cosmos Posted October 31, 2004 Share Posted October 31, 2004 Well I was flipping through the Legacy brochure today and noticed the GT doesn't hae a true dual exhaust. I don't know much about exhaust. I was wondering if there would be any benifit of converting to dual exhaust? Would this be cost benifital at all? Also a sort of side question... what is the benifit of going catback dual? Link to comment Share on other sites More sharing options...
chucktoo Posted October 31, 2004 Share Posted October 31, 2004 The is a single string of 3 cats and a resonator after that it Ys to dual mufflers. If you run only 1 cat [ down pipe ] and 3 in piping to the Y then there should be very little advantage in doubling everything up which would be very hard to do . Link to comment Share on other sites More sharing options...
rao Posted November 1, 2004 Share Posted November 1, 2004 You can't 1 turbo = single exhaust. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
chucktoo Posted November 1, 2004 Share Posted November 1, 2004 You could but it would be very very expensive and not worth it. STIs with 1 turbo and 1 exhausrt system make over 350 whp that is more than enough for me. Link to comment Share on other sites More sharing options...
jdmpartstx Posted November 3, 2004 Share Posted November 3, 2004 [quote name='chucktoo']You could...[/QUOTE] Only if you run twin-turbos. Link to comment Share on other sites More sharing options...
chucktoo Posted November 3, 2004 Share Posted November 3, 2004 While you are at it lets start with an H-6 3.0 l. Link to comment Share on other sites More sharing options...
Xenonk Posted November 4, 2004 Share Posted November 4, 2004 ah, you all forgot or dont know about the GT-B guys.. it's a twin turbo 2.0 Legacy guys.. any case, do you really want to carry anymore weight than what the car already has? You wont have the gains of going to a true dual exhuast because it's just one turbo. It also wouldnt make much sense for a NA 2.5i either, you need some back pressure to help keep the gases in the cylinder a bit longer for a good compression. Keefe Keefe Link to comment Share on other sites More sharing options...
Drift Monkey Posted November 4, 2004 Share Posted November 4, 2004 Incorrect Keefe. All and any backpressure is bad, but sometimes cannot be offset due to the decrease in exhaust gas velocity caused with increase overall exhaust diameter. DM can't stress exhaust gas theroy enough. Link to comment Share on other sites More sharing options...
Xenonk Posted November 4, 2004 Share Posted November 4, 2004 okie dokie DM, corrected. But explain why it's not a good idea to go with larger exhaust piping on a NA car as opposed to a turbo car can. Keefe Keefe Link to comment Share on other sites More sharing options...
Drift Monkey Posted November 5, 2004 Share Posted November 5, 2004 [quote name='Xenonk']okie dokie DM, corrected. But explain why it's not a good idea to go with larger exhaust piping on a NA car as opposed to a turbo car can. Keefe[/QUOTE] As I said...exhaust gas velocity is slowed. You always want to keep exhaust gas velocity as high as possible...but sometimes backpressure is inevitable while trying to accomplish this (such as in a NA application). DM has said it and will say it again. Everyone must read this: [url]http://www.cobbtuning.com/tech/exhaustdesign/index.html[/url] Link to comment Share on other sites More sharing options...
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