kit with it. Scope works fairly well, except the lighting potentiometer is a bit finicky.

Here are some pics:

These are piston #2 taken at 1280 x 720 on my iPad using the battery on the scope.






Looks like some carbon buildup on the intake cut-outs.

Piston #3. In the past (6K miles ago), the plug showed some evidence of detonation (1280 x 720):




And at 19280x 1080:



Some open air shots:





That's all I have.

 

 

I've used the cheaper Snap-on model and it works pretty good. I wouldn't buy new, but like Schroedinger said they do pop up in classifieds often.