Source for lightweight muffler brackets/hangers, The one on 914R broke today, not sure where I got it |
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Source for lightweight muffler brackets/hangers, The one on 914R broke today, not sure where I got it |
campbellcj |
Jun 27 2015, 11:10 PM
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#1
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I can't Re Member Group: Members Posts: 4,545 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
Hi all,
At the track today my muffler/megaphone hanger broke. Does anyone know where to get this type with the holes? I thought it was pretty cool, except for the breaking part. It did last several years. I know I can use a stock 2.0 one for this application but I don't think I have one at the moment and I think it's heavier and boring lookiing. (IMG:style_emoticons/default/first.gif) Thanks! |
lonewolfe |
Jun 27 2015, 11:15 PM
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#2
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Senior Member Group: Members Posts: 819 Joined: 12-September 11 From: Oakland, CA Member No.: 13,549 Region Association: Northern California |
Hi all, At the track today my muffler/megaphone hanger broke. Does anyone know where to get this type with the holes? I thought it was pretty cool, except for the breaking part. It did last several years. I know I can use a stock 2.0 one for this application but I don't think I have one at the moment and I think it's heavier and boring lookiing. (IMG:style_emoticons/default/first.gif) Thanks! That's an Engman exhaust hanger. Unfortunately he is no longer with us. He made some great products and was a really nice guy. I'm surprised that bracket broke like that. I have one that I'll be installing as soon as my new motor is finished being built. |
falcor75 |
Jun 27 2015, 11:59 PM
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#3
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia |
How does the unbroken end look? It's probably a fatigue crack that caused the failure.
It shouldnt be too hard to trace that onto a paper and go to a company with a lasercutter/waterjey and have some blanks cut. |
rgalla9146 |
Jun 28 2015, 08:05 AM
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#4
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Advanced Member Group: Members Posts: 4,559 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None |
You'd think the reinforcement would prevent that failure.
Mmmmmmm......are you going to use that MFI cam ? |
EdwardBlume |
Jun 28 2015, 08:13 AM
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#5
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California |
Cool piece, and I would probably want one too.
For me, the stock piece and some time at the gym would get it done. (IMG:style_emoticons/default/av-943.gif) |
Andyrew |
Jun 28 2015, 11:29 AM
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#6
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Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Why not reweld it?
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barefoot |
Jun 28 2015, 12:18 PM
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#7
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Senior Member Group: Members Posts: 1,276 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States |
You'd think the reinforcement would prevent that failure. Mmmmmmm......are you going to use that MFI cam ? that reinforcement termination was the cause of the break by creating a hard point for bending to originate, continued flexing in that area led to fatigue. |
mepstein |
Jun 28 2015, 12:27 PM
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#8
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914-6 GT in waiting Group: Members Posts: 19,279 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Or just weld back what you have with a tiny reinforcement on each side and your good to go.
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914_teener |
Jun 28 2015, 12:58 PM
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#9
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914 Guru Group: Members Posts: 5,198 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
You'd think the reinforcement would prevent that failure. Mmmmmmm......are you going to use that MFI cam ? that reinforcement termination was the cause of the break by creating a hard point for bending to originate, continued flexing in that area led to fatigue. Yep....also heat expansion/contraction. Trace it draw it up in cad and have someone burn it out for you Chris. I have Pro E or Solid Works if you want it done. I can't fab it though, a 4 foot laser table is still on my bucket list. |
campbellcj |
Jun 28 2015, 06:51 PM
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#10
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I can't Re Member Group: Members Posts: 4,545 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
Thanks everyone! Shoot, I had not realized it was an Engman product. I did buy several bits from him. It does seem correct that the break was in between the reinforcing weld points.
I can't simply re-weld as the broken-off piece is somewhere at Willow Springs -- I hope not embedded in somebody else's car. (IMG:style_emoticons/default/blink.gif) Thought about having a small run of these made but I figure like many boutique vintage parts, I'd probably sell 3 and be stuck with the rest for eternity. Would be extra sweet in stainless steel, I think. I'll do some web searching and if nothing turns up, maybe I'll try drilling holes in a stock one "R" style. (IMG:style_emoticons/default/sawzall-smiley.gif) |
brant |
Jun 28 2015, 11:28 PM
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#11
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Sorry for the track problems.
Fab one from aluminum. Not hard and you can someone else weld it cheaply if needed |
falcor75 |
Jun 28 2015, 11:58 PM
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#12
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia |
I'd go with Stainless over aluminum...if the steel part suffered from fatigue failure the aluminium will do the same but much quicker unless you make it really sturdy.
Alu will also have the chance of transfering more heat into your gearbox. (Fatigue strength increases with the yield strength of the material.) |
maf914 |
Jun 29 2015, 07:35 AM
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#13
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None |
I remember those exhaust brackets when posted on the forum several years ago. I wondered at the time how much lighter they were versus a stock 914 muffler bracket. The stock brackets are steel metal stampings with the strength and stiffness increased by the curvature of the stamped shape. The light weight version appears to be a flat sheet with a welded rod added to increase the stiffness. Add more rod, add more weight.
Does anybody know the weight difference? |
Krieger |
Jun 29 2015, 09:04 AM
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#14
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Advanced Member Group: Members Posts: 4,714 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None |
Get a stock one and drill some holes to lighten...
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rjames |
Jun 29 2015, 10:15 AM
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#15
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I'm made of metal Group: Members Posts: 3,934 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
How much of a difference between where the end of the hanger end wants to rest when not bolted up and where it sits between the muffler and exchanger when installed?
The end should line up fairly closely at rest to where it's at when bolted up. If not, you're going to stress the hanger unless it's made to line up properly. |
barefoot |
Jun 29 2015, 05:21 PM
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#16
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Senior Member Group: Members Posts: 1,276 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States |
How much of a difference between where the end of the hanger end wants to rest when not bolted up and where it sits between the muffler and exchanger when installed? The end should line up fairly closely at rest to where it's at when bolted up. If not, you're going to stress the hanger unless it's made to line up properly. If it lines up in the North-South direction at room temperature, thermal growth of the H/E's or headers at operating temperature will result in the little ends moving south by perhaps 1/2". You need flex capability to accommodate this movement or the result will be what you saw in this thread. That's why the stock hangers do not have reinforcements like these. |
914forme |
Jun 30 2015, 08:12 AM
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#17
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None |
Just make your own, tube, and FLAPs exhaust hangers mounted off the trans like stock via a flat plate. A little (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/smash.gif) (IMG:style_emoticons/default/welder.gif) your done. Wish I had pictures of my old setup but it is long since gone, and I just cut it up a month or two as I needed the tube for another project. IT was 3/8" tube, or maybe 1/4" can't remember. 1/8" wall though, so it took a conduit bender to fit it up.
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brant |
Jun 30 2015, 08:49 AM
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#18
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
version 1 that we made:
Attached image(s) |
brant |
Jun 30 2015, 08:50 AM
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#19
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
version 2:
Attached thumbnail(s) Attached image(s) |
campbellcj |
Jul 14 2015, 09:53 PM
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#20
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I can't Re Member Group: Members Posts: 4,545 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
So I have a new repro one in-hand now but am unsure that drilling or cutting some of the material away is a good idea with regard to overly weakening it. Obviously the weight savings would be negligible (although every ounce counts) and it'd largely be for looks.
Thoughts? (IMG:http://www.914world.com/bbs2/uploads_offsite/c767170.r70.cf2.rackcdn.com-21-1436932438.1.jpg) |
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