tigeo
Autocross Champion
- Location
- Richmond, VA area
The issue is that the stops are really springs, not "stops". Those springs are part of the suspension and factored into the spring rate and travel to give you that ramp up closer to the extent of the bump travel so you don't bottom out harshly; even linear OEM springs have a progressive portion of the curve when installed on the damper with the jounces. The lowering spring folks are taking them into account when designing the springs. If they tell you to cut them, cut them, if not, leave them. You are actually touching/"in" the stops when you lower your car wtih most coilovers/lowering springs by design and most folks don't realize this. Yes you can trim them a bit also which really just reduces the spring rate at ride height slightly and causes a more progressive ramp-up near the end of travel but I can see this reducing the bounciness a bit if you have that issue b/c you are constantly on/using the jounces that are v. progessive. This is espeically true up front where you only have about an inch and change of bump travel when lowered ~1". It's a tuning tool for sure.Just jumping in to give my perspective. It seems to me, that if the factory stops are designed to sit at a particular height for factory setup up, and you drop the suspension by say 25mm, the stop should be cut by that drop amount (or close to it) to allow the same room for before you hit the stop.
1/8"(3mm)-1/4"(6mm) cut from a stop that now has the body 25mm closer would do very little in my view. Everything must drop equal or you will hit the stop much sooner over the same bump as the stock set up because uncut it physically has less room to take up.
Seems like a no brainer to me.
Good bit:
https://hrsprings.com/technical/micro-cellular-jounce-bumper