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By 55blacktie - 3 Years Ago
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I just put Go Fast Math's HP calculator to the test by using Ted's numbers for his Stock Iron Heads Can Make Over 1 HP/Cubic Inch engine. Ted's engine made 315 HP @ 5800 rpm. However, Go Fast Math's HP calculator said that the same engine will peak at 256 HP @ 4084 rpm. All Go Fast's calculator requires are type of intake manifold (stock dual plane), Dynamic compression Ratio (7.99) Camshaft Intake Duration @ .050 (228) Displacement, and Number of Cylinders, and Peak Intake Flow (I used 175 cfm for stock, non-ported G heads based on a cylinder head comparison test and ford-y-block.com) Obviously, a lot is being left on the table. I'm sure everyone agrees that Ted's dyno numbers are the more reliable of the two.
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By 55blacktie - 3 Years Ago
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It is interesting to point out that Ted's engine made 250.4 HP (not peak) at 4,100 rpm, and the 1957 D Code 312 was rated 245 HP @ 4,400 rpm.
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