Bc racing coilovers?

Mikeaagesen

My struts/shocks are done for and need replaced. I read this article and the BCs caught my attention.

https://www.drifted.com/370z-coilover-guide/#bc

If I need to spend money to replace my stuff, I may as well spend a little more and upgrade. I searched and saw people have these, but I have been unable to hear many reviews after installation.

My car is street driven, but I'd like to start Autocrossing soon. I've had coils on a few other cars and am no stranger to a firm ride. Just want some feedback from anyone who has them. Thanks.

Jhill

Have not used them but they are supposed to be fairly decent from what I’ve heard. They do run a little softer spring rate vs some others though so you have to take that into consideration on how much autocross/track setup you want vs street comfort.

Others to look at in the same range would be (in no particular order) hks, fortune, powertrix, stance.

MaysEffect

^ Agreed.

Comparably. The HKS and Fortune auto kits have better out the box spring setups than the BC kit. But from my experience, BC does have better customer service than HKS, and are capable of providing different springs if you call and ask. But this is pretty much a waste of time if you don't provide them with the right info (spring rates) for your ride and usage.

Quicksilvers

I know two people at the track that use the BC Racing coilovers with success I believe there are better more expensive coilovers out there. I really like the Tein coilovers for the price.

Mikeaagesen

It sounds like the thing to do is get these or similar setups and have a stiffer spring setup installed?

Jhill

Well if you want the stiffer setup then go with powertrix or stance since they already come with a stiffer spring setup, or go with fortune and request the stiffer springs since they will build to order. The BC as far as I'm aware you would be buying the setup and then spending more on stiffer springs and there went whatever savings you thought you would have.

Mikeaagesen

Well I snagged a set of HKS's outta the classifieds. Cant wait to install them.

nasm

Luckily I found a thread about BC racing, otherwise I was planning to start new thread.
Now my question is, how to adjust the rear part, because my shock and spring are separate, I know about the shock and I have done it (Hight + stiffness) but the spring I dont know how to make sure it is in proper length, I know how to use the collars, but I want to understand the logic on how to make sure that springs are set properly after I have done the shock.


Initially after installed the BC racing (out of the box settings) I realized that the car is too lowered, hence I did raised it up a bit, to make sure it is good for speed humps/bumps, so now the question is what should I do for the rear springs, and how to make sure it is in proper settings?
And I want it to be more stiff from the rear, is it only on the shock setting (soft - hard) clicks, or the springs have something to do with stiffness?

Thanks,
NASM

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SeeThruHead

https://www.youtube.com/watch?v=j-uM...nel=TheCarizon

Do you have divorced coilovers?

I'm sure some suspension guru will come and give a perfect answer but. Afaik. You can't do anything to the spring to change stiffness. You can adjust ride height and preload. Neither of which will change the stiffness of your spring.

You can buy stiffer springs tho.

In the video he shows raising ride height on divorced spring setup for bc coilover.

good video to explain how right height/preload don't affect stiffness

https://www.youtube.com/watch?v=eRJ9...=Flyin%27Miata

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JARblue

Yup

You can adjust the shock but not the spring itself. You will have to get another set of springs if you want to change the stiffness. Or like OptionZero mentions below, the SPL midlinks will provide some adjustability.

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OptionZero

The rear spring is a fixed length
The rear spring perch and top mount are fixed locations

You can’t change the height just with the shock.

You can buy a different length spring with the same Or different rate, Swift makes all sorts of springs in different lengths and rates

Or

You can get the SPL adjustable midlink. I thought you already said you were gonna…?
The SPL mild link has a spring perch that has height adjustment. Just make sure you get the right diameter spring, I think it’s 65mm

From talking to SPL directly, a 6 inch spring is appropriate for almost every one

EDIT;
Look at the pictures
https://www.splparts.com/products/37...mid-links.html

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SeeThruHead

oh also good reading

https://www.motortrend.com/how-to/17...-gotten-wrong/

Preload will change ride height without changing the ride quality/stiffness and also without changing the shock body length. Which means you'll have the same suspension travel.

Whereas adjusting the shock mount will change the length of the shock and will change the wheels position at full compression and full droop.

With that in mind don't the divorced rear springs on a BC BR come with an adjustable perch? I think most divorced setups come with that. You can adjust that to adjust preload and subsequently ride height without changing the shock body length. I don't know what is an "acceptable" amount of preload but I assume if you are adding too much preload at some point you will need to extend the shock body length via the adjustable base. And possibly get longer springs like the guy in this thread below:


EDIT: Looks like they do come with adjustable perch?

Bc racing br coilovers

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nasm

Thanks, and I do appreciate the video ...

Thanks, very useful info, appreciated.

Thanks, highly appreciated, I didnt place the order yet, I will soon.
All what I wanna understand is that, the idea/logic of adjusting the springs, and why? because as of now, the car is a bit bouncing from rear, I didnt try to adjust the stiffness yet, because I need to remove the rear plastic covers (in trunk) to reach the adjusting key, for the height I am very satisfied and I dont want to change it, because it is drivable on speed bumps right now, and I cant go lower. So now I believe I need to check the shock stiffness controller and add more clicks towards the stiffness and then try the car one more time.

Very useful info, appreciated.

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A7 370z 2014 - Stillen Catback - Testpipes - UpRev - Dropin filters - Silicon intake pipes - BC racing coil overs - Z1 Subframe collars - Z1 Engine and Trans Mounts - Oil cooler - CatchCan - Z1 brake lines My track videos Here