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Old 01-20-2003, 07:31 AM
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Post What kind of rings should I use??

I have a small block chevy 350. The engine is a high-nickle block and there was very little ridge on it, the block will not be bored just new rings and bearings. They have 3 different types of rings for sale. Cast iron, molly, and crom-molly. Which should i go for. It is a street motor, with stock cam, stock intake, so it is basically an everyday driver engine so what type of rings are the best for my aplication. I will not be reving it up, i just want reliable rings that would seat in correctyl and give me least problems

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Old 01-20-2003, 08:55 AM
abe abe is offline
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i would use the moly rings. Cause i have a 350 high nickle block myself.
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Old 01-20-2003, 12:58 PM
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Thanks for posting abe, but why should i go with moly instead of the other 2 choices??
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Old 01-20-2003, 01:13 PM
abe abe is offline
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Cast iron rings are old technology. 2nd chrome moly are best suited for dirty applications such as off road etc. And the chrome rings takes longer to seat and so does the cast iron rings. Moly rings seat very quickly and are very resonable priced. Just make sure u hone the cylinders for those moly rings with the correct grit. And the moly rings will give excellent service for the street and long life. just make sure u change the oil when it needs to. I just bought a master overhaul kit from Northernautoparts are upgraded to moly rings which are Sealed Power brand .they have excellent brand name parts and u can upgrade your stuff.
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Old 01-20-2003, 05:40 PM
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if you are not going to bore the block and you have a used bore the only ring to use is the cast iron. The chrome ring will not tolerate the non perfect bore and will always use oil, same for the moly ring it needs a round bore and correct finish to seat.
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Old 01-20-2003, 06:25 PM
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Thank you for your replies, i went out today and baught moly rings. Should i return them and get the cast iron one's?? HOw much problem would the moley ones be in a engine that had very very little ridge? So that means little wear. Also for installing rings i heard use a hone then very fine emery-cloth make marks in the pistons to make a good cross hatch what u guys think??
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Old 01-20-2003, 06:38 PM
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yes you need a crosshatch hone pattern, the problem with the average spring load hand hone is they are 320-280 grit, moly needs a 400 grit or you just abrade the moly filling from the top ring, also on a used bore a berry bush or dingle ball hone works very well, but again grit size is limited. you need approx 35degree scratch pattern on the cylinder walls. you have the moly rings use them just remember on a used bore it's wise to use cast rings, quicker break in, more tolerant to imperfection and cheaper.
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