 seam welding and rear suspension strengthening, What to do, What I did... |
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| Andyrew |
 Mar 22 2006, 01:55 AM
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Spooling.... Please wait  Group: Members Posts: 13,377 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California 
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So my project for a stronger chassis has begun.
Heres were Im at right now. Took the suspension out today. I'll go do some welding and prep tonight, hit the bed, see what you guys say, and do some more welding tomorrow. (IMG:http://www.teamgracer.com/cars/914club/914v8/914-8%20suspension-003.JPG) Picture of some buckling of the suspension. Other side has a raised area, but is generally flat, this side has raised and concave area's. I'll be adding something here for strenthening, a tube? A flat piece of metal? A triangle? (IMG:http://www.teamgracer.com/cars/914club/914v8/914-8%20suspension-004.JPG) (IMG:http://www.teamgracer.com/cars/914club/914v8/914-8%20suspension-005.JPG) (IMG:http://www.teamgracer.com/cars/914club/914v8/914-8%20suspension-006.JPG) Here is some area's im going to weld, any two pieces joined together I will stitch weld. |
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| ChrisFoley |
Mar 22 2006, 08:03 PM
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I am Tangerine Racing Group: Members Posts: 7,968 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Cracking in this area is primarily due to repeated flexing of the panels which loosens up the pinch welds and/or starts cracks at highly stressed areas of panels. I think what I designed eliminates the flex issue by spreading the loads out to otherwise unstressed areas, therefore stops cracking and spot weld loosening.
I've never been a big fan of seam welds. While it tightens things up it also causes shrinkage/warpage. I like to design things that minimize the total amount of welding required, and use the least amount of added metal to accomplish the goal. Note the additional 14ga. piece along the rocker in front of the outer console. It isn't essential but provides reinforcement to the area between the console and the jack post. I think the GT kits had a similar piece in that location. Regarding the tubular reinforcement of the inner console, I don't think the rearward tube is nearly as valuable as the forward one since the highest loads are on the outer wheel in cornering and the forces push the console in and up. The upward force is well resisted by the existing structure IMO. Here's an example of the tubular brace I like. Attached image(s) 
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Posts in this topic
Andyrew seam welding and rear suspension strengthening Mar 22 2006, 01:55 AM
Andyrew http://www.teamgracer.com/cars/914club/914v8/914-8... Mar 22 2006, 01:55 AM Andyrew http://www.teamgracer.com/cars/914club/914v8/914-8... Mar 22 2006, 01:55 AM Andyrew http://www.teamgracer.com/cars/914club/914v8/914-8... Mar 22 2006, 01:56 AM Andyrew Oh ya, it takes,
11mm 13mmx2 15mm 17mm 19mm 3/4 ... Mar 22 2006, 01:58 AM SirAndy <... Mar 22 2006, 03:29 AM reddog http://www.914world.com/bbs2/ht... Mar 22 2006, 03:34 AM Racer Chris Andrew,
The "buckling" you noted is nothing but a ... Mar 22 2006, 06:45 AM riverman <... Mar 22 2006, 06:48 AM MattR no need to weld, just use bondo
h... Mar 22 2006, 09:21 AM drewvw so the buckling of the suspension, is that a commo... Mar 22 2006, 09:46 AM mike_the_man Andrew,
Sorry for the hijack, but when did you sw... Mar 22 2006, 09:53 AM McMark ... Mar 22 2006, 12:15 PM Sparky <... Mar 22 2006, 12:53 PM Scott Carlberg I would like to Nominate Andy's post/Drawing... Mar 22 2006, 01:27 PM Andyrew Geez andy, I had metal all rolled, tubes formed, a... Mar 22 2006, 01:27 PM Andyrew Heres a possibility. Mar 22 2006, 07:28 PM Racer Chris Here's what I worked out for the outer console... Mar 22 2006, 07:30 PM Andyrew Thanks Chris!
I'll do that.. looks strong... Mar 22 2006, 07:31 PM Racer Chris I have one set of these parts in stock.
Add a tubu... Mar 22 2006, 07:32 PM Andyrew Checked your site, Didnt see a price.
I dont have... Mar 22 2006, 07:39 PM Jeroen Andyrew,
The blue tube in your sketch won't do... Mar 22 2006, 08:07 PM Andyrew Thanks Chris,
That helps!
That is exactly ... Mar 22 2006, 08:08 PM jonwatts Mar 23 2006, 12:24 AM Andyrew Jeroen, Sorry didnt see your post...
I didnt know... Mar 23 2006, 12:53 AM Andyrew Heres a pic of what im planning for the interior.
... Mar 23 2006, 01:06 AM Porcharu [QUOTE=Here's an example of the tubular brace ... Mar 23 2006, 02:15 AM dan10101 That tube brace will fold just as quickly as the s... Mar 23 2006, 03:00 AM dan10101 pic Mar 23 2006, 03:03 AM dan10101 pic of car Mar 23 2006, 03:03 AM dan10101 sway bar hole a tad small. Need to enlargen and re... Mar 23 2006, 03:04 AM Racer Chris ... Mar 23 2006, 06:12 AM Jeroen andyrew,
the pic below shows 2 situations
in the t... Mar 23 2006, 08:37 AM maf914 Andyrew,
You might want to go back and check out ... Mar 23 2006, 10:28 AM Andyrew Mar 23 2006, 11:05 AM Aaron Cox stop pussyfooting and do a real doorbar <... Mar 23 2006, 12:20 PM Andyrew Helps getting in andy.
Getting out is just a matt... Mar 23 2006, 12:23 PM JOHNMAN 