Bc Coilovers Rear Raising/lowering

[V(35)Powarh!]

Hi Guys,

I have a set of bc coilovers i installed at peddars atm the rears are a little too low, getting sick of scraping over speed bumps (dont even know why some of them are so big!) anyways i wanted to diy and raise the rears however its not a true coilover for these rear v35 coupe where strut and spring is positioned seperately.... could someone please guide me on how i would be able to raise the rears i have done research and it gets a hell of alot more confusing as i am supoosed ot match the strut with the spring? my thoughts are i juts need to adjust the strut bar up and down and that will raise and lower it? please help as i would really like to raise the car but also dont want to spend money taking it to peddars....

cheers!

[Nightcrawler]

Almost all adjustable setups for V35 have a bottom mount that the spring sits on, and this can screw up and down to adjust the height. So you need to remove the rear springs completely (very easy job), pull out the bottom spring mount, screw it up in height and put it back together.

Tip: unbolt the actual part of the car at one end that the spring sits in - one side will fall downwards, making the spring easily accessible/removable.

Pic of the springs mounts attached and spring mounts circled red.

[V(35)Powarh!]

hi andrew thanks for the tip mate just wanted to know if i move the spring mount up and down will i need to adjust the strut body as well? cheers

[Nightcrawler]

No you don't - the strut sits open at whatever height you set the spring.

[V(35)Powarh!]

Ok cool just one other thing will anything happen if you move the strut body up and down without making any adjustments to the spring mount? Thanks for your help

[Nightcrawler]

You can't move the strut body up or down. Whatever height you set the springs at in their spring mount is the amount the strut will be extended. It goes in and out of the piston at whatever height the springs are set. It does not actually carry any weight - the springs do.

[travm182]

I believe the height is set by the strut and you set the pre load of the spring to match the height.

If you raise the strut by 40mm of thread (by turning anticlockwise), raise the spring by the same amount (40mm). This will maintain the preload that has been set which if its the same as the front it should be 4mm (thickness of the spanner). The preload keeps the springs captive at full droop...

Someone correct me if im wrong.

[Nightcrawler]

Might be so depending on the brand/model, but the set that I had (similar to the Megan Racing ones in the pic) had damper adjustment, but from memory could not be adjusted height-wise.

[s4rl]

correct me if im wrong but the part circle in red goes at the bottom not the top?

[Nightcrawler]

Yeah, that is what I was saying - the spring sits ON the red circled bit - so that is what you adjust up and down.

[V(35)Powarh!]

hey guys yes thats correct i can move my strur body as well i think i may have made a mistake before cause i took it to a mechanic whom just moved the strut body up about 10-15mm hoqwever didnt touch the spring mount to match the strut at all will this do any damage? i hope i can get someone to help- out and make it easier for me to do it is confusing as i havent much knowledge on thes ebut willing to learn.... also with the spring mounts do they sit on the top of the spring or below? as i think i have mine up at the top also took the bump stop out before to make it lower...

[Daleo]

J, sounds like the mechanic is a bit of a dope.
It won't have done any damage; it just changes the stroke of the shock. I'm assuming you paid him, why not get him to do what you asked?

They are at the top, but my concern is this; If you don't know what to adjust, it may be better, and much safer, to leave it to someone with more experience?

Get the car up on some stands so you can look at the job; then decide whether you are confident.

It's not difficult, but you will need to take some accurate measurements to ensure you get it right.

On top of this; a decent height change WILL alter the toe setting, so I'd advise at least getting the alignment checked. It might be easier to just let Pedders do it.