 Rear Trunk Cut Out |
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| EdwardBlume |
 Apr 21 2012, 07:21 AM
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#1
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914 Wizard  Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California 
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Respectfully, is this a dangerous hack job totally compromising the structure of the car?
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| EdwardBlume |
Apr 21 2012, 07:22 AM
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#2
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California
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More pictures...
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| JoeSharp |
Apr 21 2012, 07:35 AM
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#3
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In Irvine, Ca. May 15-18 Group: Members Posts: 3,947 Joined: 9-July 03 From: DeLand, Florida Member No.: 898 Region Association: South East States |
Are you going to get rear-ended on the street? Pertty much what I did to Carerror. I put in a cross brace between the shock towers and back to the dog bone on top of the tranny pick-up points. The build thread is in the Garage, over on NARP under the title Carerror. Let me see if I can find the picture.
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| EdwardBlume |
Apr 21 2012, 08:33 AM
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#4
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California
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QUOTE(Joe Sharp @ Apr 21 2012, 06:35 AM)  Are you going to get rear-ended on the street? Pertty much what I did to Carerror. I put in a cross brace between the shock towers and back to the dog bone on top of the tranny pick-up points. The build thread is in the Garage, over on NARP under the title Carerror. Let me see if I can find the picture. Thanks. Not a street car. No windshield. |
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| Mike Bellis |
Apr 21 2012, 09:31 AM
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#5
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Looks like easy access. It's a race car, so fuch it!
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| McMark |
Apr 21 2012, 09:54 AM
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#6
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Pretty common modification. Very little (if any) structural effect on the chassis, IMHO.
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| Randal |
Apr 21 2012, 10:24 AM
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#7
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
The two important structural areas on a 914 in the rear are the shock towers and the transmission cross member.
You can lose the entire floor and the transmission cross member will pretty much stand on it's own. The shock towers however, to remain solid need to be tied into the roll cage. You can run without them being tied in, but the suspension settings get compromised under load IMHO. BTW Mark did my trunk and did a great job. In fact the idea to do your trunk came from Mark's work. (IMG:style_emoticons/default/idea.gif)  |
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| EdwardBlume |
Apr 21 2012, 11:25 AM
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#8
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California
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Thanks Randal. Great picture. I had a buyer for the race car last night, who had reservations about the rear trunk structurally with the floors gone.
I've seen this modification so many times on race cars that it kind of surprised me. I would love to collect more experience and pictures to surface any real issue. Thanks again. |
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| SirAndy |
Apr 21 2012, 12:04 PM
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#9
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Resident German Group: Admin Posts: 41,662 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(RobW @ Apr 21 2012, 10:25 AM) I had a buyer for the race car last night, who had reservations about the rear trunk structurally with the floors gone. I've seen this modification so many times on race cars that it kind of surprised me. I would love to collect more experience and pictures to surface any real issue. Most racecars i have seen have at least additional bracing going down from the shock towers to the rear transmission mount crossbeam. That ties in and triangulates the tranny mounts with the rest of the chassis. It also takes care of any potential structural issues in that area. (IMG:style_emoticons/default/popcorn[1].gif) |
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| Randal |
Apr 21 2012, 12:49 PM
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#10
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(SirAndy @ Apr 21 2012, 11:04 AM) QUOTE(RobW @ Apr 21 2012, 10:25 AM) I had a buyer for the race car last night, who had reservations about the rear trunk structurally with the floors gone. I've seen this modification so many times on race cars that it kind of surprised me. I would love to collect more experience and pictures to surface any real issue. Most racecars i have seen have at least additional bracing going down from the shock towers to the rear transmission mount crossbeam. That ties in and triangulates the tranny mounts with the rest of the chassis. It also takes care of any potential structural issues in that area. (IMG:style_emoticons/default/popcorn[1].gif) Yup, good idea. I'd done it as well, but didn't want to add the additional weight. On the other hand did run bars from the front shock towers to the top of the torsion mountings in front. |
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| jimkelly |
Apr 21 2012, 02:22 PM
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#11
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
i wonder if this negatively effects aerodynamics of the cars at higher speeds.
want to keep the rear down. jim |
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| McMark |
Apr 21 2012, 03:58 PM
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#12
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Jim, keep air from getting under the car in the first place. (IMG:style_emoticons/default/wink.gif)
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