Lapping Piston Rings

[spybot]

if you still need a "proper breakin" then there is still an issue that could be fixed before you run the engine surely?

In what way ???

[powerabout]

Explain what proper breakin is doing?
If something changes during breakin then clearly it could be done prior with all these modern ring and bore finishes whats the issue?
Build it and do a full power run immediately then check leakdown

[Chaz]

It's not so much issue's that are fixed , as it is advancements in the ability to hold parts to a higher tolerance as well as do a great deal of the "break-in procedure" before the block ever leaves the honing tank.
Still , parts are parts . The best running motors are run , run in . taken apart and the high spots are buffed down on the piston , in the cylinder and some times the rings are changed if the pattern is not acceptable . To some , that process is worth repeating more than once . 99.9999999% of the people could care less about a multi-stone cut let alone finishing up with an Osborne brush in reverse rotation .

[eli]

would you run plateau brush in reverse ?

[Chaz]

would you run plateau brush in reverse ?

Ever get into serious knife sharpening ?

Watch what's done with the curl (burr) in the final stages and you'll see the same principal applies .

[eli]

makes sense ,i did not run plateau brush in reverse but made one heck of difference on how the bores look

[HydraSport179V]

The makers of the flex hone have published several papers onthis topic. See the blue and red papers. Alittle dated but still good information…


http://www.brushresearch.com/literature.php?type=2

[texasvector]

The makers of the flex hone have published several papers onthis topic. See the blue and red papers. Alittle dated but still good information…


http://www.brushresearch.com/literature.php?type=2

awesome

[Chaz]

These are more what I was referring to .

http://www.cylinderheadsupply.com/33plbr.html

[texasvector]

These are more what I was referring to .

http://www.cylinderheadsupply.com/33plbr.html

thats what we just used on last re-ring....brought comp back up....like eli ^^^^^i didnt spin it backwards....next time i will

thanks for help the other night CHAZ