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r_towle |
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Custom Member ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 24,598 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States ![]() ![]() |
so, I have been thinking (not always a good thing)
If an engine is basically an air pump, and the objective is to make it as close to 100 percent efficient, why is the exhaust valve so much smaller than the intake valve? Forget emmisions, forget fuel delivery, just want to understand why this is so...it is so on most engines... Rich |
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Jake Raby |
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Engine Surgeon ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States ![]() |
Rich,
The summary I made was very general... With some things like this I fully understand them, but lack the ability to put them into words. Remember that bigger valves are heavier and actually "Get in the way" at certain valve lifts, especially @ full lift.... From what we have seen big huge valves are a certain way to kil the TIV powerband and power output. It's ALL in the combo! Buy a flowbench and dyno and you'll see that daily. |
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