slabby11
Oviraptor
Posts: 19 
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Post by slabby11 on Nov 30, 2014 13:27:19 GMT
I'm just about to get my bandit barrels bored to fit busa pistons and I did a quick google to check what clearances I need, on an SV forum it was mentioned that the busa piston rings are designed to work with the busa's coated bores but there was no conclusion about what effect using them in normal liners would be.
Are the busa rings ok to use or are SV rings (same size, steel liners) the better option?
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Post by beerbellykelly on Nov 30, 2014 16:46:08 GMT
Straight in iron liner -
Check gaps are to factory spec - usually around .4000"
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slabby11
Oviraptor
Posts: 19
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Post by slabby11 on Dec 1, 2014 16:46:49 GMT
Ok, thanks for the reply.
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greybush
Velociraptor
Posts: 27
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Post by greybush on Dec 27, 2014 2:42:16 GMT
i just dropped off my pistons and cylinders off yesterday for my spare motor to be bored, the last set i had done had .003" total clearance with .015" ring gap. this was in 2009, i put alot of miles on the old motor with peak boost up to 18 lbs with no ring or piston problems. I am having my new set bored the same.
This is what i did and it worked for me.
Hope this helps
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Post by katana on Dec 27, 2014 10:05:41 GMT
Straight in iron liner - Check gaps are to factory spec - usually around .4000" 4/10ths of an inch....you havin' a giraffe? smileystick |
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Post by captain chaos on Feb 19, 2015 19:20:43 GMT
Thread bump  Going to gap the rings (Busa pistons in bored out 1127 barrels, turbo use, new rings bought from Suzuki), and I hear different stories about how much the ring gap should be. Any definite answer please? |
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Post by katana on Feb 20, 2015 9:02:15 GMT
Aim for 0.2 - 0.35mm, the 2nd ring can be a little looser ie. upto 0.5mm. If you want performance from the off and not too worried about ring life then add 0.15mm to each of the figures.......Happy?
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Post by captain chaos on Feb 20, 2015 10:14:48 GMT
Cool, thanks.
How about the oil rings? Just fit them without doing anything?
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Post by katana on Feb 20, 2015 13:47:25 GMT
No spec's for Oil rings, we normally just fit as is.
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Post by captain chaos on Feb 20, 2015 13:49:02 GMT
That's what I thought as well.
I don't normally do this, this is the first time I build an engine for turbo use.
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