I had to change my rear wing mount, It broke. |
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I had to change my rear wing mount, It broke. |
URY914 |
Apr 27 2014, 07:21 PM
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#1
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
At my last a/x I noticed the wing was not sitting level and was leaning on one side. Upon closer inspection the left mounting bar was cracked at the weld to the tranny support. The arrow in the photo below points to the area of the weld. I'd show you a close-up pics but the weld was so shitty I'm embarrassed to show it. I never really liked how I fab'd it in the first place so this gave me a chance to do it right. The new mount will allow me to be able to attach a lower rear diffuser in the future.
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Woody |
Apr 27 2014, 07:24 PM
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#2
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Sandbox Rabblerouser and head toilet scrubber Group: Members Posts: 3,858 Joined: 28-December 10 From: San Antonio Texas Member No.: 12,530 Region Association: Southwest Region |
How much weight will a better weld add? (IMG:style_emoticons/default/poke.gif)
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URY914 |
Apr 27 2014, 07:26 PM
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#3
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
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URY914 |
Apr 27 2014, 07:27 PM
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#4
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
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Woody |
Apr 27 2014, 07:29 PM
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#5
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Sandbox Rabblerouser and head toilet scrubber Group: Members Posts: 3,858 Joined: 28-December 10 From: San Antonio Texas Member No.: 12,530 Region Association: Southwest Region |
Sorry, it happens. (IMG:style_emoticons/default/beerchug.gif) |
URY914 |
Apr 27 2014, 07:29 PM
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#6
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
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URY914 |
Apr 27 2014, 07:31 PM
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#7
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
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Woody |
Apr 27 2014, 07:37 PM
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#8
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Sandbox Rabblerouser and head toilet scrubber Group: Members Posts: 3,858 Joined: 28-December 10 From: San Antonio Texas Member No.: 12,530 Region Association: Southwest Region |
That's a nice looking setup. Doubt you'll have issues with it. Beautiful work by the way. (IMG:style_emoticons/default/beerchug.gif)
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URY914 |
Apr 27 2014, 07:39 PM
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#9
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
I also added cable supports to the wing at the top of the supports and welded tabs to the roll bar under the targa bar. I used small aluminum turnbuckles to tighten the cables and installed them diagonally in an X from the wing to the roll bar tabs.
I also made larger wing end plates out of 1/16" aluminum sheets. The old end plates I made myself out of carbon fiber and fiberglass and were too heavy. OK, now everyone can chime in and tell me how I should have done it different. |
URY914 |
Apr 27 2014, 07:42 PM
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#10
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
That's a nice looking setup. Doubt you'll have issues with it. Beautiful work by the way. (IMG:style_emoticons/default/beerchug.gif) I also added the gussets to the inside and welded a plate between the bars on the outside so it is much much stronger. It strengthens the entire rear end. The ass end of it was always too weak and I'm sure it had some flex problems before. |
Maltese Falcon |
Apr 27 2014, 07:47 PM
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#11
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Advanced Member Group: Members Posts: 4,647 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Paul, broken weld at the mounting point = your downforce is working well.
Great looking rear trunk area, we have also joined the Trunkless Brigade (IMG:style_emoticons/default/sawzall-smiley.gif) Must be a fun racer ! Marty |
URY914 |
Apr 27 2014, 07:58 PM
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#12
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
I think it broke for several reasons.
- The weld was crap. - I leave the wing on when I haul it on my open trailer. - It would vibrate/twist/shake around too much which placed added stress on the welds. |
r_towle |
Apr 27 2014, 08:02 PM
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#13
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Yah yah, but you did not answer Woody,s question.
how much weight did you just add? |
bulitt |
Apr 27 2014, 08:28 PM
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#14
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Achtzylinder Group: Members Posts: 4,188 Joined: 2-October 11 Member No.: 13,632 Region Association: South East States |
We need a vendor to produce Aluminum rear control arms!
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URY914 |
Apr 27 2014, 08:28 PM
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#15
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,662 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
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Woody |
Apr 27 2014, 09:13 PM
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#16
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Sandbox Rabblerouser and head toilet scrubber Group: Members Posts: 3,858 Joined: 28-December 10 From: San Antonio Texas Member No.: 12,530 Region Association: Southwest Region |
Yah yah, but you did not answer Woody,s question. how much weight did you just add? Believe it or not I don't have a set of scales to weigh the car after I make a change. (IMG:style_emoticons/default/blink.gif) |
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