Originally Posted by APynckel
Because rigidity of a chassis and the harmonics of a chassis are not the same thing.
Anyone who denies outright the beneficial aspects of a structural piece that more firmly ties together opposing sides of a vehicle (which would otherwise only be connected by an arch over a driveshaft) with a space truss, is not very well informed in the fields of structures or harmonics. There is flex that would be negated with this brace in place, and the overall harmonics of the car would be changed. Whether that's for the better, Lexus should test and release data (since they decided to release this part as an "upgrade").
Yeah i agree, Chassis bracing helps maintain it's rigidity over time that i do believe.
If you guys should been their when we removed the old roll cage from the SRT IS300 drag car. The Car was do for an upgraded full roll cage, which the old one had minimal bracing, when we started to sawzall the old one out the damn car chassis started to flex make all kinds of sounds and the old roll cage literally popped out of place on the final cutting of it main supporting bar. That right their was proof of how much the chassis flexed and how much the roll cage was really keeping the car chassis aligned.
When the old one was installed it wasn't forced into place, it was placed in and welded down.
i still believe in reinforcement bars and chasssis stiffeners. Remember, if a manufacture only had car enthusiast in mind when building these cars. It would be braced the fudged up. Enough where their wouldn't be useful cargo space. Since your average consumer automobile are not built as a race car or racing in mind their isn't a need for proper or complete bracing. Only "just enough" bracing to get the job done while maximizing interior and exterior space for your average consumer who doesn't care for race/full spec bracing.
i would say struct braces would do more for suspension support for struts than most other bracing and center chassis bracing. Reducing strut tower flexing. its more so sharing the load reducing stress on components working individually. doesn't mean you're track times may go up, but the overall health of the chassis would be improved.
when i used to drive my old SC300 after repeated trips on a back alley way i uneven pavement with pot wholes the interior panels would start to flex loudly due to chassis flex. which had never done that before during the first week on this street, but after several trips. it was getting worse and some panels you can see became a little misaligned at the seams.
Heck 350z's and civic Si's have struct brace bars from factory.
i have a rear Cusco brace installed on my car.