general exhaust questions
Senior Member
Joined: Mar 2006
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Originally Posted by MudTerrain
Lets get some things straight.
You don't want backpressure! You want as little of it as possible. Less backpressure = more power
What you do want is high exhaust gas velocities. The smoother and faster flowing the exhaust (exhaust gas velocity), the more power you're going to make. You want an exhaust system with as little back pressure as possible and as high exhaust gas velocity as possible.
Lets do a comparison.
You're stock exhaust uses a single 2.5" (I'm not sure if that's correct, but for demonstration sake). Lets match that to a drinking straw. An aftermarket/custom exhaust uses a 4" single pipe. Lets match that to a piece of 4" PVC. Blow through the drinking straw at your hand and then through the 4" PVC at your hand. Which do feel more on your hand? You feel the air through the drinking straw more because of the higher velocities. Nothing to do with backpressure.
And nothing beats WOT hp/tq from open headers.
You don't want backpressure! You want as little of it as possible. Less backpressure = more power
What you do want is high exhaust gas velocities. The smoother and faster flowing the exhaust (exhaust gas velocity), the more power you're going to make. You want an exhaust system with as little back pressure as possible and as high exhaust gas velocity as possible.
Lets do a comparison.
You're stock exhaust uses a single 2.5" (I'm not sure if that's correct, but for demonstration sake). Lets match that to a drinking straw. An aftermarket/custom exhaust uses a 4" single pipe. Lets match that to a piece of 4" PVC. Blow through the drinking straw at your hand and then through the 4" PVC at your hand. Which do feel more on your hand? You feel the air through the drinking straw more because of the higher velocities. Nothing to do with backpressure.
And nothing beats WOT hp/tq from open headers.
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Senior Member
Joined: Oct 2006
Posts: 101
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From: stockbridge, GA
and that it did have a decent jump off the line, for an old *** piece of steel that is, of course me being as young as i was, i went through three sets of tires in one year.