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Message: <blockquote data-quote="dsrtjeeper" data-source="post: 1589387" data-attributes="member: 20897">In the posters original post he states and I quote "Now after a few light pulls on a hot day it’s sitting at 222 just cruising." He didn't state at idle nor did he designate a speed. "A few light pulls" with a 500hp engine will, more than not, produce more heat than a 200hp engine. These engines are not 100% efficient. Energy is always wasted. Maybe you can explain why a factory stock cooling system cooled my '94 when bone stock but couldn't do so when I built a stroker. You're forgetting at least one component that causes a 500hp 331 or 347 to run hotter than a 200hp 302. Bore size. What happens when you increase bore size in the same 302 block? I'm assuming a stroker as a 500hp 302 is a whole different animal.</blockquote>