C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Cross Brace install?

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Old Oct 21, 2013 | 06:32 PM
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mxw128
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Default Cross Brace install?

I'm installing a convertible cross brace on my 94 coupe and the pictures in the FSM are not great... so i was hopoing someone could answer a few quesitons:

How many bolts are supposed to be in each corner of the cross brace? (I'm just talking about the corners, not the center plate or where it attaches to the floor pan). I've got 4 spacers, do they all go in the rear, with 2 on each side (and none required in the front?) or does each corner get one?

Looking at it: I'm assuming I would use 4 bolts in each corner and the 4 spacers just in the back. It looks like I have 4 threaded holes on each side of the front frame, so I'd guess I'll use all of them and put 4 bolts in each corner there, then have to make 4 holes with nutserts in each side for the back for a total of 16 bolts around the outside. Does that sound right?


Thanks!
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Old Oct 21, 2013 | 06:38 PM
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Sounds correct, if I remember correctly from the last time I was under there messing with the brace. There are no spacers for the front bolts, but the rear does use them on each side.

You will want to utilize the body bolts in the center to get the full effect. Search the threads for cross-brace tips on which bolts to use and how to drill and tap.

While you're under there double check how your exhaust is routed in relation to the cross brace. You might have to do some loosening and repositioning to keep the brace from contacting any exhaust components (been through that already, nothing is more annoying than hearing and feeling the exhaust contacting that brace). I'll eventually have to reposition a front exhaust clamp and re-hang the Corsa mufflers slightly on mine. But, I'll do that when I box-in the brace with more sheet metal for better stability sometime in the spring.

Last edited by JoeUser; Oct 21, 2013 at 06:40 PM.
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Old Oct 21, 2013 | 07:11 PM
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There may also been relevant pictures in this thread -- currently on the first page of Tech...

http://forums.corvetteforum.com/c4-t...nterested.html
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Old Oct 21, 2013 | 10:46 PM
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Thanks for the input. I'm going to try to find a shop to box it in before I install... also need to find a tool for the rivet nuts...
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