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Unread 01-12-2015, 11:23 AM   #31
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Default clone exhaust

Id say it cut the exhaust noise by about 30. The 2 customers that had it installed were happy with the change. Ive never got around to trying it but I think a spray on bed liner would reduce a lot of the cab noise.
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Unread 01-20-2015, 06:59 PM   #32
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Default Re: clone exhaust

If you can find the foil lined stick-on stuff for roofing membrane, or second best vinyl lined, at a home improvement store.....it works pretty well on panels to lower noise and reflections. Just don't put it next to the exhaust without a heat shield.
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Unread 02-05-2015, 07:24 AM   #33
VC 460 CLONE GONE WILD
 
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Default Re: clone exhaust

I could not find any more hushpowers 7500,7501,nor 7502 which all looked similar but I did find the hushpower 7200 on ebay.I hope this helps anyone quieting a clone.
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Unread 02-13-2015, 12:12 AM   #34
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Default Re: clone exhaust

Update. The Flowmaster mounting in its current state keeps breaking the welds on the inlet. I know it's too much vibration causing it. Muffler is mounted to axle. I got a flexible exhaust coupling, and I'm going to see if adding this will help.

http://www.amazon.com/gp/product/B0031HUFTK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 http://www.amazon.com/gp/product/B0031HUFTK/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
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Unread 02-13-2015, 04:03 PM   #35
VC 460 CLONE GONE WILD
 
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Default Re: clone exhaust

Sorry to hear that. I was wondering how it was working for you.Have not had mine out pass the 8 hr report.BRRRRRR Very cold here and I am a candy adz.
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Unread 02-13-2015, 04:55 PM   #36
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Default Re: clone exhaust

Quote:
Originally Posted by M16er View Post
Update. The Flowmaster mounting in its current state keeps breaking the welds on the inlet. I know it's too much vibration causing it. Muffler is mounted to axle. I got a flexible exhaust coupling, and I'm going to see if adding this will help.

http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

Is this a good idea?
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Unread 02-14-2015, 09:05 AM   #37
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Default Re: clone exhaust

I used a section of flex pipe, not the same, but it worked well. The stuff I got was stainless, at local Autozone store. It was 1.5" so I needed an adapter. It had a tiny leak at the adapter, but not enough to hear. I ran that into an atv muffler. Sounded really good, nice and quiet. Quiet enough that I could hear the ticky tick tick of the valvetrain. It also solved the backfiring.

I don't see any reason a section of flex wouldn't work well. You might also consider another support somewhere. I had one running from in front of the axle to the middle of the pipe. I just took a piece of 1" flat stock and bent the ends to match the angle of the mounting surfaces. The bottom was bolted to an existing bolt on the swing arm frame, the top was secured to the pipe with a stainless worm gear clamp (radiator style). Worked really well. Never cracked any pipes/flanges after that. Also the flange bolts never came loose again after that. Took all the vibration out.
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Unread 02-14-2015, 08:09 PM   #38
VC 460 CLONE GONE WILD
 
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Default Re: clone exhaust

I see the new V.C. header has a bracket from engine block to header.My bugger welder can't do stainless so I will add your method to my warmer weather to do list.
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Unread 02-15-2015, 10:04 AM   #39
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Default Re: clone exhaust

Update: I got the inline flex coupling idea from Father-In-Law. He got a small travel trailer and mounted an Onan genset on the front. He made an exhaust pipe extension that moved it away. Prob was vibration resonated bad. So, I got that one in the link. Problem with it is it is TOO rigid. So, we went and looked at a junked a/c unit (He's been in a/c business for many years) and found a similar flex coupler/damper like he used on his. Diameters were close, although the Damper was a wee bit smaller. This is similar to the SS flex coupler I got in construction, except solid copper. We used two pieces of scrap exhaust pipe to braze to damper.

Sorry guys and gals, no pics of this mod, wife took truck and phone was in it.

First we looked to see where the damper would work. Damper was about 12" long. Wanted to keep it as straight as possible so the flex absorbing be maxed out. Decided the straight part after the exhaust curve would be it. Removed exhaust bolts and found the muffler wanted to drop about an inch to rest solid on its mounts. Removed exhaust pipe with broke inlet and started on muffler first.

The muffler was mounted using longer bolts on the rear axle housing. Axle housing movement is in line with engine and cradle other than small amounts of torque you'd get from engine. Took note of how we needed to add some more bracing. Removed muffler and added more bracing. Cut exhaust pipe in 4 pre marked pieces and rewelded inlet back onto muffler with a piece of angle iron cut so it would mount better to muffler and inlet, more strength. Reinstalled muffler and tack welded damper. Then tacked second piece to curved pipe, then third piece and then to exhaust flange. Removed whole assy and set it on bench to weld up solid. Cooled down and set it back in and started it up. Damper doing as it should. No movement noticed on muffler. Ran it down into woods and back up. Hoping this works.
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Unread 02-15-2015, 02:21 PM   #40
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Default Re: clone exhaust

Is this still the 7501? Is it still quiet?
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