How? It doesnt increase roll stiffness. The front/rear braces are supposed to stop strut tower deflection, nothing more. The rear towers arent budging on the bank vault E39 chassis, and on the front they arent gonna move a lick with the cushy soft stock suspension. I will say this though, they do seem to make a difference in the way the steering feels.I drove 2 stock M5s before buying my current one with Dinan front and rear braces. Only thing I can say is that the front end is especially "tighter" with the brace. My front end is more responsive despite my Steering center link needing replacement.
The rear brace WILL make the car more prone to (off throttle/drop throttle) oversteer.
I will say this though, they do seem to make a difference in the way the steering feels.
The only time I noticed was with sticky R comps and on coilovers with 1000lb springs.Do some searching...this has been covered many times over the years. The net of it is that the E39 is a very stiff body structure both in torsion and bending stiffness. The natural frequencies in both modes are significantly higher than any prior BMW chassis...enough so that further improving them for the E60 was difficult enough that only a very minor increase was made.
There is no measurable performance benefit that anyone has ever documented. Owners are not able to tell if one is present or not in blind testing. No vendor has ever provided measured data for a strut bar on an E39 either. It would be rather easy to put some strain gauges and capture real time strain data which could then be back-calculated to show what load the bar is carrying in real time conditions.
On older chassis designs, especially something like the E12, E21, E28, etc, these bars are definitely useful as the torsion and bending nat freqs of those chassis is much, much lower than an E39.
Chuck
If you feel something its Probably the placebo effect. :hihi: My 2 cents...
dont worry, i already know the truth.Do some searching...this has been covered many times over the years. The net of it is that the E39 is a very stiff body structure both in torsion and bending stiffness. The natural frequencies in both modes are significantly higher than any prior BMW chassis...enough so that further improving them for the E60 was difficult enough that only a very minor increase was made.
There is no measurable performance benefit that anyone has ever documented. Owners are not able to tell if one is present or not in blind testing. No vendor has ever provided measured data for a strut bar on an E39 either. It would be rather easy to put some strain gauges and capture real time strain data which could then be back-calculated to show what load the bar is carrying in real time conditions.
On older chassis designs, especially something like the E12, E21, E28, etc, these bars are definitely useful as the torsion and bending nat freqs of those chassis is much, much lower than an E39.
Chuck
You trollin?dont worry, i already know the truth.
i just wanted a few people to take note that the e39 chassis is still as still and that strut braces are for the most part, "bling" mods.
:hihi:
Bingo! He's home alone with nothing better to do.You trollin?
trying to figure out the wiring on these seats. i have nearly all the wires matched up, and figured out, but there's 1 wire i dont know about...well actually 2 i dont know haha...Bingo! He's home alone with nothing better to do.
I don't believe you. There is nothing that you don't know about. :rofl:trying to figure out the wiring on these seats. i have nearly all the wires matched up, and figured out, but there's 1 wire i dont know about...well actually 2 i dont know haha...
well you see the issue is that the older cars are single stage, while the new cars are dual stage. old cars have round pin connections, new cars have straight pins.I don't believe you. There is nothing that you don't know about. :rofl:
Ding ding ding!Do some searching...this has been covered many times over the years. The net of it is that the E39 is a very stiff body structure both in torsion and bending stiffness. The natural frequencies in both modes are significantly higher than any prior BMW chassis...enough so that further improving them for the E60 was difficult enough that only a very minor increase was made.
There is no measurable performance benefit that anyone has ever documented. Owners are not able to tell if one is present or not in blind testing. No vendor has ever provided measured data for a strut bar on an E39 either. It would be rather easy to put some strain gauges and capture real time strain data which could then be back-calculated to show what load the bar is carrying in real time conditions.
On older chassis designs, especially something like the E12, E21, E28, etc, these bars are definitely useful as the torsion and bending nat freqs of those chassis is much, much lower than an E39.
Chuck