 Body stiffening using donor car longs and rear firewall |
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| Tdskip |
 Feb 13 2018, 09:00 AM
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#1
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Advanced Member  Group: Members Posts: 3,678 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None 
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IF the donor car is going to get cut up (this is the one without vin numbers where the front clip has some funky stuff going on) couldn't I harvest the inner longs and bottom of the rear firewall to weld into my 914/6 project?
Similar to the Maddog interior bracing kit but using the actual factory stampings? The 2.7 or 3.0l engine will handle the modest weight easily I think. Mark, you did this on your Orange car if memory serves, right? |
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| mepstein |
Feb 13 2018, 09:18 AM
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#2
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914-6 GT in waiting Group: Members Posts: 19,220 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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Sounds like a lot of work.
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| Andyrew |
Feb 13 2018, 09:27 AM
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#3
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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
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Factory steel is extremely thin, like 18ga. The stiffening kits are 16 or 14ga.
I dont think you would see a noticeable difference if you were able to make that work. Not to mention the days of work to do such a thing. Now the aftermarket stiffening kits, ala Engman and the like actually produce a noticeable result for a small investment in time and money. |
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| burton73 |
Feb 13 2018, 09:41 AM
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#4
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burton73 Group: Members Posts: 3,484 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
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Engman inner stiffing is the way to go. Have clean holes to weld on. Are you going to do you own welding? This has to be done very slowly to allow to cool or you will bend up your car. People have done it here and their doors will not close or they lose the door gap. Look it up on a search eng.
Bob B (IMG:style_emoticons/default/welder.gif) |
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| Tdskip |
Feb 13 2018, 10:05 AM
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#5
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Advanced Member Group: Members Posts: 3,678 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None
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Well, turns out that may been such a good idea. Glad I asked.
Bob, I do my own structural welding and know to not warp the panels. That said, that is an excellent and very-very important reminder. Thank you. |
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| bbrock |
Feb 13 2018, 10:17 AM
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#6
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains
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QUOTE(mepstein @ Feb 13 2018, 08:18 AM)  Sounds like a lot of work. (IMG:style_emoticons/default/agree.gif) But I think it could work, at least on the long. You'd have to strip all the inner wall out of the inner long, then cut it in the right places. But I don't see why it wouldn't work. The factory pieces are actually 19g, so even a little thinner than 18g., but still, welding that on top of a sound factory structure would add a hell of a lot of stiffness over stock. Can't speak to whether it would be race worthy. I'm not sure about the firewall. I'm not sure the bead channels would nest to lay flat. Would have to try it and see. |
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| mepstein |
Feb 13 2018, 10:30 AM
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#7
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914-6 GT in waiting Group: Members Posts: 19,220 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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Maddogmotorsports.com
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| Tdskip |
Feb 13 2018, 01:37 PM
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#8
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Advanced Member Group: Members Posts: 3,678 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None
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QUOTE(mepstein @ Feb 13 2018, 10:30 AM) Maddogmotorsports.com Yep, on order. |
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| Front yard mechanic |
Feb 13 2018, 01:53 PM
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#9
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Senior Member Group: Members Posts: 1,153 Joined: 23-July 15 From: New Mexico Member No.: 18,984 Region Association: None
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In theory it would only be 100% stronger
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| 914_teener |
Feb 13 2018, 03:02 PM
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#10
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914 Guru Group: Members Posts: 5,193 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
QUOTE(Front yard mechanic @ Feb 13 2018, 11:53 AM) In theory it would only be 100% stronger And what theory is that? Ultimate strength? Tensile strength, |
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| enf2232 |
Feb 13 2018, 06:21 PM
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#11
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Member Group: Members Posts: 86 Joined: 13-July 14 From: Toledo, OH Member No.: 17,621 Region Association: None |
QUOTE(914_teener @ Feb 13 2018, 04:02 PM) QUOTE(Front yard mechanic @ Feb 13 2018, 11:53 AM) In theory it would only be 100% stronger And what theory is that? Ultimate strength? Tensile strength, These are old cars. Lets not talk Ultimate Strength but stick to ASD! |
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| 914_teener |
Feb 13 2018, 07:06 PM
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#12
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914 Guru Group: Members Posts: 5,193 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
QUOTE(enf2232 @ Feb 13 2018, 04:21 PM) QUOTE(914_teener @ Feb 13 2018, 04:02 PM) QUOTE(Front yard mechanic @ Feb 13 2018, 11:53 AM) In theory it would only be 100% stronger And what theory is that? Ultimate strength? Tensile strength, These are old cars. Lets not talk Ultimate Strength but stick to ASD! Nice.....lol. Ok so we can agree then at 50 years old the inner long renforcement kit will 100 percent help to keep a 50 year old car from folding in half. I.ve welded two of those kits in and the amount of care taken not to warp the chassis and time plug welding cannot be underestimated. |
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