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> Rotesserie Action, Let the fun begin...
Britain Smith
post Mar 14 2004, 02:10 AM
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Although spent the greater part of the day gathering the materials, tools, bribing the neighbors, and sweet talking the wife...everything is cut to fit, holes drilled, waiting for the neighbor who is a professional welder (I cut his lawn for him) to weld everything up tomorrow morning. I took the drawings a fellow Pelican member sent me, modified them a bit where I saw fit, and laid it all out as a proper engineer would do...on engineering paper.

The biggest problem that I have had to work out is the fact that the early ('69) 911/912's did not come with ANY crash protection as the laters car did. All the pictures that I have seen of 911's on rotesserie's have the ends mounted to the reinforced bumper mounts which are sturdy enough to do just fine.

So...my question...take a look at the pictures poested below and let me know if you think that it is going to be enough support my car. The entire car is stripped out except the dash, windows, and doors...the suspension, drivetrain, fuel tank, interior, etc. is all gone. One thought is to actually weld the rear plate to the frame rail and grind them off later. I think that the front is going to be sufficient.

I will post more pictures tomorrow of the finished product.


This first picture is off the rear frame rail and the holes that the little tiny bumperettes mount too.


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Britain Smith
post Mar 14 2004, 02:11 AM
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Picture of the cut to fit plate mounted in the bumperette holes on the frame rail with two M8 bolts.


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Britain Smith
post Mar 14 2004, 02:12 AM
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Another view:


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Britain Smith
post Mar 14 2004, 02:14 AM
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The front mount...this goes through to holes in the body that the front bumper mounts too. There is an additional steel plate mounted to the body here from the factory. I sandwiched two steel plate together here and thought about running a support bar inside the trunk between the two plates.


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SirAndy
post Mar 14 2004, 02:14 AM
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hey! that's not a 914! ...
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Britain Smith
post Mar 14 2004, 02:14 AM
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This is the sandwich plate inside the front trunk.


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Britain Smith
post Mar 14 2004, 02:15 AM
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Lat one...here is the beginning of the front rotator piece. It is basically designed like and engine stand.


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Brad Roberts
post Mar 14 2004, 03:27 AM
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WooHoo.. Home before 1:30am..


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Brad Roberts
post Mar 14 2004, 03:32 AM
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Ok. About the only thing I would have done different is:

I would have made the rear pickup points include the engine mounts. I dont like the fact that you dont have access to the other side of the bolts holding the rear plates on like you do the fronts. You cant put a sandwhich plate on it.


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Britain Smith
post Mar 14 2004, 03:36 AM
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This is the rear mount bar showing how those plates mount on there...


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Brad Roberts
post Mar 14 2004, 03:38 AM
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Forgot to add a picture..

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Brad Roberts
post Mar 14 2004, 03:39 AM
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I think it looks good. Simple easy design.. I'm just somewhat concerned with the rear. I know how a 914 tub flexes on the rotisserie.. I know the 911 will flex a little.

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Brad Roberts
post Mar 14 2004, 03:42 AM
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Do you have a measurement from the roof to the floor ?? Make damn sure you get the stands tall enough that you can flip the car over and the top CLEAR the garage floor. Give yourself extra room. The weight of the car normal side up will cause it to flex one way.. flipping it over will cause it to flex another.


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Britain Smith
post Mar 15 2004, 01:23 PM
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After getting most of the pieces together this weekend, I realized that the locations of the rear mounts were not going to work. As Brad pointed out, there was simply not enough strenght in those threads and it would not allow a sandwitch plate for increase strenght.

So, here is some pictures of my revised design utilizing the 912 engine mounts. My only concern not is the distance from the engine mounts to the rear pivot causing increase amount of torque on the engine mounts. Take a look and let me know what you think.

(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3655_JPG.jpg)

(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3656_JPG.jpg)

(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3657_JPG.jpg)

Here is a picture of me standing on the rear support piece...I was jumping up and down on it...

(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3661_JPG.jpg)

I am still going to add additional supports to the bottom:
(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3662_JPG.jpg)

And to the two rotating parts:
(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3663_JPG.jpg)

My neighbor is a professional welder and for using a 110V Miller Welder, they don't look bad:
(IMG:http://www.britainsmith.com/Porsche/912Progress/images/136_3666_JPG.jpg)
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