Focus Fanatics - View Single Post - 170 to 200hp hp goal
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Old 11-25-2012, 04:26 PM   #45
felixthecat
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Join Date: Nov 2010
Fan#: 80663
Location: Renton, WA
What I Drive: '05 Silver Sport Technologies

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I threw out the rod to stroke ratio's, to compare airflow. When someone says to build a small displacement motor & have it make the same power as a bigger one, ok go ahead then. Longer stroked motors have a lot of airflow, compared to shorter strokes. Hence more rpm for hp. It doesn't matter if its a hog motor w/ a offset crank pins or a V/12. Look at a small chysler motor= 273,318, 340 all use a 3.31 stroke w/ a 6.123 rod which gets you a killer rod to stroke ratio of 1.85. With that you have the piston dwelling at the top of the head longer which gives you more mid range toque. Where the chev guys were paying 600.+ for 6'' rods. Those small block chryslers worked great for me in sprint cars.
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