Various Chassis Braces?

[Ernest72]

Originally Posted by Roadcone

some older JDM cars the floor plans flexed like hell and they really could use seat rail bracing... not like that but they could use something.



That's subjective. I'm asking for objective.

My 04 turns on rails. All the braces and bushings really changed the car. But man the poly bush in my anti lift kit gets me every day. I feel every crack that is perpendicular to the car/road. Railroad crossings suck. Literally can shake loose fillings. And that ones a bitch to change. At least most of these braces you can just unbolt if they are harsh.

[Yoniyama]

It is common for Toyota to add a fender brace to the A-post, many Lexus models (IS250, GS350, etc) have them OEM.

It is interesting that TRD only adds the fender brace and a stiffer v-brace in the engine bay for the 14r-60, for chassis re-inforcement.

I added a non-TRD front fender to A-post brace and it was a very worthwhile mod.

I think braces are becoming more popular, as a standard OEM fitment. If you look at certain GM models (eg the ATS) or BMW's, you will find a lot of braces already fitted. I read that GM claimed 30% improvement in chassis stiffness from the braces added to the ATS.

While I can't measure the incremental benefit of each brace, but in principle,added stiffness should generally lessen chassis flexing, hence fewer rattles down the road.

The only surprise is a quotation from Tada-san, in an interview of Supra, when he claimed that too much stiffness actually slowed the car down!

[venturaII]

Originally Posted by Yoniyama

I added a non-TRD front fender to A-post brace and it was a very worthwhile mod.

Which one? How was installation?

[EAGLE5]

Originally Posted by Yoniyama

The only surprise is a quotation from Tada-san, in an interview of Supra, when he claimed that too much stiffness actually slowed the car down!

Cite your source! Suspension stiffness maybe. Frame stiffness no.

A well-designed monocoque is the best road to stiffness.

[Yoniyama]

Originally Posted by jsimon7777

Cite your source! Suspension stiffness maybe. Frame stiffness no.

A well-designed monocoque is the best road to stiffness.

See interview with Tada-san on the Supra:

[ame]https://www.youtube.com/watch?v=tmzNNckDm4s[/ame]


The chassis (not suspension) can be too stiff, according to Tada-san.

[EAGLE5]

I cannot make it through 20 minutes of video for that.

[Yoniyama]

Originally Posted by venturaII

Which one? How was installation?

Please see photo attached.

[Ernest72]

I can say that I remember my butt Dyno feeling the fender cowl braces I did from turn in concepts on my 04 WRX. But who knows?

[AndMsc]

Originally Posted by norcalpb

Are you talking about the rear v bars from the 14r60?

https://www.japanparts.com/parts/detail/?id=53517

[AndMsc]

Do you think this does anything?
https://www.japanparts.com/parts/detail/?id=53482
It seems to brace a single part.

[NoHaveMSG]

Originally Posted by AndMsc

Do you think this does anything?
https://www.japanparts.com/parts/detail/?id=53482
It seems to brace a single part.

That seriously has to be a joke. It looks like it mounts from one subframe mounting point to the other on the rear of the car. So it is bracing the mounting bolts together

[AndMsc]

Originally Posted by NoHaveMSG

That seriously has to be a joke. It looks like it mounts from one subframe mounting point to the other on the rear of the car. So it is bracing the mounting bolts together

Exactly. Does it make sense? I mean does it give any benefit to brace the mounting bolts together?

[AndMsc]

Originally Posted by AndMsc

https://www.japanparts.com/parts/detail/?id=53517

And this do you thing links the top of the shocks to the top of the trunk frame?

[NoHaveMSG]

Originally Posted by AndMsc

Exactly. Does it make sense? I mean why would one brace the mounting bolts together?

I mean I guess that is a long bolt passing through a tall bushing and could help. I couldn't imagine it is doing that much.

Originally Posted by AndMsc

And this do you thing links the top of the shocks to the top of the trunk frame?

Looks like it bolts to upper mount for the rear shocks. There are two studs from the shock mount that poke up into the trunk right there. I don't believe there is anything else they could bolt to in that location.