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why dual exhaust on 4cyl is useless..

 
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Old 30 Dec 2003, 02:58 am
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Default why dual exhaust on 4cyl is useless..

http://home.comcast.net/~CWlc21/bruins013.wmv

notice the exhaust all exiting out the path of least restriction....

p.s its srt-4 related...
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Old 30 Dec 2003, 03:26 am
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it's not just SRT-4 related, any 4 cyl. won't get any benefit out of going with a dual exhaust setup. Our exhaust manifold typically exits into a joint collector such as headers. In order for the dual exhaust to actually serve it's purpose the 4 would have to be grouped into 2 seperate collectors...hence V8's having dual exhaust.

To equal out the flow on a 4 cyl. (even 8cyl. use these), a H-pipe or X-pipe is used...i believe a lot of stangs use them. By simply using a Y-pipe to split the single into dual there is no real performance gain. The SRT-4 has duals simply for the look, and IMHO it does look good.
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Old 30 Dec 2003, 05:39 am
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I figure those that do it, do it for the retro look. It does look cool, but it is definitely a V8 thing to get added hp and torque. I'm more performance minded so my '01 had a single exhaust with a axleback Dynomax muffler. My GT is a single with a axleback BTG flow through exhaust. In the near future I'm going to a 2 1/2" catback exhaust with either a resonator or maybe even a straight pipe in preparation for the Stage 2 upgrade.
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Old 30 Dec 2003, 05:53 am
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My(Scottsdale)dual exhaust uses a Y pipe for splitting the exhaust and it steams out of both pipes in winter. That shot of the SRT-4 shows a T-pipe connection that does not lend itself to even exhaust distribution between the 2 tailpipes. All of the functional sidepipe kits also use Y pipes to channel exhaust to both sides of the car and are very effective at it. I know that duals (Dual tailpipes)dont help performance, but it doesn't hurt either, and I love the look.
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Old 30 Dec 2003, 08:18 am
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Quote:
quote:Originally posted by Gear_Head

My(Scottsdale)dual exhaust uses a Y pipe for splitting the exhaust and it steams out of both pipes in winter. That shot of the SRT-4 shows a T-pipe connection that does not lend itself to even exhaust distribution between the 2 tailpipes. All of the functional sidepipe kits also use Y pipes to channel exhaust to both sides of the car and are very effective at it. I know that duals (Dual tailpipes)dont help performance, but it doesn't hurt either, and I love the look.
100% correct. BTG also has the "Y" pipe. We all know it's for the looks, but better if both pipes work.[|)]
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Old 30 Dec 2003, 08:29 am
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They do look good though!
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Old 30 Dec 2003, 08:42 am
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OMG. You broke one of the PT commandments. Never flame dual exhausts.

A dual exhaust is not a dual exhaust unless it comes with 2 cats in my opinion.
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Old 30 Dec 2003, 09:42 am
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Is it single or duel,

"Only my exhaust man knows for sure"
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Old 30 Dec 2003, 10:02 am
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My 400 horsepower blown T-Bird had single exhaust (V8)
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Old 30 Dec 2003, 10:07 am
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I checked my BTG exhaust, and they both seem to distribute equel amounts of fumes from the back. PLUS THEY SOUND AWESOME.
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