928M top cross brace
#1
Three Wheelin'
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hehe, sorry Carl, i messed a bit with your cross brace.... perhaps not helping much, but "psychological-mental-and having the means " i tought it would also better connect the front suspension anchor points... ... ![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
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greetz
Norbert
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greetz
Norbert
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#2
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Queue Jim Bailey explaining the difference between a car with upper & lower control arms versus a mcpherson strut ![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
Looks very cool - something Carl should consider adding to his, or as another option.
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Looks very cool - something Carl should consider adding to his, or as another option.
#3
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for the ones who want to copy it : tack weld it with the cars weight on the wheels ! Jacking up the car and loosening the bolts , you see the side walls going open for sure some millimeters !
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#4
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Actually Barry when you cut away much of the inner fenders , the triangle to the cowl sections , you greatly weakened the side to side support to the spring towers so your experience might differ from others. That thin folded sheet metal may not be very strong in compression but it is under tension. And they compliment each other when the cross brace is in place. Unibody cars are like Origami birds , flat sheets gain form , structure and strength from the folds. Porsche put that sheet metal "in the way" because the car NEEDED IT , not just to make clutch master cylinders hard to replace.
#5
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Actually Barry when you cut away much of the inner fenders , the triangle to the cowl sections , you greatly weakened the side to side support to the spring towers so your experience might differ from others. That thin folded sheet metal may not be very strong in compression but it is under tension. And they compliment each other when the cross brace is in place. Unibody cars are like Origami birds , flat sheets gain form , structure and strength from the folds. Porsche put that sheet metal "in the way" because the car NEEDED IT , not just to make clutch master cylinders hard to replace.
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#6
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greetz
a noob Norbert
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#9
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#10
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Actually Barry when you cut away much of the inner fenders , the triangle to the cowl sections , you greatly weakened the side to side support to the spring towers so your experience might differ from others. That thin folded sheet metal may not be very strong in compression but it is under tension. And they compliment each other when the cross brace is in place. Unibody cars are like Origami birds , flat sheets gain form , structure and strength from the folds. Porsche put that sheet metal "in the way" because the car NEEDED IT , not just to make clutch master cylinders hard to replace.
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#11
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I have thought about this a lot. This makes more sense to me than the stock brace which bolts to nothing heavy or at a critical point . Even better would be to get the connecting points closer to the upper A arm ties.
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The upper A arm mounts are already triangulated to the engine cross member by the two "brackets" 928 375 063 00 and 928 375 064 00 shown in PET under engine suspension 109-00 .
#13
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that is correct , for so far as 1 bolt... of the 2 holding the upper A arm.
#15
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