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<blockquote data-quote="Diplexers" data-source="post: 719027" data-attributes="member: 550866">I agree.&nbsp; I have been building rods with my father since I was a toddler.&nbsp; The number one rule for horsepower is &quot;there is no substitute for cubic inches&quot;, bottom line.&nbsp; What ever you do to an engine, no matter what, another, larger engine with the same type mods WILL produce more torque and horsepower.Now a 383 Chrysler motor compared to a Ford 389 isn&#039;t going to mean the Ford will automatically outperform the 383 because it has 6 more cubes.&nbsp; First thing is most the time the motor won&#039;t have its actual displacement advertised.&nbsp; If you do the math, surface area multiplied by the stroke, most engines aren&#039;t &quot;right on&quot;, mainly do to marketing schemes.&nbsp; Second, its too close for the actual displacement to make a big difference.&nbsp; This is when engine design plays a bigger role in its performance.For example: If you take the stock Chevy 454 Chevelle and pin it against a stock Plymouth 440 GTX, the GTX will undoubtedly eat the Chevelle for lunch.&nbsp; However once you mod both engines to death (similar mods), the Chevelle will win hands down.As long as engines x vs engine y have the same mods, the larger will produce more power everytime.</blockquote>

[QUOTE="Diplexers, post: 719027, member: 550866"] I agree. I have been building rods with my father since I was a toddler. The number one rule for horsepower is "there is no substitute for cubic inches", bottom line. What ever you do to an engine, no matter what, another, larger engine with the same type mods WILL produce more torque and horsepower. Now a 383 Chrysler motor compared to a Ford 389 isn't going to mean the Ford will automatically outperform the 383 because it has 6 more cubes. First thing is most the time the motor won't have its actual displacement advertised. If you do the math, surface area multiplied by the stroke, most engines aren't "right on", mainly do to marketing schemes. Second, its too close for the actual displacement to make a big difference. This is when engine design plays a bigger role in its performance. For example: If you take the stock Chevy 454 Chevelle and pin it against a stock Plymouth 440 GTX, the GTX will undoubtedly eat the Chevelle for lunch. However once you mod both engines to death (similar mods), the Chevelle will win hands down. As long as engines x vs engine y have the same mods, the larger will produce more power everytime. [/QUOTE]

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