maydog Posted February 17, 2005 Report Share Posted February 17, 2005 I have been doing some recreational reading about the engineering of the new corvette 7 liter. There have been several mentions of an actuated valve in the exhaust system. Some sites have said this is to increase backpressure and to improve low end torque and others have mentioned it is primarly for sound control. I do not understand how restriction and backpressure can help build power at any engine speed. I am not well versed in the whole pumping mechanics of an IC engine, but to me it seems that that back pressure would be fighting engine rotation, pushing down on the pistons trying to force the exhaust out. What is the deal, does backpressure actually help low end power (torque is just proportional)? Is this the reason it is on the corvette? Finally, if this is true why wouldn't this exhaust system benefit other cars (say a sts)? Link to comment Share on other sites More sharing options...
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