Which grit ball hone?

[Richard150MPH]

I had to dismantle a "Race" engine that has been sitting unfired for a long time.
Fellow who built it made some mistakes I will be correcting.
Of course the valves were not relieved and a little bit of condensation got into one cylinder.
Not "Rusty" but there are scattered brown specs.
I want to run a ball hone through the cylinder and inspect it again before going to the expense of having the cylinder sleeved.
Engine has an unfired set of NLA forged pistons I want to keep.
Current finish is what I would call very fine.
Found ball hones available at reasonable cost but unsure which grit to buy.

 

[77cruiser]

Usually the type of ring has a specified grit.

 

[Nashville Cat]

I've been storing two engines and sometimes the cylinders show specs of rust.
I used brown scotchbrite with aerokroil (or PB Blaster) and lightly rubbed it. Came right off

 

[Shaner]

I've been storing two engines and sometimes the cylinders show specs of rust.
I used brown scotchbrite with aerokroil (or PB Blaster) and lightly rubbed it. Came right off

I've always added grease when bare metal was sitting. Just cover it and it seemed to do the trick.

 

[Richard150MPH]

This is just beyond scothbrite ability to remove.
Forged pistons so a fraction of extra clearance should not hurt.
I did not build the engine originally so do not know what material the rings are made from.

 

[Nashville Cat]

An article:

Cylinder Bore Refinishing with Honing Tools

By ring friendly, we mean a finish that provides good support for the rings, retains oil and does not require a lengthy break-in period. For most engines today, a ring-friendly finish means a plateau finish.Click Here to Read MoreAdvertisement A plateau bore finish is what all types of rings...

www.enginebuildermag.com

 

[Richard150MPH]

Looks like I will be using 320, 240 seems a bit too rough and 280 is not available.
Thanks for the link.

I will hit all the cylinders to make sure they match.

 

[68Chevele]

I just use a super fine old ball hone I have, for me the shinier the walls are the better. Rings seat in faster.

 

[Nashville Cat]

The Flex Hone manual is attached. 120 , 180, 240 and 320 are the standard grits. I think I will use 320 on my engine build

 

[Nashville Cat]

Found a nice price here :

Flex-Hone Silicon Carbide Hones

Flex-Hones made of Silicon Carbide for cylinder head valve guides, engine oil passages, and general honing needs (deglazing engines, refinishing cylinder bore). For Aluminum Oxide material see our Nikasil application listing hones. If you cannot find the size and grit desired email us and we can...

enginehones.com

 

[Richard150MPH]

Hone arrived but still waiting on the oil.