Cylinder Honing Practices
Posted June 30, 2009 - 09:48 AM
First off, what type of hone do most of the engine builders prefer? Bar hone or Ball flex hone? What about iron vs. plated cylinders, which to use and what grits does everyone use? It seems a lot of builders seem to be using the ball flex hones now. Is this a more common practice with plated cylinders?
Posted June 30, 2009 - 10:28 AM
With an iron barrel, a bar hone. In this case, you are scraping off the glaze and re-working the surface. In this case, the barrel bore becomes larger and requires the piston and rings to be re-fitted.
Posted June 30, 2009 - 12:50 PM
Posted June 30, 2009 - 03:21 PM
quick clean of plated or iron bore.ball hone is fine.
fitting a piston to a bore? obviously you need a rigid hone.
180 grit to 240 grit hones are fine for the quick clean.
Posted July 03, 2009 - 07:16 AM
The term 'Glaze' refers to baked on oil and fuel deposits. No one said you have to hone to clean up a barrel. It is your engine, build it as you see fit. I think most want to scrape the glaze off (NikaSil) or freshen the honing edges on the barrel (iron).
Posted July 03, 2009 - 07:43 AM
This is going to go against everything you've been taught: http://www.angelfire...kes/dnthone.htm
Agree with the link posted, as far as most honing does more harm then good, especially backyard honing. His point of using soft cast iron rings isn't always an option though. Most modern engines use hard chrome faced rings on very hard plated cylinders, a different scenerio, this is where proper sizing and fitment and a good hard run in becomes more important than if the the nicasil was scratched up (honed) prior to assembly. If there's oil in the engine there will be high temperature oxidation around the ring land area (1200f) and a resulting glaze or film on the bore. This can be removed chemically without scratching he bore surface with somehting like solvents or oven cleaner and a nylon scrub. Much better than trying to clean it off with stone.
Posted July 03, 2009 - 09:20 AM
Posted July 12, 2009 - 04:42 PM
Posted July 13, 2009 - 09:55 PM