My new adjustable & dampened exhaust brackets

Very nice!

 

Are you the intial tester for these brackets?

 

Looks great! Is this for the OEM exhaust or their x-pipe?

 

Very interesting!

 

Hi Ronnie,
How to get this parts?
Btw am a future F430 and just make a preparation for my F430

 

Maybe it is me, but how are the brackets connected to the pipe? Is there a strap or some other device making the connections?

 

The bracket has a bent over flange that the pipe sits on, Then there is a strap clamp (T clamp) that tighten both parts together.

The dampener may see some heat. May want to keep an eye on that to make sure it does not degrade. Also there are some sharp bends that are not relieved where it transitions. This can be stress points where cracks can start.

The brackets do look way, way better than stock!!!!

Good Luck!

 

Nice upgrade right there. Rubber bushes should stay coolish.

 

Very interesting. How do the brackets allow the exhaust to move rearwards?

 

Hey Ronnie - any idea what kind of plastic/rubber/composite/urethane etc those dampers are made of? My Tubi just caught on fire and I may need to make my own or have them made! TIA for any leads.

 

How much and how's this compare to the Capristo bracket?


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Smart design. The stock brackets are notorious for breaking. Keep us all posted with an update.

 

Please explain "caught on fire" and if you have some pictures it would even be better.

 

Looks like a suspension control arm bushing was used in the fabrication.

 

On the 430 scud, the tubi is mounted to the gearbox via a bracket with 2 bolts and a nut. There are three sliders on the bracket to which the muffler mounts. The sliders are accepted by three rubber bushings. One of these bushings was smoking and the rubber had red veins in it that were on fire. I didn't measure the temp until I had doused it in water, but it was still over 300F.
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OMG, that sucks, seems like all the data wasn't in when they sold this design to the public. Maybe they should be told about the high temp and rubber on fire...

 

Monday I will be calling tubi USA aka champion. Will keep you guys posted.

 

Guys,

Here is the main problem with the 430 OEM exhaust system.

Any material, when heated, expands. Stainless steel expands at the rate of 1.7x 10ˉ⁵ inch/inch-deg. In other words, if you take a piece of stainless steel (doesn’t matter the cross sectional shape), say, a 430 exhaust system of about 50” length, and heat it to, say an average of 600°F, that piece will increase about 0.50” in length.

This is all well and good, except that the 430 exhaust scheme puts severe restraints on that expansion. The OEM muffler is rigidly mounted to the transaxle. The engine and transmission also expand in length some, but they are at around 200°F, so don’t expand as much. Also, the exhaust headers are rigidly mounted to the engine, on one end, and to the cats on the other end. Ultimately, the exhaust components are forced to expand a net ¼”, but they can’t because of the restraints of the mounting scheme. This results in a bending load being applied to each exhaust runner of the headers and on the two side supports also mounted to the rear of the transaxle and rigidly to the exhaust tube where the cats join the tip tubes coming out of the muffler and proceeding to the tips at the rear of the car.

It gets better. Every time you take your 430 out for a spin, this restrained expansion occurs and the bending loads are applied to the exhaust runners and the side supports. Then you come home and the engine cools back to ambient temperature (70°F to 600°F then back to 70°F), so the exhaust system returns to its original length and the bending loads on the headers and side supports are released. After this is done several dozen times, fatigue sets in and things break at the weakest points: the runners break at the joint with the mounting flanges or at tubing joints and the side supports break just above the little 90° brackets. The dealer that sold my 07 to me had just replaced the headers and one of the side supports had a crack halfway through it. Also, the MKII headers were “upgraded” over the MKIs by just applying heavier welds between the runners and the mounting flanges. Classic.

Also, it is very hot in the 430 engine bay, so, at best, any rubber will harden much quicker than out in ambient conditions and, at worst, it will catch fire as seen above.

I have mounted my OEM (pending upgrade to Novitec) exhaust on a pair of Capristo mounts. As an engineer, I like the Capristo design because it is all-metal and accommodates the expansion (visibly about 0.30”) of the exhaust system with slots, thus eliminating all the restraints.

Tom (retired PE)
07 F430 Coupé

 

Ron, thanks for the top view of the bracket.

How much testing time do you have on these brackets, and is anything being effected adversely by the heat?

For someone like me who is considering moving up to a 430, this seems like a good first project to under take.

Thank you for your efforts.