68 Convertible x brace - Team Camaro Tech
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post #1 of 23 (permalink) Old Apr 17th, 02, 03:12 PM Thread Starter
 
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I need a picture of a 68 convertible x brace. If anyone has a pic or knows where i can get one, let me know.
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post #2 of 23 (permalink) Old Apr 17th, 02, 03:50 PM
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There are pictures of this brace in several of the online catalogs for camaro parts.
Unfortunately Ground Up's site does not have a picture or list these - maybe they can add that.
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post #3 of 23 (permalink) Old Apr 18th, 02, 03:03 AM
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Check out this picture from Ray's website:
http://www.geocities.com/hrayhouston/exhaust.html


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[This message has been edited by rs1968ss (edited 04-18-2002).]
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post #4 of 23 (permalink) Old Apr 18th, 02, 03:39 PM
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post #5 of 23 (permalink) Old Apr 21st, 02, 12:05 PM Thread Starter
 
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Thanks a lot guys. That picture really helps. I installed a flowmaster american thunder system on my 68 convertible today. I don't have one of those, but i think i'll make one out of tubing. Thanks.
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post #6 of 23 (permalink) Old Apr 22nd, 02, 01:42 AM
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How did that exhaust system fit? I've read they don't fit well on conv, especially if you still want to use the X-brace. Did you use an x or H cross pipe?
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post #7 of 23 (permalink) Old Apr 22nd, 02, 10:22 AM
 
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I am about to order the Flowmaster American Thunder exhaust system for my 69 Convertible. I called Flowmaster and asked them if their system will fit on convertibles. They said that they provide spacers that drop the system 3/4" to clear the convertible supports.
I have not talked to anyone who has actually installed it on a convertible but I guess I will find out.

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post #8 of 23 (permalink) Old Apr 22nd, 02, 11:20 AM
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I'll bet the spacers are to lower it under the cross bracing, not the x-brace.

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post #9 of 23 (permalink) Old Apr 22nd, 02, 02:55 PM Thread Starter
 
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The American Thunder system fits perfect under my 68 convertible, although it does not yet have the x brace installed yet. I am going to make it so that the x brace goes under the exhaust and will probably shim the x brace if needed.
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post #10 of 23 (permalink) Old Apr 22nd, 02, 07:06 PM
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The spacers from Flowmaster go between the floor pan and the X-brace to lower it @ 3/4" to clear the exhaust tubing.
The system fits fine through the tunnel area but fitting over the axle and out the rear took some fussing to get right.
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post #11 of 23 (permalink) Old Apr 23rd, 02, 02:07 AM
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Does the x-brace hang very low where ground clearance is a concern?

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post #12 of 23 (permalink) Old Apr 23rd, 02, 03:02 AM
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I wouldn't think 3/4" would make the X-brace any lower than frame rails.

I have a few questions for y'all that have installed the American Thunder system:

How does the American Thunder system sound?
Did you use the H-pipe that comes with it?
Is there an upgrade to a better/quiter muffler?
Did the reducers bolt right up to your headers or did it take any pipe bending?
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post #13 of 23 (permalink) Old Apr 23rd, 02, 08:36 AM
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The 3/4" didn't make the X-brace lower than anything else under there, but the rounded rear part of the brace did drag over a couple of speed bumps.

In answer to your questions;

IMHO - it's a little loud (remember I'm older) and I think Convertibles attract enough attention without the extra noise.
Yes - with minor mod.s
Yes & No - Flowmaster has a crossover type that's quieter, but I'm not sure you could call it an "upgrade" as it doesn't flow as good.
Yes & Yes - the pipes bolted okay to the collectors, but we had to rebend the pipes to line up and if I had it to do over again I would have cut a little out of pipes to move the assembly forward for more axle clearance. There are many variations in collector location and we got this system a little to long during fab.
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post #14 of 23 (permalink) Old Apr 23rd, 02, 08:39 AM
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Sorry - that was supposed to be 'the rounded front part of the brace at the rear of trans.'
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post #15 of 23 (permalink) Old Apr 26th, 02, 03:13 PM
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Just to "Ditto" what others have said. I installed the system in my 67 convert. Fit great, very easy to install. Yes it does come a little close to the rear axle. Mine hits ocasionally. It would be better to move it forward about and inch but the monting bolts don't line up then. Also I was not able to use the x-brace. Mine hung too low and would have hit a lot. I just left it off, but intend to install subframe connectors to make up for the loss.

Highly recommend the system but I think it's a little loud at WOT but OK just crusing.
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