inkatouring

So, I had an RoW M030 suspension put in my 993 cab with Bilsteins. Here's the question: If the Bilsteins are adjustable, why RoW M030 springs? Why not USA M030 springs? My undestanding was that the only difference between RoW and USA springs is the ride height, but with adjustable ride height on the Billys, why bother with RoW?

Falcondrivr

The ROW springs are shorter, so the lowest adjustment with them is lower than the lowest with the USA springs.

Deadeye

What he said

inkatouring

And is that amount lower something that is used in street driving or does that lower the car too much? Put another way, is there enough adjustment in the Billys that you can get USA M030 springs to RoW (or even lower) ride heights?

I mean the difference in the USA and RoW height is important with non-adjustable shocks, but my question, I guess, is whether importance of that difference evaporates when you have shocks with adjustable hieghts like the Billys. (Not that any of this matters to me, as I have the RoW springs in my car.....)

Deadeye

By the extra loading on the stock USA springs to compress them to the length of the ROWs I think you would be changing the designed spring weight.

civerson4

+1

bart1

He's not talking about compressing them unnaturally, but, no, the Bilsteins likely won't go as low as you want with US springs. As far as that goes, the stock shocks are adjustable.

skywachr

Are you saying that the stock Monroes are adjustable or did I not understand correctly?

inkatouring

Thanks. Just wondering if the RoW springs were really necessary given the adjustability of the Billys.

But, I'm with skwatchr; I am under the impression that the monroes are not adjustable.

porscheralph

I do not believe the US stock springs/shocks allow for adjusting the ride height. The shocks do not have a threaded end to allow any adjustment. To lower the car one must use different springs/shocks that are designed for adjustment.

bart1

FS: My rare factory adjustable shocks! (pic taken from p-car.com)

TroyN

They are nominally adjustable for corner weighting purposes only, and only in the front; there are shims to adjust the rear weights.

Martin S.

The fronts do have threads and can be minimally adjusted. There are three different sizes of shims available for the rear.

The other point...shocks and springs are thought of as a system. Generally you want to match up the shocks with the springs, which you have so cleverly done.

So out with that Buyers Remorse; you did the right thing. Congratulate yourself!

RallyJon

I had the U.S. M030 + Bilstein HD combination. A few key points:

1) Lowest it can go is ~ROW standard height, a couple of cm lower than stock.
2) The spring is fully retained, and can not come off the seat at full droop as with lowering springs.
3) At the lowest height, the lower perch is near the bottom of the threads, so you have the same sway bar interference issues as the ROW spring guys have when they try to go to RS or lower height.
4) Rides well (as well as Bilstein ever do ), handles well, really no problems at all and the only performance solution available if you want good handling while maintaining ground clearance.