bit of confusion on exhausts

[green536@hotmail.com (Chris DeLong)]

Ok well i didtn take the time to look at the links. Shoot me. anyway from my 
experience this is what I have found in mufflers that last a long time

1. Remus, low growl, long life, very heavy, very expensive
2. Borla, a little louder but still pretty nice, not so expensive as the 
Remus and alot lighter
3. Flowmaster, very loud, ricey sounding, cheap, will last a long time, 
lighter than the above mentioned mufflers



Chris DeLong
ICQ#45030867
Seattle, WA USA
'80 16V 'Rocco ragtop
'91 GLi 2.0 16V
'77 Rabbit 16V
'80 'Vert (parting out!)
'61 17 Window type II
'91 Vanagon
'78 Rabbit
'84 Jetta





>From: Dan Smith <sad_rocc@veedub.com>
>Reply-To: sad_rocc@veedub.com
>To: scirocco-l@scirocco.org
>Subject: RE: bit of confusion on exhausts
>Date: Tue, 26 Nov 2002 12:29:18 -0800 (PST)
>
>Well, I don't know why I didn't think of this before, but does anyone have 
>good aftermarket muffler reccommendations? I'm looking for something along 
>the lines of low purr/growl as opposed to high, annoying buzz. I have some 
>Audi muffler on now and it doesn't sound like much at low rpms but when I 
>step on it and get into the higher rpms its got a really nice, deeper hum. 
>Here is what I'm looking at for mufflers. I'm going more for looks and 
>sound than performance.
>1. 
>http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33636&item=1873521173&rd=1
>2. 
>http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=6771&item=1873503132&rd=1
>3. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1873400152
>
>I prefer 2 and 3 because I know how the exhaust travels in them and I know 
>what's inside, where as #1 could be stuffed with cotton for all I know. 
>Also, 2 and 3 are straight through. 2 has the typical canisters on rice 
>cars which makes me leery of the fartcan sound but 3 is a bit expensive.
>
>Dan
>--- "Joe Doty" <rocco2nr@hotmail.com> wrote:
> >I totally agree on the backpressure being a myth thing.  I think it's a
> >word made up by people who don't know what the hell is going on.
> >
> >I don't think you have to worry about losing low end, if that's what
> >you're stressing.  However I would recommend getting at least one
> >resonator to avoid the fart can sound....its tough to make a free
> >flowing 4 cyl exhaust sound good.
> >
> >Joe Doty
> >IT/Development
> >joe@lcnetwork.com
> >
> >-----Original Message-----
> >From: Dan Smith [mailto:sad_rocc@veedub.com]
> >Sent: Tuesday, November 26, 2002 11:40 AM
> >To: Ryan H; scirocco-l@scirocco.org
> >Subject: Re: bit of confusion on exhausts
> >
> >Well, that makes sense. For more info, the TT exhaust is 2.25", the
> >muffler is 2.5" inlet, dual 3" outlets. (God I hope it doesn't sound
> >like a fartcan) It seems velocity would be the same as in a stock setup,
> >as the sizes aren't changing, just the restrictions, or lack of. Am I
> >correct? And do others agree that backpressure is a myth?
> >
> >Dan
> >
> >--- Ryan H <rhock99@epix.net> wrote:
> >>I can't answer your question about your exhaust, but I can offer my
> >knowledge on back pressure...
> >>This is a big myth... from what I have read, you don't want ANY
> >backpressure, you want exhaust gas velocity.  The reason people think
> >you need backpressure is simple: If your engine only generates 250 cfm
> >of exhaust gases, and you have a 3.5" exhaust, the exhaust has so much
> >room when it makes it to your 3.5 inch pipe, that it has no need to move
> >further down the pipe, and it creates a sort of wall.  This causes
> >exhaust gas velocities to slow, and interferes with the ability of the
> >exhaust system to "scavenge" exhaust gases from the engine when the
> >exhaust valves are open.  This means the engine has to force exhaust
> >gases out the valves, instead of it being sucked out by the exhaust
> >system, and this is where systems with "too little backpressure" (in
> >truth, exhaust gas velocity) lose their power.
> >>I guess it would take some experimentation on your part to see what
> >allows your car the maximum exhaust flow rate.
> >>
> >>>
> >>> From: Dan Smith <sad_rocc@veedub.com>
> >>> Date: 2002/11/26 Tue PM 01:59:12 EST
> >>> To: scirocco-l@scirocco.org
> >>> Subject: bit of confusion on exhausts
> >>>
> >>> I have a stock 1.8l 16v, which hopefully at some point will change.
> >I've been looking into an aluminized TT setup with no resonator and
> >swapping the muffler for a fireball dual tip straight-thru design. I've
> >heard though that you want some backpressure and if your exhaust is too
> >free flowing, then you actually lose power. What exactly is the real
> >deal on this? And would this setup be too free flowing? Suggestions,
> >comments, ect.
> >>>
> >>> Dan
> >>>
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> >>
> >>
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