bgoetz

So what ride height can I expect with 10mm preload, 10k springs, and 2mm from bottomed out OTS rears? Can someone give me an idea, because if I can't get to where I want then I may need to buy these before I even install the shocks

SakeBomb Garage

You will be at about 13.375" fender to wheel center. With our lower cup your range would be approximately 11.5" to 14.5" For reference stock is around 14" depending on the exact model year you have. So you are looking at about a 5/8" drop at most with that amount of preload (which is the correct amount of preload for a 10K spring )

bgoetz

Ok so if I remove the 2mm and bottom the mount then I should get to < or = 13.25 which is my goal. Any idea where to set the fronts from the recommended to get a similar height?

SakeBomb Garage

Shoot us a PM

bgoetz

i actually emailed my info in to get my consultation that came with my Ohlins purchase

SakeBomb Garage

Perfect even better!

ckowalc

Just FYI, I took the front and rear bumpstops from my Ohlins DFV kit and had them tested for compression load. They were cycled from 1-11mm of compression (~33% of bumpstop length) 10 times and averaged.

Here is the plot of load vs compression


Then instantaneous rate vs compression


Here's how it looks when you combine the spring with the bumpstop assuming 10mm free shock travel before contacting the bumpstop

SakeBomb Garage

Great to see so many people putting so much effort and thought into the Öhlins DFV! It's great to be part of such a well informed and curious community. Data looks great but it would be nice to see more travel in the test though. Statically the coilover sees approximately 1000lbs, 10mm travel at 8k is 180lbs which gives bumpstop contact at 1.18G vertical load. The spring during additional 10mm of tested bumpstop travel generates another .18G of vertical load and finally the bumpstop load gives another 0.05G. So total bump load at this point is 1.41G which is a reasonable sized bump. The issue is that as you can see the rate at that point is at 14k and going exponential. Would be good to show what happens up to 15mm of travel. Overall excellent work though!

B serious

They did feel fairly soft when I squeezed them.

(TWSS)

ckowalc

Yea unfortunately we were using a small load cell but, yeah, you can clearly see it going exponential. Just as a visual aid here is a graph with an exponential trendline added.