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Do straight/short pipes burn out valves?

I am an ASE Certified Master machinist with 50 years' experience rebuilding cylinder heads. A much more likely cause for the valve burning problem is low seat pressure, worn guides, bad valve seals ...
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Does a carburetor have constant fuel mass flow, constant liquid volume flow, or constant molecule count flow?

It's not constant mass or constant volume, but more complicated - for an ideal free jet, mass flow is area * square root of (2 * density * pressure difference) - so a higher density increases the mass ...
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Does a carburetor have constant fuel mass flow, constant liquid volume flow, or constant molecule count flow?

Ideally a carburetor would pick up enough fuel by mass so that you end up with a near desired stoichiometric ratio of air to gas. E10 has a stoichiometric ratio of about 14.1:1. 14.1 kilograms of air ...
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Effect of same engine but with slightly less capacity (cc) and hp

A simple view: force = mass * acceleration horsepower = force * velocity Given the same car, if you decrease the horsepower by 3%, in general, especially if you are talking about speeds under the ...
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