RallyJon

Got the US M030 springs with Bilsteins installed yesterday. With the longer springs there was no information to go by in any of the FAQs, so we set the rears about 3/8" from the bottom. That turned out to be a bit too tall, giving a rear ride height of ~26".

It's been posted here that the rear motion ratio is about 2:1. Seems a bit high from looking at it, but if that's true I should be able to get to right around 25.5" in the back lowering the lower perch all the way.

chris walrod

I cant think that the MR of the rear (or the front for that matter) can be as high as 2:1. That would be A LOT of rising rate!! This is yet another suspension measurement that I need to complete.

RallyJon

Just going by this: from the recent install thread: https://rennlist.com/forums/993-forum/258810-diy-suspension-install-for-dummies.html

I guess we'll see where we end up at the bottom of the threads.

autobonrun

My 96 C4S came with the M030 US option from the factory. I just checked. I'm around 26.5 front and a little less in the rear. I love the car but hate this SUV height. Next spring, the ROW setup goes on my car assuming the prices have not gone through the roof.

JM993

Can anyone tell me how many threads (or how long the threaded section is) on the updated front Bilstein shocks? I know Bilstein added 30mm of thread, but would like to do a quick (overall) measurement to ensure I've got the updated versions.

TIA

InTheAir

You can look at the photos in the DIY in my signature--mine have the extended threads.

JM993

Thanks Jeff. Great pictures. Good luck with the sale of your car.

24FPS

euro mo33's is an option as well. row height but w/ a more "comfort" ride.

think gert had a special on 'em.

fwiw: i have never heard ne could achieve row (or close to) w/ us spec springs regardless of threads on shocks. hmmm.

RallyJon

Depends if you mean ROW normal height, or ROW sport (M030, M033) height. I'm right at ROW normal height with US M030 springs on Bilsteins. The rears have one thread visible under the collar.

agdamis

You are asking the wrong question.

ROWM030 or PSS9, that is the right question.

RallyJon

It's easy to jump on the bandwagon and spout back what others have posted in other threads. A unique situation calls for a unique solution. You have neither the right question, nor the right answer.

24FPS

btw: jon please post pics of before & after? i do remember the "before" @ stock us height.

interested to see how much the threads can do...

bol

RallyJon

Measurements at the fender were/are:

F: 26.3" before, 25.8" after.
R: 26.0" before, 25.6" after.

Since the before numbers are on bald tires, and the after numbers are on full tread, add about .2" to the before numbers. So, the car is .7" lower in front and .6" lower in back than before.