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#1
06-19-2002, 10:05 PM
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Muffler Tech - Why is the oulet nipple smaller than the inlet nipple?
The mufflers I bought are 3" i.d. inlet, and 2 1/4" o.d. out, or something like that. In any case, the outlet is significantly smaller diameter than inlet. Why do they make them this way? Why not make the outlet nipple same diameter as inlet? Just curious. Right now, I have my driver side exhaust terminating at the end of the muffler. it dumps into the driver rear wheel well. passenger side is plumbed all the way to the rear of the passenger rear tire. I just haven't gotten around to splicing on the end of the driver side exhaust to run it behind the tire.
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Patrick Decker Hooper The SSII Registry and Gallery The Hooper Truck Stripling Warrior 4x4 IHC Webring 
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#3
06-19-2002, 10:21 PM
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It is one of the cheapest ways to produce a "muffling" effect in the manufacture of mufflers. Unfortunately, it also robs you of horsepower.
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Jim L.
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#4
06-21-2002, 05:21 AM
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In addition to what BG says, another part of the theory is that the exhaust gases cool and become more dense. By decreasing the outlet size in relation to the inlet, the gases are travelling at a higher speed.
The larger inlet also allows the crossover to be somewhat more effective. JMHO, YMMV
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Every child comes with the promise that God has not yet despaired of man.
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#6
06-22-2002, 08:42 PM
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Quote:
For a given volume, temp is inversly related to pressure, or to put it in chemists ASCIese; P1*V1/T1=P2*V2/T2 Where P=pressure, V=volume and T=temp. D.
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"Things and people are not what we wish them to be nor what they seem to be. They are what they are..." Epictetus "Remember, People are more violently opposed to fur than leather because it's safer to harass rich women than motorcycle gangs." Unknown Author
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#7
06-24-2002, 01:03 PM
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Wrong way
Quote:
 I figured it might be in part because of cooling, decrease in volume, also for the muffling effect as was stated.. but it still seems screwy to me. *Most* of the mufflers I looked at in the catalogues seemed to be larger in than out....
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Patrick Decker Hooper The SSII Registry and Gallery The Hooper Truck Stripling Warrior 4x4 IHC Webring
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#9
06-25-2002, 09:33 AM
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Arrows
Quote:
__________________
Patrick Decker Hooper The SSII Registry and Gallery The Hooper Truck Stripling Warrior 4x4 IHC Webring
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#10
06-25-2002, 09:50 AM
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Re: Arrows
Quote:
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Ryan '78 SII et al
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