BC True Coilovers Rant
Can you not lower the spring perch? I've never owned coilovers so I don't know, but that's what it looks like. I would imagine that would shorten shock travel, but I'm just throwing out an idea. 
edit: this is exactly what davidv suggested. Seems to make sense to me as well.

edit: this is exactly what davidv suggested. Seems to make sense to me as well.
^^ when you lower the perch it travels down the threaded shock body causing the spring to uncompress. When he adjust the height the spring perch and spring should rotate with the shock body so preload isn't affected.
I don't know if that helped
I don't know if that helped
Last edited by suprasam; May 10, 2012 at 05:24 AM.
just wondering out of curiosity, what happens to the actual spring perch in the rear once you installed the coilovers? I guess now there is just an empty void of where the spring would actually sit?
Are you sure the threaded shock body is bottoming out in the tube? Could it be a buggered up thread in the tube that is preventing the shock from threading in further? I think you need to measure the depth of the threads in the tube versus the length of the threads on the shock, and convince yourself that it's going as far as it can go. (Unless that's what you did when you posted the picture with the tape measure....honestly it was a lot of text and a TL;DR for me)
If the idiots at BC Racing knew anything about suspension (trust me they don't , i talked to them at SEMA) they would know that running a true coilover in the rear of a Z with a 10k front you would want a 4k spring, max 5k.
BTW if you were running the proper spring the rear would be about 1/2 inch lower, just on spring compression with weight on it.
I know spring rates and stuff don't matter, you just want to say you have coilovers and attempt to make your car look cool by slamming it and gettin it all stanced out yo.
BTW if you were running the proper spring the rear would be about 1/2 inch lower, just on spring compression with weight on it.
I know spring rates and stuff don't matter, you just want to say you have coilovers and attempt to make your car look cool by slamming it and gettin it all stanced out yo.
Last edited by terrasmak; May 10, 2012 at 07:54 AM.
Im having the same issues with my BC coilovers in the rear 
I currently have the "62 97 210 008" springs on my car right now.
I think BC sells an adaptor and "shorter" springs. Dont take my word though im still going back and fourth with BC. I wish I got true coilovers though

I currently have the "62 97 210 008" springs on my car right now.
I think BC sells an adaptor and "shorter" springs. Dont take my word though im still going back and fourth with BC. I wish I got true coilovers though
THIS guy did back in 2008 and was happy with the outcome.
Are you sure the threaded shock body is bottoming out in the tube? Could it be a buggered up thread in the tube that is preventing the shock from threading in further? I think you need to measure the depth of the threads in the tube versus the length of the threads on the shock, and convince yourself that it's going as far as it can go. (Unless that's what you did when you posted the picture with the tape measure....honestly it was a lot of text and a TL;DR for me)
If lowering the spring perch is incorrect then how do you expect to adjust the ride height? Mind you there is always a recommended range of travel, and just because it may appear like there is tons of adjustment left you may very well be at the limit. You should have a owner's manual that shows proper range and where to measure from.
just wondering out of curiosity, what happens to the actual spring perch in the rear once you installed the coilovers? I guess now there is just an empty void of where the spring would actually sit?
just wondering out of curiosity, what happens to the actual spring perch in the rear once you installed the coilovers? I guess now there is just an empty void of where the spring would actually sit?
-As stated above also it was replaced with SPL toe arms.
Last edited by TeegsMR; May 10, 2012 at 08:20 AM.
If the idiots at BC Racing knew anything about suspension (trust me they don't , i talked to them at SEMA) they would know that running a true coilover in the rear of a Z with a 10k front you would want a 4k spring, max 5k.
BTW if you were running the proper spring the rear would be about 1/2 inch lower, just on spring compression with weight on it.
I know spring rates and stuff don't matter, you just want to say you have coilovers and attempt to make your car look cool by slamming it and gettin it all stanced out yo.
BTW if you were running the proper spring the rear would be about 1/2 inch lower, just on spring compression with weight on it.
I know spring rates and stuff don't matter, you just want to say you have coilovers and attempt to make your car look cool by slamming it and gettin it all stanced out yo.
Lastly when the the spring is moved from the OEM position to the true style position my 8k spring will actually act like a 4k OEM positioned spring! Couldn't find the thread about this so if someone has the link please post it up! Thanks for your inputs YO!
Im having the same issues with my BC coilovers in the rear 
I currently have the "62 97 210 008" springs on my car right now.
I think BC sells an adaptor and "shorter" springs. Dont take my word though im still going back and fourth with BC. I wish I got true coilovers though

I currently have the "62 97 210 008" springs on my car right now.
I think BC sells an adaptor and "shorter" springs. Dont take my word though im still going back and fourth with BC. I wish I got true coilovers though
Looks like you have BC BR type coilovers.
The spring should be in the spring bucket, not on the shock.
If that is a 062 200 008 spring, it is way too stiff to be on the shock if the front is a 10kg.
Did you have any extra parts in the box? Did you set the springs onto the shock and set the preload yourself or did they ship that way?
The spring should be in the spring bucket, not on the shock.
If that is a 062 200 008 spring, it is way too stiff to be on the shock if the front is a 10kg.
Did you have any extra parts in the box? Did you set the springs onto the shock and set the preload yourself or did they ship that way?
Actually I am not all about slamming/hellaflush yo! Everyone has there on taste/opinions though. I wanted minimal wheel/fender gap but still maintaining proper toe and camber setting, hence why I purchased all the supporting mods, front UCA's, Rear camber arms, rear toe arms, and lockout bolts/washers. I had BC coilovers on my 465 awhp evo 10 that I beat the crap of every day, and every day the coilovers made the car handle like a dream!
Lastly when the the spring is moved from the OEM position to the true style position my 8k spring will actually act like a 4k OEM positioned spring! Couldn't find the thread about this so if someone has the link please post it up! Thanks for your inputs YO!
Lastly when the the spring is moved from the OEM position to the true style position my 8k spring will actually act like a 4k OEM positioned spring! Couldn't find the thread about this so if someone has the link please post it up! Thanks for your inputs YO!
FYI the OEM-type (BC BR series) rear shocks are indeed threaded into the adapter for the lower spring bucket mount, so that the overall shock length can be adjusted to match the desired ride height.







