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Old 08-16-2021, 07:51 PM
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speedracerntrixie's Avatar
Join Date: Jun 2010
Location: Happy Valley, Oregon
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I think you are pushing it with 20%. The engine compression ratio is really at the point where 15% is about the max I would run. That said, try an Enya #4. The Enya plugs are a bit more durable then the OS and with the higher nitro you need a cooler plug. Rule of thumb though for what you are doing is to use the coolest plug you can that will give you some sort of decent idle. Last time I raced we had a rule that required a 4,000 rpm idle.