Let me see if i can do the math. been some time since algebra classes

 

Anyone know what the front motion ratio is in the front (if there is one)?

 

Yeah, we probably are. Not that I’ve looked at bump stops on coilovers, well, ever, but I’m surprised those disintegrated that badly.

 

I can't remember wich or when; but I do recall ordering and replacing my bump stops with powerflex.

It might be something to consider?

 

thank you sir i will look at powerflex and see what options they have. I've had good luck with their stuff. i also ordered two new stops from kw just so i'm prepared once the coilovers are out

 

here are the powerflex stops. now I'm thinking these would fit the stock assembly but not sure about the fit on the KW coilovers.

https://www.powerflexusa.com/shop/pf...-2783#attr=209

 

Those go where the rear struts mount to the body. These are the bump stops for the stock setup.

 

did the math from these numbers and I get:

256.499938 lbs/in
4.580582 kg/mm
44.92 n/mm

thats for the rear. assuming the 2hz ride frequency (sporty ride).

so im at 200 lbs/in. which makes sense. a bit soft

 

KW confirmed that the springs on this kit are 200 lbs/in, not progressive. I think I said they were progressive earlier. that was wrong

 

hold on, I found these from powerflex. these look like they could work. I'll probably order them and have them as an option

https://www.powerflexusa.com/shop/bs...cover-kit-2575

 

received new bump stops from KW and PowerFlex. Which ones would yall use?

 

My guess: The Powerflex poly are going to be slightly stiffer when you hit the bump stop but will last longer. The KW ones will probably be a little softer but, like the last set you had, may break down quickly if you are bottoming out and hitting hard on the bump stops.
My 2 cents.

 

Personally - Powerflex.
Those KWS still look like the typical foam rubber ones that have a tendency to breakdown in a short amount of time.
Since your Mini is lowered, you may still have to cut the bumpstops down a bit. If you cut them both - You will automatically see the difference in density and material.
I'm impressed to see you're putting such effort into understanding and fine tuning your suspension.

 

thank you both. i think i will go with the PowerFlex ones. I'll probably cut to match the height of the KW's.

Will get back with results. might be a bit. the projects are stacking up