2008 cascadia. 515 Detroit. Eaton 13 auto.
If I go any higher with the horsepower would I need to upgrade to dual exhaust? I heard somewhere that you do but is that a urban legend?
what hp do you need dual exhaust?
Discussion in 'Freightliner Forum' started by dustinbrock, Jul 28, 2013.
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I ran a 515 for a while, went back to 435. I didn't experience any issues, but that's just me. It will be interesting to hear from others....
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A single larger diameter is often better then duels as it is about restriction.
One 6" pipe has 12,5% more area then two 4" pipes.
Then if you factor in the Y or T piece needed for duels as well as the extra bends and extra friction from more surface area you are way better off with a larger single.
What is very important is the muffler , this is where sometimes duel pipes have an advantage as you can use 2 mufflers.
A good free flow muffler is very important if you are concerned about this. -
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With duals all your power is coming straight out.
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I had heard that anything over 550 and you must dual exhaust... Detroit specs... Not sure though, I seen a Volvo 565 Cummins with a single stack.
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That not true. Cascadias come out the factory with 600hp and single exhaust sometimes.
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Ok. Thank you
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FWIW, I've tried a high flow muffler on my previous 01' S60 and now my MBE4000, neither time did it make a measurable difference in power or economy. Both times it made more noise and lightened my wallet.
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