More rear suspension travel
 

So I've been thinking through a solution to add more rear bump travel.
I'm on Swift Spec Rs with Bilsteins.
I plan to run Buddy Club (or similar) rear lower control arms since they have a, lower than stock, shock mounting location. Then because the Bilstein lower spring perch is removable, I plan on machining a spacer to fit under the removable spring perch on the rear struts equal to the distance between the stock and lower mounting locations.
This would essentially relocate the spring up an equal distance to the movement of the shock body down, restoring said distance in bump travel, whatever that may be 15mm, 20mm, etc.

More bump travel would reduce usage of the bump stops allow for more movement, etc.
Am I completely wrong here? I wish the Bilsteins for our cars were like the ones for Audis. The spring perch mounts on the same circlip, but there are multiple groves to locate the circlip on.
Just thinking out loud. Thoughts?
Don't tell me to "just buy coilovers." I eventually will.

What you are suggesting makes sense but what you gain in bump travel you will lose in droop...

There is at least one co that makes rear strut mounts that add clearance for lowering springs and give back strut travel. I just can't seem to find them atm.

Yes, but the lowering springs essentially add 25mm of droop due to the 25mm drop. Say the LCA relocated the shock 15mm lower, that's still 10 more mm of droop over stock.

I think you're thinking of the Raceeng Top hats. They add bump travel by relocating the shock mounting point up, but do they add bump travel between the shock body in the right location? The definitely add to internal bump travel, but I don't know if they actually add to suspension travel. I suppose they must, and maybe I'm overthinking this to avoid thinking about my grad school homework.

Yes. It works as you described. Popular in the miata/honda competition world. They usually pair with ebay slip on coil over sleeves and some used springs to make for a good budget setup. Koni yellow are popular too. I wanted a similar setup but I did not want to spend the time locating the correct shocks for the application. I believe the upper limit of the valving is around 450-500lb spring rate, probably closer to 400lbs.

Raceseng mounts will add bump travel at a lowered right height but can have adverse effects if the shock wasn't designed for the mount.

When I designed the Penske's I made them to OEM length and stroke so the 1" extended mount would lower the car 1" and retain stock stroke. If a typical aftermarket coilover is shortened from OEM to accommodate a lowered ride height you'll have extra bump travel at the expense of droop travel.

Most OEM shocks have too much droop travel anyway so it may not be a big deal.

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