alternate R16 pistons

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JT68
Talented Enthusiast
Posts: 2920
Joined: Sun Jan 27, 2013 9:43 am
Location: Cumming, GA

Re: alternate R16 pistons

Post by JT68 »

12:1 is madness in a street roadster engine. Without really smart real-time engine management (like ~2010 and later) with accurate/reliable knock sensing, you'll have to retard the timing and richen the mixture so much it will run pathetically compared to a properly tuned engine, or else you will be detonating any time you accelerate or have any significant loading. 9or10:1 is a FAR better choice for USA gas. 10:1 will still want 93-94 octane to avoid the de-tuning to compensate. How much is 110 octane/gallon?-Again, nuts for a street engine. Waive off, waive off! 12-13:1 is race gas territory.
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