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post #1 of 10 (permalink) Old 02-12-2012, 09:28 AM Thread Starter
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exhaust question

What would be the disadvantage of running totally separate exhaust pipes. Would there be significant power loss? Thanks or the input.
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post #2 of 10 (permalink) Old 02-12-2012, 12:42 PM
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Hey Squid,
Your gonna have to be more specific, on what your questioning.. Being that the Honda V-twins have separate exhaust cans.. And most of the aftermarkert slip-ons are separated cans..
Unless you have a 2-into-1 exhaust on your bike.. Specify

Last edited by 1971allchaos; 02-12-2012 at 04:29 PM.
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post #3 of 10 (permalink) Old 02-12-2012, 02:54 PM
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i think what he is referring to is literally 2 seperate pipes from the engine block to the cans, with the pipes never intersecting with each other. The HRC works exhaust, TSR full system, and the Ethos Design system all have a sort of crossover where both pipesope into each other. I honestly do not know what the advantage or disadvantages would be, but a lot of it is going to depend on the rest of the exhaust design. if it is just straight pipe without any type of diameter increas towards the cans.....your not going to have any gain. its kind of pointless.

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post #4 of 10 (permalink) Old 02-12-2012, 04:24 PM Thread Starter
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Well the plan was to leave the right side a low mount and run the rear up inside the tail section to give it that moto gp look. I don't want to come back up from the split in the header because I'm afraid the pipe will build too much back pressure and also look bad.
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post #5 of 10 (permalink) Old 02-12-2012, 04:31 PM
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Originally Posted by gts455 View Post
i think what he is referring to is literally 2 seperate pipes from the engine block to the cans, with the pipes never intersecting with each other. The HRC works exhaust, TSR full system, and the Ethos Design system all have a sort of crossover where both pipesope into each other. I honestly do not know what the advantage or disadvantages would be, but a lot of it is going to depend on the rest of the exhaust design. if it is just straight pipe without any type of diameter increas towards the cans.....your not going to have any gain. its kind of pointless.
I could understand this, The Akrapovic Full system on the S-hawk -never intersect- Yet the system has a pressure balance tube...
The straight pipe theory, would only be of use on the top of the RPM range

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post #6 of 10 (permalink) Old 02-12-2012, 06:16 PM
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Originally Posted by squidbilly View Post
Well the plan was to leave the right side a low mount and run the rear up inside the tail section to give it that moto gp look. I don't want to come back up from the split in the header because I'm afraid the pipe will build too much back pressure and also look bad.
ok, thats what i thought you were going for. i don't think you'll build too much back pressure by running it down and back up, in fact i would think you may have too little by just running it straight up. If you use the Works exhaust as an example, the cans sit REALLY high, almost equal to the subframe. I think you should use that as a guide and instead of running the left side offf to the side, divert it an inch or two high and to the right and it will be where you want it. Here are a few pics of the works exhaust. Honestly if you just turn the one can sideways and tuck it up maybe an inch you'll be well into the rear cowl. and the left side pipe work is almost already routed like that.Click image for larger version

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post #7 of 10 (permalink) Old 02-12-2012, 06:37 PM
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Originally Posted by squidbilly View Post
What would be the disadvantage of running totally separate exhaust pipes. Would there be significant power loss? Thanks or the input.
The purpose of having a joined section of exhaust is to improve mid-range torque. You lose mid-range by having separate exhaust pipes.
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post #8 of 10 (permalink) Old 02-12-2012, 09:28 PM Thread Starter
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Thanks everyone. Really appreciate the pictures.
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post #9 of 10 (permalink) Old 02-12-2012, 09:32 PM
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No problem, hope it helps.

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post #10 of 10 (permalink) Old 02-12-2012, 11:29 PM
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That is amazing gts455! Great pictures!
The cross-over, x-pipe, h-pipe- whatever you want to call it has been around for a few decades now. I think it just one of those tried and true go-to's for any V engine. Car or motorcycle.

John, 2000 RC51 #000100

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