Andrew,

I'm very impressed with the amount of effort that you put into developing your Bilstein package for the Subby! I'm sure the average Subby owner sending in his struts to Bistein for a $75 off-the-shelf re-valve is not going to get results anything like your package (which is why I suggested not using Bistein for a re-valve in the first place).

When do you plan on having your Evo Bilstein package available??? Will you offer a re-valve service too???

 

if anyone wants to hook it up and tell me what i should tell them specificly to make the outcome better please let me know as my parts are sitting in a box in cali hopefully they did not start..
-told them spring rate max. and i drive the car at autox/semi track events. anything else like the xoogoplex inhibitor should be set at .004" not .008
i have no idea.. just seems like everyone said bilstein would take care of it..now i am worried DAMN YOU EVOM!!!!(kidding)

 

What spring rates are you running or planning to run?? If you plan on driving on the street for any period of time you may not want your shocks valved for "spring rate max". From what I've discussed with Shaik & Bernie, Bilsteins can often be re-valved so that you can run plus or minus 100lbs from a target spring (e.g., shock valved for 400lb front springs will also work reasonably well with 300lb or 500lb springs. If you plan on driving much on the street (vs. a dedicated track/autox car) you probably want to err on the side of suspension compliance vs. ultra high spring and dampener rates.

I'd also be concerned about how much you are lowering the car with the aftermarket springs and how close you are going to be to the stock Evo bumpstops. I was really suprised at the lack of suspension travel on my stock IX when I droop/compressed tested it; it is on the stock bump stops pretty quickly. I haven't taken my suspension apart yet to examine the bump stops in detail but they appear to be fairly hard rubber and non-progressive. Stock early Miata's have similar bumpstops and they tend to suck for street use (not enough travel and a very rough transition from "sprung" to "on the bumpstops". The Miata aftermarket has developed shorter than stock softer MCU bumpstops (both standard and progressive) that provide up to an inch of additional suspension travel and that also don't spike the effective spring rate on initial contact.

Andrew (GTWorx) may be able to provide you with some advice on shortening the stock bumpstops (his Bilstein package for Subbys appears to use shortened bumpstops) as well as tips on improving the low speed compression dampening curve for the re-valve. Hopefully, GTWorx or another Evo vendor will take the time to develop an improved MCU bumpstop for the Evo struts.

YMMV

 

3.2 - 4.8 kg/mm (179 - 269 lbs/inch)
i gave them max

 

Also helps that there aren't any regular Bilsteins for WRX available....they weren't going to make any until we approached them. STI, Prodrive, and Bilstein had special relationships that kept Bilstein from making regular dampers for Impreza....only special co-branded ones that cost way too much money and were impossible to get.

For some reason, new Bilstein HDs for EVO cost a couple hundred more than they do for WRX...add revalving on top of that and it's just more then we think the market would want to spend even for a full new damper. So the plan (for now) is to get a bunch of used Bilsteins and have them revalved and on hand, ready to ship. We could even do a core charge type of thing if the customer already has regular Bilsteins. We are still looking into a full new set but we're not sure.

And thanks! Stick around....sometimes there's good suspension discussion in here that I'm sure you could add to.

- Andrew

 

Give them the max....and ask for some extra low speed compression damping if you can.

- Andrew

 

Agreed on suspension travel....too many people lower the EVO too much....

Some good reads in here, including one on bumpstops:
https://www.evolutionm.net/forums/ev...ead-links.html

The Bilsteins from the MR use an external bumpstop, not internal like most other billies. It's attached to the dust boot. It can be trimmed, but I'm not aware of any replacements at the moment.

- Andrew

 

This thread is turning out to be exceptionally rich in great information. MX5tc and all, your contributions are appreciated.

 

Thanks, I'm slowly working my way though those threads.

I've got a set of Bilstein struts (supposed to be off an MR) in the garage attic; I'll pull them out tomorrow and see what the bumpstops looks like. I'll also see if Shaik's MCU Miata bump stops will fit on the Evo strut...that would be a nice solution if it works.

 

Did you ever take a look at the bupmstops? I want to get a set of Bilsteins and want to make sure I get a complete set including bumpstops, but haven't seen the bumpstops ever.

 

Got sidetracked putting an exhaust on the Miata. I'll try and pull out the MR Billys this weekend and take pics of them and the bumpstops

 

Ooooh if you have them out can you measure the bumpstops? That will help me get the numbers perfect for my bump travel thread.

- Andrew

 

bump for a great thread. any word on these miata bumpstops?

andrew, ygpm!

 

I need a bilstein strut tube... Soo effed

 

I would also be massively interested in this (sending my Bilstein in)