Will P15 piston rings work here?

[bamfordsgarage]

I'm working on my 1906 Orient Buckboard, a single-cylinder horseless carriage with a 3.25" bore and4-1/2" stroke, basically the same as a P15 or my Canadian D25.

 

Compression is poor and the rings could use replacement... would P15 rings work in this application? The bore is correct although ring height could be different.

 

See attached photos for dimensions and photos. All comments and suggestions welcome.

 

 

 

 

 

 

[Frank Gooz]

If you had checked the widths of the grooves.  next I would check the groove diameter and compare them also, to make sure the rings will also fitin your bore.

Good luck.

Happy new year you.

[desoto1939]

question on the buckboard. You show a picture of the engine with a flywheel. Is this similar to the type of flywheel that ws used on the Carter cars inwhich as you wanted to go faster the large flywheel then moved to the center of the flat disck to get more speed for the car?

 

rich Hartung

desoto1939@aol.com

[Dave72dt]

You need to also compare the depth of all the ring lands as well as the widths.  Will 2 of the P15 rings match the width of the Orient's ring land?  Are the P15's compression rings square or do they have a taper to them?  If all the dimensions match, you can probably make it work for you, especially for the limited use the Orient will see.  I think I'd use cast iron rings in this instance if given the choice.  I'd prefer the rings to wear more than the cylinder.

[bamfordsgarage]

Thanks for the replies… I missed the ring groove depth earlier, but have just measured it at 0.168” +/- 001”for all three rings.  

[bamfordsgarage]

20 hours ago, desoto1939 said:

question on the buckboard... Is this similar to the type of flywheel that ws used on the Carter cars inwhich as you wanted to go faster the large flywheel then moved to the center of the flat disck to get more speed for the car?

 

Yes and no: similar variable friction drive to the CarterCar and Metz for example, but moving the driven (spoked) wheel toward the perimeter of the drive (fly) wheel increases road speed, albeit with a reduction of torque (never plentiful at the best of times with this rig).

 

Conversely, shifting the driven wheel toward the centre of the drive wheel reduces road speed but increases torque, just what's needed for hills and starting-from-stop.

 

Moving the driven wheel past centre puts the transmission into reverse. I also use this position as the primary brake... there is only one dinky little band brake drum (like a P15 handbrake but much lighter) connected to the foot brake pedal.

 

[bamfordsgarage]

So, I've measured the ring land depth at 0.168" +/- and the ring hight as 1/4".

 

Unfortunately, I have no P15 rings handy to check thickness and depth, and I was unable to find anything further on this site. Would anyone have the specs on these, or perhaps a few on the shelf they could quickly measure?

 

Thanks in advance.

[Sniper]

37 minutes ago, bamfordsgarage said:

 

Yes and no: similar variable friction drive to the CarterCar and Metz for example, but moving the driven (spoked) wheel toward the perimeter of the drive (fly) wheel increases road speed, albeit with a reduction of torque (never plentiful at the best of times with this rig).

 

Conversely, shifting the driven wheel toward the centre of the drive wheel reduces road speed but increases torque, just what's needed for hills and starting-from-stop.

 

Moving the driven wheel past centre puts the transmission into reverse. I also use this position as the primary brake... there is only one dinky little band brake drum (like a P15 handbrake but much lighter) connected to the foot brake pedal.

 

 

It is a CVT lol, everything old is new again

[justold]

 Hi , 

 I think I would be paying attention to the ring land clearance on that piston . Unless it is a shadow it looks like there is a lot of land to ring clearance . 

 A good auto machine shop can machine the grooves and supply the correct spacers and rings .

             Good luck and a happy new year ,

                  Justold

[Plymouthy Adams]

 Snapper riding lawnmower less blade