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What grit hone?

Sonny

Sonny

It’s all fun til the rabbit gets the gun.
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Just checked my cylinder bores and the are good (engine only had 4000 miles before wiping a lifter). I want to do a light hone to get the cross hatching back (got new pistons and rings) but not looking to bore them. What grit ball hone should I buy?
Sonny
 
For a basic ring job, use what the ring manufacturer recommends. Different rings, different grit, moly, cast etc...
 
320 grit silicon carbide ball hone. I do 50 strokes on each cylinder to deglaze them.
 
Old ('80s) rule of thumb was 180 for standard cast rings, 320 for moly coated. This still works just fine. Modern builders have added additional steps with extra tools (brush) to achieve what they refer to as a plateau finish, if you want to go the extra mile.
 
Above is good numbers. Don’t go 50 strokes on a 4000 mile engine.

brush reaserch mfg BRM. has good quality. I just bought one in March and eBay had the best price.

this is the seller

https://www.ebay.com/usr/bracketracer
 
R413 said:
Above is good numbers. Don’t go 50 strokes on a 4000 mile engine.

brush reaserch mfg BRM. has good quality. I just bought one in March and eBay had the best price.

this is the seller

https://www.ebay.com/usr/bracketracer
Click to expand...
If a motor was recently done, and they are changing the rings, I usually limit it to 25 per cyl, and 50 per on an older (we're not gonna do it right) refresh...
 
Rich H. said:
Old ('80s) rule of thumb was 180 for standard cast rings, 320 for moly coated. This still works just fine. Modern builders have added additional steps with extra tools (brush) to achieve what they refer to as a plateau finish, if you want to go the extra mile.
Click to expand...
Keep in mind that this is not a Bore/Hone/Plateau, but rather just a deglaze and go situation...
 
Rich H. said:
Old ('80s) rule of thumb was 180 for standard cast rings, 320 for moly coated. This still works just fine. Modern builders have added additional steps with extra tools (brush) to achieve what they refer to as a plateau finish, if you want to go the extra mile.
Click to expand...
Should have stated I bought moly rings. Thanks!!
 
You'll probably hear every 90 year old recipe under the sun,,
But I use a 10-30 engine oil as directed by the fellows that make the tool :thumbsup:
 
Seeing how I do it in the jet wash, I just use WD40. It isn't rocket science: spray, spray, spray, and 25-50 strokes per hole. Wipe down to clean up and your done.
 
For moly rings, as mentioned just enough 320 grit to get the Crosshatch showing again.....Per the latest hone research, I think it's worth better break--in sealing & ring lifespan to finish them with a few strokes of 600 grit to effectively "plateau" & knock the high peaks off to pre--break the cylinder finish & prepare a better surface (with gnarly high peaks removed) for the new moly rings....Now's the time to do it with no regrets later...
 
70rcode said:
For moly rings, as mentioned just enough 320 grit to get the Crosshatch showing again.....Per the latest hone research, I think it's worth better break--in sealing & ring lifespan to finish them with a few strokes of 600 grit to effectively "plateau" & knock the high peaks off to pre--break the cylinder finish & prepare a better surface (with gnarly high peaks removed) for the new moly rings....Now's the time to do it with no regrets later...
Click to expand...
I have mixed opinions on this process. On my race car, I had less leakdown after a race without the 'plateau' hone and just finishing with 320. No way I would go 50 strokes with a ball hone. I usually count 10 to 20 and there is enough scratch in the cylinders for the rings to seal. I'm not saying 50 is detrimental, I'd just need to run my gauge in the bore before and after to judge. I know I've tried to help a guy do something half assed and we ruined his bore with a hand hone, so be careful. I make a mistake once, I don't repeat it, lol.
If it were mine, I'd use a 180 ball hone for about 10 strokes each with 10w30 oil, because what's not being addressed here is that honing machines in a machine shop use stones and ball hones are a completely different animal that leave a different finish. Google cylinder honing association(there is such a thing) and they'll have all the info you could possibly want.
 
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