Originally Posted by jlude90
how are they different?
if your exhaust gas is going out faster then the engine is putting it out, there would be negative pressure on the system, and no backpressure right?
Well, backpressure is just that, pressure in the exhaust system. Velocity is just that, velocity. Run a pipe too big and you'll lose exhaust velocity.
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“Equality, rightly understood as our founding fathers understood it, leads to liberty and to the emancipation of creative differences; wrongly understood, as it has been so tragically in our time, it leads first to conformity and then to despotism”-Barry Goldwater