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Join Date: Jan 2001
Posts: 696
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Dansk vs. stock muffler - which really flows more cfm?
Anybody actually test the volumetric efficiency between Dansk (one in-one out) and a stock Carrera muffler? Reason I ask is I have both and It seems the motor runs better esp. top end with the stock muffler. Could it be the Dansk is really corked-up compaired to stock?
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02-26-2006, 07:03 PM
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Don't know but an experienced p-car mechanic told me that the factory muffler flows pretty well.
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Don 24 Cayman GTS - GT Silver 23 Cayman GTS - Arctic Grey - Sold 97 993 Coupe - Arctic/Black - Sold 13 991 Coupe - Platinum/Black - Sold, 87 911 Coupe - Venetian Blue |
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02-26-2006, 07:30 PM
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I think that you might need to broaden your question a little bit beyond just "volumetric efficiency".
Here's a couple of threads where I did posted some "research" (such as it is) about 911 exhaust design and tuning. Here's another one in a related vein.
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John '69 911E "It's a poor craftsman who blames their tools" -- Unknown "Any suspension -- no matter how poorly designed -- can be made to work reasonably well if you just stop it from moving." -- Colin Chapman |
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02-27-2006, 05:31 AM
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I guess the aftermarket performance muffler market doesn't get it. At least a few post their ratings in CFM for comparison. (I assumming that's at STP, and some sort of testing per ASTM). Has anyone done a comparison between the Dansk and stock Carrera muffler for flow efficiency?
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02-27-2006, 08:39 AM
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1987 Porsche 911 3.2
2013 991 Carrera
1969 Porsche 911E 2.0 E
