Author Topic: CS-400 Muffler Mod  (Read 4414 times)

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Offline Moparmyway

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Re: CS-400 Muffler Mod
« Reply #10 on: December 07, 2013, 11:46:13 am »
No, IMHO, for now (untill you decide to port it) just MM the mufflers exit hole by enlarging it or making more holes for the exhaust to exit from

Offline farmboy

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Re: CS-400 Muffler Mod
« Reply #11 on: December 08, 2013, 07:35:53 am »
I'm with Steve!!  That's why I'm trying to get rid of the 290.  It's replacement will be a CS400 or a 500 or a 620 or a 680, or a 8000.  Echo saws are hard to beat in price or quality.  Much to my dismay I only have 2 Echo's CS600P's.  Would love some more Echo's.  It will happen.
Shep

Offline huichex

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Re: CS-400 Muffler Mod
« Reply #12 on: December 08, 2013, 11:10:32 am »
Alright boys, so this is what I have got so far. Please excuse the  rookie looking metal work. This thing was built a lot more sturdy than I had ever imagined... the final pic shows the front with no mounting holes, all I need to do now is locate those holes, and build a set of crush sleeves. Then a cool deflector and we are ready to play.

You can see where I tried to drill out the spot welds that I found, but the front of this thing wouldn't come apart so I lit up the old torch and it started listening.

Offline Philbert

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Re: CS-400 Muffler Mod
« Reply #13 on: December 08, 2013, 12:36:56 pm »
I am following this thread because I have a CS400.  Maybe, someday, interested in modifying it.

These photos look like a lot of work for a 'simple' muffler mod. Isn't there an easier way to go on this saw?

Thanks.

Philbert

Offline huichex

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Re: CS-400 Muffler Mod
« Reply #14 on: December 08, 2013, 04:12:53 pm »
It was more work than I had thought. But I threw every tool I could think of at it before I used the torch. Couldn't come up with a better way to get the front half of the catalitic off of the front half after splitting case.

Offline Philbert

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Re: CS-400 Muffler Mod
« Reply #15 on: December 08, 2013, 06:44:54 pm »
Now that you know what it looks like inside, could you have used a hole saw to drill out the cat, then made a cover without splitting the muffler case?

(I have never done a muffler mod, just basing this on threads I have seen).

Philbert

Offline huichex

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Re: CS-400 Muffler Mod
« Reply #16 on: December 08, 2013, 07:05:05 pm »
I dont think so. The cat is spot welded in 2 places at the back and it stretched from bolt hole to bolt hole at the front. I drilled out the spot welds I could see in the front but that didnt help. Maybe someone else can offer up their experience.

Offline huichex

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Re: CS-400 Muffler Mod
« Reply #17 on: December 10, 2013, 06:47:08 pm »
I was hoping someone would comment on whether or not here was an easier way to do this, or on the size of the outlet. I have been at work, so I haven't been able to do anything else to it.

Offline 660magnum

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Re: CS-400 Muffler Mod
« Reply #18 on: December 10, 2013, 08:08:07 pm »
The catalytic reactor adds complication to the situation that would not exist with the typical empty box muffler where it suffices to just add another outlet.
We should share what we know... someone may learn...
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Offline huichex

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Re: CS-400 Muffler Mod
« Reply #19 on: January 02, 2014, 03:48:11 pm »
OK, so it has been a while, but the muffler is done, and installed. I went to adjust the carb, but the H screw wont go left.... Is that expected? How do I remedie this? Also, does the L screw need any attention?
Thanks again.
Luis
I will post pix as soon as I can.

 

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