Quote:
Originally Posted by JProberts
How do the EP1200 inserts affect the cabin sound in the 2SS?
And is this "rear end step out" what I feel when taking a bumpy curb at 45mph and the back end feels like it is skipping across the road?
|
How do the EP1200 inserts affect the cabin sound in the 2SS?
If GM tested the vehicle with listening equipment they would find differences. We have done seat of the pants back to back 'testing' with different people listening. Car 1 OE Car 2 EP1200s installed. Not a single person could tell a difference. It isn't scientific, but it is real world. There is not a single person that has installed them and found them to create a noise issue.
And is this "rear end step out" what I feel when taking a bumpy curb at 45mph and the back end feels like it is skipping across the road?
Yes, that is rear end step out. We could add lowering coils, change the dampers, add a rear sway bar and all they would do is change the point at which it occurs because none of these address the cause of the condition you describe. When the IRS shifts from side to side or front to back or a combination of the two in a twist the motion creates rear end step out. Other parts will mask it or alter the point at which it becomes a bother, but only sub-frame inserts or sub-frame bushes will correct the condition at the source.