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Author Topic:   ? for Steve
ford5
Member
posted August 11, 2003 09:38 PM
had a customer today bring me a 408 Ford windsor oval track engine to freshen up, it has several races on it, but not all that many. it was having alot of blowby, and when i dismantled it to inspect , i found the top ring lands extremely wornout, like so bad that you could almost put 2 rings in the groove. but not on every piston , only about 3-4 are that way. just wondering what might have caused this? never really seen this extreme condition before while all else appears to be in good shape. the pistons are Diamond brand alky fueled....ford5


sdhnc29
Member
posted August 11, 2003 10:27 PM
That sounds extremely strange ! What ring pack do these pistons have ? Do you know any of the history on this particular engine ?

Steve

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


ford5
Member
posted August 11, 2003 11:14 PM
1\16 1\16 3\16 +030 it has sealed power rings.....i raced against this motor myself and know a little about its history.......what you wanna know? it was originally built by Wynnes Speed in Mississippi ford5


sdhnc29
Member
posted August 12, 2003 09:01 AM
Ok , the only times that I've ever seen excessive ring land wear is from pistons that are extremely old , which it sounds like these are not , from an excessive amount of dirt being inhaled into the engine , which will usually result in excessive bore wear too , and lastly if the wrong ring was used in on the piston . It's a possibility that the last person to assemble the engine used a 1.5mm top ring rather than a 1/16" ring . There is only about .003" difference in thickness between the 1/16" and 1.5mm ring . But ......... this is enough to allow the 1.5mm ring to flutter up and down quite a lot and wear out/destroy the ring groove . To only have this problem on 3 or 4 pistons might be a result of mis-packaged rings ,( 3 or 4 1.5mm rings thrown into a set of 1/16" rings ). If the first two problems that I mentioned are not true , then I'd look toward the wrong ring for the ring groove causing this problem .

Steve

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


ford5
Member
posted August 12, 2003 09:42 AM
thanks steve, i will look into all these possibilities, your help is greatly appreciated.....ford5


sdhnc29
Member
posted August 12, 2003 05:57 PM
No problem .

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


stockcar5
Member
posted August 12, 2003 07:52 PM
could a ring gap being to tight cause this??

luke

hamer36
Member
posted August 12, 2003 10:04 PM
cast pistons that are wound too tight? maybe?...


norightturn
Member
posted August 13, 2003 07:40 AM
Not enough ring end gap usually causes broke rings not land wear. Just an FYI


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