bump stop length and strut travel

[ray_bandz0]

I'm replacing the worn out dampers and I picked up a set of KYB SB124 rear bump stops. New stock bump stops for the rear are only available as a set with the Motorcraft struts. The problem is that although KYB states this is the correct application for the ST, the bump stop is 1/2" greater in length than stock (stock: 4-3/4" / kyb: 5-1/4"). Considering this reduces strut travel by the same amount, is it better to reuse the old stock bump stops? Wondering if anyone else has run into this issue.

 

[SteveS]

It doesn't reduce travel. The bump stop compresses. It's actually considered part of the suspension.

 

[ray_bandz0]

It doesn't reduce travel. The bump stop compresses. It's actually considered part of the suspension.

I've heard this before as well in other threads, it makes sense with this being a progressive bump stop.

Does this really come into contact with the rear bump stops that often in autocross or track? I've never had stock suspension so I wouldn't know. It had Koni oranges all around and H&R SS when I bought it. When I swapped them out for FA 500s I noticed that the stock rear bump stops were fine, as shown above, and it was the fronts bump stops that were completely destroyed on the bottom half. It was bound to happen with the lower compression of the oranges combined with the big ride height drop, I was just surprised that only the fronts were damaged.

 

[SteveS]

It will depend on how many bumps are encountered on the autocross course or track. If the parking lots and runways are as bad as they were back in the 1980s when I was autocrossing (or for that matter the old Wentzville MAR track I did SCCA drivers school on) then you will hit the bump stops on bumps.