Single Side Exhaust

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Old 08-30-2005, 07:35 AM
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Single Side Exhaust

I took some shots at Mid-Ohio Grand Am that show it is possible to do a single-side exhaust for some performance. Both Kensai and Stewart teams are using it in their race platform.

https://acurazine.com/forums/showthread.php?t=25098
Old 08-30-2005, 02:30 PM
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My next planned project is a custom mandrel bent single outlet exhaust with 2.25" piping.
Old 08-30-2005, 03:31 PM
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Originally Posted by drkangel348

My next planned project is a custom mandrel bent single outlet exhaust with 2.25" piping.
2.25" is too small IMO...
Old 08-30-2005, 04:01 PM
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Single exhaust is the way to go. Duals make no sense on engines without two cylinder banks, and only then when they are completely independent all the way back. If I could figure out how to do it without leaving a big hole where one of the tailpipes comes out, I'd have done it already.
Old 08-30-2005, 04:10 PM
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Originally Posted by Stein357
2.25" is too small IMO...
Well I'm debating between 2.25 or 2.5.
Old 08-30-2005, 04:22 PM
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Ins't there someone on this forum that has a European Accord with the single exhaust model......i think it was red......had the rear factory lip with the left sied exhaust opening closed off.......anyways....sweet cars......good pics......One day I will have the 5zigen exhaust
Old 08-30-2005, 04:32 PM
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Originally Posted by ILoveMyHonda
Ins't there someone on this forum that has a European Accord with the single exhaust model......i think it was red......had the rear factory lip with the left sied exhaust opening closed off.......anyways....sweet cars......good pics......One day I will have the 5zigen exhaust
ya, i think it was someone from belguim? can't remember the exact location...
Old 08-30-2005, 09:19 PM
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There's actually 3 single exhausts out..... that i know of... Spoon has one, 5 Zigen has one and J's Racing just came out with one!! Great sounding one too!!

BUt, i felt it's weird that the rear has an empty hole, unless Honda Japan has something to close it off.....hahha!

and, what's the difference between single vs. double?? Is it single has more high rpm power and double has more torque at low rpm?
Old 08-31-2005, 12:53 AM
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A single exhaust system doesn't use a Y pipe near the rear axle like most TSX catbacks have. There is less turbulence, and the exhaust system can be free-flowing throughout. This is ideal with a four cylinder engine.

Dual exhausts are beneficial on engines with two cylinder banks. For example, with a true dual exhaust on a 350cid V8, two entirely seperate, complete exhaust tracts treat the V8 like a pair of 175cid I4s. It is much easier to pipe it for maximum flow this way, and to match it to the engine's own flow characteristics.

Y pipes, be them splitting or combining, cause backpressure.
Old 08-31-2005, 02:04 PM
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Originally Posted by Benz_05_TSX
There's actually 3 single exhausts out..... that i know of... Spoon has one, 5 Zigen has one and J's Racing just came out with one!! Great sounding one too!!

BUt, i felt it's weird that the rear has an empty hole, unless Honda Japan has something to close it off.....hahha!

and, what's the difference between single vs. double?? Is it single has more high rpm power and double has more torque at low rpm?

Spoon has a single exhaust setup?? I thought they only had N1 muffler kit? Do you have a link for the single, sounds rather tempting.
Old 08-31-2005, 03:12 PM
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Originally Posted by rmpage
A single exhaust system doesn't use a Y pipe near the rear axle like most TSX catbacks have. There is less turbulence, and the exhaust system can be free-flowing throughout. This is ideal with a four cylinder engine.

Dual exhausts are beneficial on engines with two cylinder banks. For example, with a true dual exhaust on a 350cid V8, two entirely seperate, complete exhaust tracts treat the V8 like a pair of 175cid I4s. It is much easier to pipe it for maximum flow this way, and to match it to the engine's own flow characteristics.

Y pipes, be them splitting or combining, cause backpressure.
True, though as I understand it, on the TSX, the dual system is more used to quell sound and reduce the amount of exhaust noise.
Old 09-01-2005, 03:39 PM
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Single side exhausts can also be slightly lighter, which is also a benefit
Old 09-06-2005, 09:53 PM
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Originally Posted by drkangel348

My next planned project is a custom mandrel bent single outlet exhaust with 2.25" piping.
Stick with the 2.25 if you're car is normally aspirated. 2.5 probably won't scavenge well enough and you could very well see a performance drop. Too big.
Old 09-07-2005, 12:12 AM
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yea i remember that red accord in belgium...

i'd go single exhaust if i could get that "hole cover".

i wonder if one of the traders on this forum (like mr. heeltoe) could source the part from honda. That'd be very cool
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