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New Edge Cobras
Are the extra CIs worth in Boosted Applications?
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<blockquote data-quote="brkntrxn" data-source="post: 7586873" data-attributes="member: 12396"><p>Makes sense to me, Carlos. Common sense says that a smaller motor will have to up the boost to have the same power as a larger bore motor. In an extreme example just think about how much boost you have to had to 281ci to equal a naturally aspirated 460ci motor.</p><p></p><p>I think a better questions are these (once you have defined your horsepower goal):</p><p></p><p>- What is cheaper, building a smaller cubic inch engine to handle higher boost and a blower to produce high boost OR building a larger cubic inch engine to handle lower boost?</p><p></p><p>- Which combination is cheaper to maintain in the long run? Stress the smaller engine with higher boost (and the blower) OR stress the larger engine with a longer rod throw and larger bore? </p><p></p><p></p><p></p><p>-284CI @ 6500RPMs</p><p>AVE HP X PSI = 39.63</p><p>HP @ 10PSI = 513.7</p><p><strong><span style="color: yellow">HP @12PSI = 555.3</span></strong></p><p>HP @ 15PSI = 611.7</p><p>HP @ 18PSI = 680.0</p><p>HP @ 20PSI = 721.6</p><p>HP @ 25PSI = 825.6</p><p></p><p>-322CI @ 6500RPMs</p><p>AVE HP X PSI = 44.93</p><p><strong><span style="color: Yellow">HP @ 10PSI = 558.8</span></strong></p><p>HP @12PSI = 629.6</p><p>HP @ 15PSI = 700.3</p><p>HP @ 18PSI = 771.0</p><p>HP @ 20PSI = 818.2</p><p>HP @ 25PSI = 937.1</p></blockquote><p></p>
[QUOTE="brkntrxn, post: 7586873, member: 12396"] Makes sense to me, Carlos. Common sense says that a smaller motor will have to up the boost to have the same power as a larger bore motor. In an extreme example just think about how much boost you have to had to 281ci to equal a naturally aspirated 460ci motor. I think a better questions are these (once you have defined your horsepower goal): - What is cheaper, building a smaller cubic inch engine to handle higher boost and a blower to produce high boost OR building a larger cubic inch engine to handle lower boost? - Which combination is cheaper to maintain in the long run? Stress the smaller engine with higher boost (and the blower) OR stress the larger engine with a longer rod throw and larger bore? -284CI @ 6500RPMs AVE HP X PSI = 39.63 HP @ 10PSI = 513.7 [B][COLOR="yellow"]HP @12PSI = 555.3[/COLOR][/B] HP @ 15PSI = 611.7 HP @ 18PSI = 680.0 HP @ 20PSI = 721.6 HP @ 25PSI = 825.6 -322CI @ 6500RPMs AVE HP X PSI = 44.93 [B][COLOR="Yellow"]HP @ 10PSI = 558.8[/COLOR][/B] HP @12PSI = 629.6 HP @ 15PSI = 700.3 HP @ 18PSI = 771.0 HP @ 20PSI = 818.2 HP @ 25PSI = 937.1 [/QUOTE]
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Are the extra CIs worth in Boosted Applications?
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