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Re: 360 performance rebuild questions
[Re: Moparbil]
#575672
01/07/10 12:48 PM
01/07/10 12:48 PM
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Joined: Apr 2007
Posts: 1,261
ILL
mark7171
pro stock
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pro stock
Joined: Apr 2007
Posts: 1,261
ILL
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If this is your first 360 keep it sijmple. Use factory magnum heads and valvetrain. File fit the speedpro rings on the 107's. good luck
Last edited by mark7171; 01/07/10 12:49 PM.
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Re: 360 performance rebuild questions
[Re: mark7171]
#575673
01/07/10 01:02 PM
01/07/10 01:02 PM
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Joined: Sep 2004
Posts: 2,091
oberlin, Ohio
Rapid340
top fuel
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top fuel
Joined: Sep 2004
Posts: 2,091
oberlin, Ohio
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Since KB hyperuetectics require a large top ring gap you should not need to buy file fit rings if you are going with a reasonable piston to wall clearance (.0015-.003).
1971 Factory Appearing Duster 340 11.000 @ 122 mph
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Re: 360 performance rebuild questions
[Re: Moparbil]
#575674
01/07/10 02:10 PM
01/07/10 02:10 PM
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Joined: May 2005
Posts: 41
Denmark, Aeroe
Moparbil
OP
member
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OP
member
Joined: May 2005
Posts: 41
Denmark, Aeroe
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Quote:
Going to but put a 360 together.
Rotating parts are stock. Pistons are Keith Black 107 they are about 85 g lighter than the stock pistons. Has been told balancing is not necessary since they are out balancing each other.
Is that correct?
Piston rings are sold as file fit or non file fit.
What do I need for the KB107 ?
What is the difference ?
Will sealed power rings for 36$ do well, or shall I go for perfect circle for 100$ both are with moly. ?
Rocker arm kits are sold as 1.5 or 1.6 ratio
What to use ?
Thanks all
well, file or non file fit I am confused. Do I understand it right ? Is file fit rings to be grinded to ring gab tolerance and non file have the correct tolerance out of the box. ?
Speedpro rings are mentioned is that the cheap ones ?
The dilemma also goes for the main and rod bearings, shall I buy standard or is the more expensive performance bearings needed.
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Re: 360 performance rebuild questions
[Re: Rapid340]
#575675
01/07/10 02:12 PM
01/07/10 02:12 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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You will need to file gap the rings to get the proper top ring gap on the KB107 pistons. If you don't go by their specs expect to have trouble. I for one have never balance my engine running them and it has never let me down. I know sever people running with KB pistons in both big and small blocks that haven't and have no problems or excessive vibrations and the engines have been very good longevity. None of us over twisting the engines and stick pretty close to 6000. 
Clean it, if it's Dirty. Oil it, if it Squeaks.
But: Don't fix it, if it Works!
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Re: 360 performance rebuild questions
[Re: MoparforLife]
#575677
01/08/10 10:35 AM
01/08/10 10:35 AM
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Joined: May 2005
Posts: 41
Denmark, Aeroe
Moparbil
OP
member
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OP
member
Joined: May 2005
Posts: 41
Denmark, Aeroe
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Only the top ring on KB107 need a little extra gab, is not possible to file a non file fit ring to correct tolerance ? At Summit file fit rings are nearly three times more expencive than non file fit. Regarding rod bearings do I need to use performance bearings or just P series for this set up. Its going to used on street only.
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Re: 360 performance rebuild questions
[Re: Moparbil]
#575678
01/08/10 11:12 AM
01/08/10 11:12 AM
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Joined: Jan 2003
Posts: 715
British Columbia
plumcrazy101
super stock
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super stock
Joined: Jan 2003
Posts: 715
British Columbia
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Quote:
Only the top ring on KB107 need a little extra gab, is not possible to file a non file fit ring to correct tolerance ?
At Summit file fit rings are nearly three times more expencive than non file fit.
Really... A ring grinder doesn't care if you have file to fit rings or standard gap rings as it will grind them all.
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Re: 360 performance rebuild questions
[Re: plumcrazy101]
#575679
01/08/10 11:31 AM
01/08/10 11:31 AM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Quote:
Only the top ring on KB107 need a little extra gab, is not possible to file a non file fit ring to correct tolerance ?
At Summit file fit rings are nearly three times more expencive than non file fit.
Really... A ring grinder doesn't care if you have file to fit rings or standard gap rings as it will grind them all.
I agree. Have built many of them and used ring grinder (much easier and more accurate than a file) an it could care less what kind of ring it grinds and will give you a correct ring gap. Always make sure to smooth the edges of the trim no matter what ring you use. I have seen many times where a regular fit ring needs to touched up a bit to get the correct gap. 
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