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Old 09-11-2012, 05:23 PM
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Choctaw Bob Choctaw Bob is offline
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That used to be true in the old days when to make horse power you had to wind them up. Since an engine is an air pump the way to make power is to pump more air. With the advent of modern head air flow technology and hydraulic roller cams everything changed. A roller cam opens the valves quicker and obtains higher lifts than is possible with a flat tappet cam. Thus, the air pump achieves the same air flow at a much lower RPM than before. The famous Chevrolet 350 HP 350 cam had 290 degrees duration and .460 lift. This is a very streetable cam for a factory muscle car and needed to be wound over 6500 RPM. to make full power. My 350 Howard hydraulic roller has 288 degrees and 530 lift and makes over 500 HP @ 5500.

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Originally Posted by spinn View Post
The drag strips are fun, but a race car and road car are different. A built machine screaming at 7000rpm is not going be fine in traffic. In town a 5500rpm machine will be more fun. Case being when are you going to wind up 7k rpm going to work to get that peaky power. It is time and place. Work or play.

Yeah the built woman look good in the beginning, then gravity pulls it down. Then there is the charge bill they have no idea how to budget. What is a outfit good for if you can only wear it once.
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