Exhaust Pressure an Temperature Differential - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 8 (permalink) Old 08-20-2011, 01:28 PM Thread Starter
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Exhaust Pressure an Temperature Differential

Hi new owner just got the bik. I noticed a difference in both exhaust temperature and pressure from the two pipes. I am running the Sato Low Mounts. I am using an IR gun to look at this but with out it its noticeable which is why I got the IR gun out in the first place.

as sitting on the bike the right has more pressure and is hotter. I looked at the split and the temps were with 30 degrees which is fine. I cant explain why i might see a difference AFTER the split. I don't think this is indicative of cylinder temperature delta but more of the pipe.

So I am wondering do you guys see the same thing or are the real even WRT temp and pressure?

I just passed emissions for what thats worth yesterday.


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post #2 of 8 (permalink) Old 08-20-2011, 09:54 PM
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This is common.
The right side has a straighter path than the left side.
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post #3 of 8 (permalink) Old 08-20-2011, 10:39 PM Thread Starter
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I thought that might be the case thanks for confirming this. Seems like that can rob the system for peak performance to me. are there any known mods fixes cures or improvements?

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post #4 of 8 (permalink) Old 08-21-2011, 02:49 AM
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If you want to save weight and give up on your very top end you can switch to 2:1 pipe, otherwise it is the nature of the V2 beast.

If you like playing around cut a 6" piece of a moped inner tube and place it on the tip of the right muffler and zip/hose clamp it and see how it affects flow and sound.

People use to pass sound checks on races with those things on, don't laygh!
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post #5 of 8 (permalink) Old 08-21-2011, 02:27 PM Thread Starter
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I like the sound just fine! Just was wondering if all the bikes are like this (sounds like it is) and if there was a mod to balance it (does not sound like there is). So no big deal. I need to get a new battery before I do anything else.
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post #6 of 8 (permalink) Old 08-21-2011, 04:09 PM
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I thought that might be the case thanks for confirming this. Seems like that can rob the system for peak performance to me. are there any known mods fixes cures or improvements?
My Akrapovic full system didn't have this symptom.
What they did was allow a section of the rear mid-pipe to intrude slightly into the right mid-pipe section and act as a diverter to send a portion of the gas flow over to the left side.
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post #7 of 8 (permalink) Old 09-08-2011, 02:37 PM Thread Starter
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Funny I have to confirm this but it looks like the Low Mount Sato Inner Diameter of the muffler is not the same. It looks like the ID on the right is larger than on the left. I will look at my stock exaust and compare.

2004 RC51 Nicky Hayden, PCMIII, Sato-Low Mount
1994 FZR600, KTMSXC625 Thumper, Honda Metro, 150cc Puma
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post #8 of 8 (permalink) Old 09-08-2011, 03:34 PM
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Funny I have to confirm this but it looks like the Low Mount Sato Inner Diameter of the muffler is not the same. It looks like the ID on the right is larger than on the left. I will look at my stock exaust and compare.
I've heard that as well. I couldn't confirm it as I don't have a Sato exhaust.
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