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New OS 140RX tuned pipe mounting

Old 11-16-2004, 04:46 PM
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Lancair-RCU
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Default New OS 140RX tuned pipe mounting

Hi, Im wanting to see pics of how anyone has mounted the new OS140RX tuned pipe.
OS have reviesd the pipe design, it now has a squared off end and now has two mounting lugs at the rear of the pipe. It still has the same OS part name, as in T-6010 tuned pipe but a new part number according to my LHS. Ill take some pics of mine later on to show what Im talking about.
Old 11-16-2004, 05:14 PM
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Bob Pastorello
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Default RE: New OS 140RX tuned pipe mounting

I'm not sure I'd want to have that long lever arm acting on the coupler/header. Seems like it would sure add a lot of stress to the header. I wonder why they believe anchoring at the end won't break couplers/headers? (That's been my experience when trying a 'stinger mount' restraint).
Old 11-16-2004, 10:22 PM
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Lancair-RCU
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Default RE: New OS 140RX tuned pipe mounting

Just searching around for more info on the pipe mount and found on the following linked page http://www.radiosouthrc.com/closeup....d=245&offset=0
My pipe is EXACTLY the same dimensions and looks identical in every way to the Hatori #900 2C-140 Tuned pipe. Baffles etc everything looks identical, the hardware I recieved with it, everything to the picture there. Does that give anyone any clues to the mounting ?
Old 11-17-2004, 03:35 PM
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bla bla
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Default RE: New OS 140RX tuned pipe mounting

MK flexible header mount for Hatori header, if used.
Dave Brown flexi pipe mount used at the tail end of pipe.
If you're not using the 2 piece Hatori header and using say a Macs instead.... you'll just be needin' the DB pipe mount.
Pics and stuff from Central Hobbies.
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Old 11-17-2004, 04:07 PM
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TOYMAKER
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Default RE: New OS 140RX tuned pipe mounting

I agree with Bob. I have mounted mine at about the 5/8 point towards the back and with no support at the front using the D.B hush mount system. This seem to be the resonant point or balance in the setup. This is with a bolt on header and to date no broken headers.

This with an OS 1.40 and Karl Muller header.

Wayne G
Old 11-17-2004, 04:55 PM
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Scott Smith
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Default RE: New OS 140RX tuned pipe mounting

Here's my perferred method. If the pipe has the mounting tabs, extend them as necessary with another piece of sheet metal to reach the center of the silicone ring. As for mounting on the rear of the pipe, I would support the front as well as I did in this picture.
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Old 11-17-2004, 04:59 PM
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Bob Pastorello
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Default RE: New OS 140RX tuned pipe mounting

Scott - very cool "shock absorber" mounts. Another use of my coupler materials!!!! Great idea, thanks for sharing it!
Old 11-17-2004, 07:01 PM
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Default RE: New OS 140RX tuned pipe mounting

I agree that you need a front mount on the header, particularly if you stay with the twin O-ring header mount. I've used a new Prosser front mount that is rubber isolated. Works well with the Dave Brown type saddle 2/3 down the pipe.

Steve
Old 11-18-2004, 03:24 AM
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Lancair-RCU
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Default RE: New OS 140RX tuned pipe mounting

I'll have a look at what guys are using at this weekends comp.
Ive searched and can not find any reference to an MK flexible header mount for Hatori header. My header is indeed a two o-ring type, looks exactly the same as the Hatori ones pictured at the radiosouth site.
Old 11-19-2004, 03:09 AM
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PatternFlyer
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Default RE: New OS 140RX tuned pipe mounting

Lancair,

Are you talking about the Hatori 900 pipe that has flat end?
Here are the things that I found most Japanese are using.
First is the Hatori 900.
2nd, Go-model's header mount.
3rd, Go-model's 2-cycle pipe mount.

You can always use 1 or 2 of small silicone (tubings) couplers that Scott used. Very effective since the pipe has two mounting flanges.

Ihncheol Park
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Old 11-19-2004, 03:35 AM
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PatternFlyer
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Default RE: New OS 140RX tuned pipe mounting

Oops, I didn't look all the postings before answering above.
The 3rd picture which is for regular mounting of pipe, you can remove the 2-piece aluminum holders that wraps around the pipe. Use the rest on the mounting flange.

Building your own is not so hard. MK engine mount rubbers (isolators), and a small aluminum tubings, small MK aluminum horns and couple of T-nuts?? (not sure what you guys call it). T-nuts that I am talking about are in the 3rd picture between the two black isolators. (small tubes with threads outside and has flange on one end. They actually have threads inside also). You can also mix and match any spare hardware you have.
My friend and I used soft isolator to mount 4-stroke header just like the 2nd picture. It worked great. If the isolators are too stiff, make them thinner.
I believe ZN-Line's website has lots of pictures that give idea.
Good luck.

Ihncheol Park
Old 08-16-2022, 09:58 AM
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TheEdge
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Default Any interest

Surplus to my needs, Hatori 900 pipe.
$135 shipped to the lower 48.



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