Remote reservoir shocks

[Kershaw]

Oh sure, I even watched a video on how to do it and it seems really straight forward. But that's not the same as the company responding with advice.

[The Dark Side of Will]

Neither Bilstein or Koni has responded yet. :(

http://www.lmgtfy.com/?q=custom+revalving+bilstein+shocks

[Kershaw]

Huh, yeah maybe that's it. You can read the rules for Prepared if you like. https://www.scca.com/pages/rallycross-cars-and-rules I have a bunch of struts with rusted out tops that would be great for cutting and welding adjustable coilovers onto.

Neither Bilstein or Koni has responded yet. :(

The KONI race shock bodies are just over 2" shorter than your Billy HDs will be. So you can get more travel from those if you haven't considered that option already.

I must be missing something. How does a shorter shock give me more travel? And how would a shorter shock fit into the strut?

[berlow94]

I already have Bilstein HDs, so maybe that is the better option.



This was always focused on the front suspension. And it rules it out because I'd have to cut and weld the front strut and add whatever adapter sleeve aftermarket coilovers have. They have their own spring mount, hence, this is not allowed. That said, if you have a longer drop in shock, or any that I can utilize the stock lower spring perch I am all ears.

Incorrect.
It refers to the location of the mount.
(Aka converting a divorced spring/shock rear to a true coilover setup.)

It doesn’t refer to where on the Strut the spring perch is.
What about cars with factory adjustable coil overs? They can’t have a fixed spring perch.

There might be some sort of point penalty converting to a threaded spring seat, but i have never seen coilovers listed as illegal. Maybe in a bottom of the barrel stock touring class, but then remote reservoirs would absolutely be illegal as well.


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[iXguido]

The KONI race shock bodies are just over 2" shorter than your Billy HDs will be. So you can get more travel from those if you haven't considered that option already.

[Kershaw]

The Koni custom shop can customize valving, but they're usually slammed and have multi-week turnaround times. The Koni valve mechanism is naturally digressive... I don't know how progressive they can make it.

Bilsteins are so simple to revalve that you're better off finding an independent racing shop that does shock valving and working with them.

I already have Bilstein HDs, so maybe that is the better option.

Why rules out? Use longer springs, mount them in the original locations (divorced rear, not true coil-over-shock).
These cars are not designed for true coilover rear anyways without significant reinforcement to the rear strut towers.

This was always focused on the front suspension. And it rules it out because I'd have to cut and weld the front strut and add whatever adapter sleeve aftermarket coilovers have. They have their own spring mount, hence, this is not allowed. That said, if you have a longer drop in shock, or any that I can utilize the stock lower spring perch I am all ears.

[berlow94]

You can get shocks the same length (either short or long) with or without remote reservoirs.
Reservoirs have no effect on overall potential length of a shock.

Why rules out? Use longer springs, mount them in the original locations (divorced rear, not true coil-over-shock).
These cars are not designed for true coilover rear anyways without significant reinforcement to the rear strut towers.

Just don’t max out the allowable angle of your cv joints.

Rallyx is never going to be a long enough run to build up and significant heat that warrants more suspension cooling.


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[The Dark Side of Will]

The Koni custom shop can customize valving, but they're usually slammed and have multi-week turnaround times. The Koni valve mechanism is naturally digressive... I don't know how progressive they can make it.

Bilsteins are so simple to revalve that you're better off finding an independent racing shop that does shock valving and working with them.

[Kershaw]

I already emailed both Bilstein and Koni and asked about custom valving for rallycross/rally. I will report back what they say.

[The Dark Side of Will]

If you can get custom valved Bilsteins, you could have them set up with progressive valving in order to reduce the chance that you'll bottom out the suspension on big bumps.

[Kershaw]

This should explain why pretty quickly.


Also, I just read in the rules that springs need to be the same type and use the original mounting points. So.... this idea is done unless I want to switch up another class and I think that's too much time and money intensive for one winter.

So.. I guess I stick with the Bilstein HDs and add the stiffest shocks I can get? Maybe switch to the Koni SA?

[e30davie]

How does adding external reservoirs give you more suspension travel in the same package...?

Only way to get more suspension travel is to physically fit longer shocks?

[Kershaw]

Spring rates would definitely change, I mean... I wouldn't be running the stock size springs anymore anyway. I would probably run 2.25" coils.

Cooling is a benefit, sure, and rallycross is really tough on the suspension. But I doubt the runs are long enough to really make a diference there.

The main benefit that remote reservoir shocks offer the ix is longer suspension travel in the same package. The tuning and adjustability is great too, but getting more travel into the same size is a huge benefit. Especially since I don't want to increase the ride height.

[berlow94]

Right, the rears are not an issue.



I am looking for more suspension travel. I am regularly bottoming out the suspension at least once per run, especially in the afternoon when the course starts getting rutted up. I am considering a class change that would allow me to run whatever dampers I want.



I am not sure that just cutting and welding the struts and putting in the RWD suspension would work because aren't the dampers quite a bit longer?



Edit: check it out, my ix was in the Washington DC SCCA newsletter. Page 7.

https://drive.google.com/file/d/1n7y...ew?usp=sharing

I did not say to cut and weld to install rwd suspension.
Look at any quality Motorsport setup (JRZ, Penske, Moton, AST, etc...)
It’s not a strut insert like a Bilstein or Koni.

I would look at changing your spring rate and length and putting slightly longer dampers on.

Reservoirs are really only for more tuning adjustability and oil cooling...


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[Kershaw]

Right, the rears are not an issue.

I am looking for more suspension travel. I am regularly bottoming out the suspension at least once per run, especially in the afternoon when the course starts getting rutted up. I am considering a class change that would allow me to run whatever dampers I want.

I am not sure that just cutting and welding the struts and putting in the RWD suspension would work because aren't the dampers quite a bit longer?

Edit: check it out, my ix was in the Washington DC SCCA newsletter. Page 7.

https://drive.google.com/file/d/1n7y1jw_iWeD9yrjHbd0qRjuoFl8Cjpb8/view?usp=sharing