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Old 11-19-2002, 12:45 AM
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Post SBC NOS piston question..just how much?

Im running a 4 bolt 355, Eagle steel crank, Eagle "H" beam rods, 10.3-1 compression. Im planning on a NOS system (approx. 200HP max). Can anyone tell me just how much distance the top ring should be dropped down to accomendate this NOS package??? Im asking because Jeggs sold me SRP pistons that measure approx .223 from top of piston to top of upper ring. They said these pistons would work well with my engine and NOS package. Any proven experience would be GREATLY HELPFUL before I machine block to these pistons. THANKS ALL DY.

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Old 11-19-2002, 05:25 AM
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I cant give any proven experience, just can say that you are founded in questioning. Heat on the top ring can be a problem. However, as long as you dont try to push the fuel mixture too lean, I think you will be fine. That edge right before detonation when the engine really hums is the point where ***** can happen if you dont watch it. Keep the a/f ratio around 13:1 or so, and you should be fine. Just an educated opinion though.....

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the srp piston will work fine, just be careful with the ring gaps, a little extra won't hurt. the biggest problem i see on nitrous motors is not enough top ring gap and when the ring butts,off come the top ring lands, then the owner blames the piston co.
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