Another Exhaust Question

glewis29 said:

The general word around here is that performance will get worse for a naturally aspirated V6 if you go to a dual exhaust, especially in the low end range. Basically the engine doesn't push enough air to take advantage of the increased volume and it ends up hurting performance.

I google'd 'exhaust scavenging volume' and found the following link http://www.bigcitythunder.com/pages/understanding_exhaust.pdf. It looks (I only briefly scanned it) like a pretty good read for some better understanding of what your exhaust can do for you.

Hope that helps

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It is true that some engines are mechanically tuned to "X" amount of backpressure and can show a loss of low-end torque when that backpressure is reduced. It is also true that the same engine that lost low-end torque with reduced back-pressure can be mechanically re-tuned to show an increase of low-end torque with the same reduction of back-pressure.

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More importantly, maximum mid-to-high RPM power will be achieved with the lowest possible backpressure. Period!

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Assuming that an exhaust system is otherwise properly designed, equal length pipes offer some benefits that are not present with unequal length pipes. These benefits are smoother engine operation, tuning simplicity and increased low-to-mid range torque.

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