Why would that arrangement result in a severe vibration?Ī flat plane V8 has the same impulse-generated vibration frequency as a 4-cylinder, but with basically twice the amplitude. “In theory, the ultimate solution to the V8 firing-order conundrum is the flat-plane crank (aka, a “180-degree crank”). Why would that arrangement result in a severe vibration? Hot Rod Network – 19 Dec 17 But flat-plane cranks cause such severe vibration they can only be used on a pure race car”. Essentially, this makes the V8 act like two four-cylinder engines, allowing the optimized collector arrangement of a four-cylinder engine without the need to cross tubes. “ In theory, the ultimate solution to the V8 firing-order conundrum is the flat-plane crank (aka, a “180-degree crank”). Are they trying to say that every 180 degrees a single cylinder fires? If so, wouldn’t that only apply to 4 cylinder engines?Īlso having a problem understanding the last paragraph. On a four cylinder engine one would fire every 180 degrees. How could each cylinder fire every 180 degrees of crankshaft rotation? They all fire every 720 degrees, right? So on an 8 cylinder engine one would fire every 90 degrees. What is the meaning of the term " exhaust scavenging"? Why would that promote exhaust scavenging? “ To achieve optimum exhaust scavenging on a four-stroke V8 engine, each cylinder should fire every 180 degrees of engine rotation” First problem, I don’t understand the first sentence.
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