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Old 06-02-2024, 06:55 AM
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HWYSTR455 HWYSTR455 is offline
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Interesting for sure. Well top ring is more critical in 'most' apps but am guessing the engine was purpose built for something that has either high peak RPMs and/or sustained higher RPMs? Or possibly for dyno competition? Top ring had a tight gap?


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Old 06-02-2024, 09:51 AM
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Originally Posted by HWYSTR455 View Post
Interesting for sure. Well top ring is more critical in 'most' apps but am guessing the engine was purpose built for something that has either high peak RPMs and/or sustained higher RPMs? Or possibly for dyno competition? Top ring had a tight gap?


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Enlarging the gaps as you go down from the top helps engines with vacuum pumps. Generally the gap keeps getting bigger until you get to the the bottom oil ring.

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