Quote: The NASCRAP guys build their 358's based on what track they are running at. A Martinsville engine will have a different bore and stroke than a Talladega build. But still be a 358.
that's possibly due more for rod ratio than stroke.
talledega will have basically 500 miles near redline. you want a bigger rod ratio to keep piston speed down.
martinsville you're up/down the RPM range all day. with large port heads, a smaller rod ratio helps by accelerating away from TDC quicker, giving a stronger vaccuum signal, and possibly more midrange torque. it will create more piston speed for a given RPM, though, which can have detrimental effects on engine longevity if held at max RPM for sustained periods of time.
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