Guys with BC coilovers - need help!!
#1
Guys with BC coilovers - need help!!
So I'm in the middle of installing my BC Racing coilovers. I wanted to check and see if everyone preloaded the springs about 1/4" according to the write up on BC Racing (which I got off the G37 site...)
http://www.bcracing-na.com/G37install.htm
Also, there are quite a few guys complaining about a clunk or knocking noise when going over bumps. Anyone having these problems?
Also, did your rear springs come with a gold perch piece which sits in the lower spring bucket? See the attached pic. Mine didn't and I'm wondering if it should have....
http://www.bcracing-na.com/G37install.htm
Also, there are quite a few guys complaining about a clunk or knocking noise when going over bumps. Anyone having these problems?
Also, did your rear springs come with a gold perch piece which sits in the lower spring bucket? See the attached pic. Mine didn't and I'm wondering if it should have....
#2
Originally Posted by 05GRide
So I'm in the middle of installing my BC Racing coilovers. I wanted to check and see if everyone preloaded the springs about 1/4" according to the write up on BC Racing (which I got off the G37 site...)
http://www.bcracing-na.com/G37install.htm
Also, there are quite a few guys complaining about a clunk or knocking noise when going over bumps. Anyone having these problems?
Also, did your rear springs come with a gold perch piece which sits in the lower spring bucket? See the attached pic. Mine didn't and I'm wondering if it should have....
http://www.bcracing-na.com/G37install.htm
Also, there are quite a few guys complaining about a clunk or knocking noise when going over bumps. Anyone having these problems?
Also, did your rear springs come with a gold perch piece which sits in the lower spring bucket? See the attached pic. Mine didn't and I'm wondering if it should have....
If you have the newer springs(:Progressive) that are kind of fat in the middle you don't need the lower bucket according to Pete@BcRacing.
No clunking sound here.
I adjust springs first and then adjust the shock body until it gets tight or vice versa.
Remember you don't want slack on your springs cause that means that you will be riding on more shock than spring and can blow out your shock body.
#3
#4
Originally Posted by 05GRide
So I'm in the middle of installing my BC Racing coilovers. I wanted to check and see if everyone preloaded the springs about 1/4" according to the write up on BC Racing (which I got off the G37 site...)
http://www.bcracing-na.com/G37install.htm
Also, there are quite a few guys complaining about a clunk or knocking noise when going over bumps. Anyone having these problems?
Also, did your rear springs come with a gold perch piece which sits in the lower spring bucket? See the attached pic. Mine didn't and I'm wondering if it should have....
http://www.bcracing-na.com/G37install.htm
Also, there are quite a few guys complaining about a clunk or knocking noise when going over bumps. Anyone having these problems?
Also, did your rear springs come with a gold perch piece which sits in the lower spring bucket? See the attached pic. Mine didn't and I'm wondering if it should have....
#5
Originally Posted by SDGeneralCounsel
Ummmm, there is a rubber part for the bottom part of the spring holder (the gold part). You need to place the rubber bottom mount from the original springs onto the gold part. I screwed this up and heard the bumping noise that you are describing, so that is probably your problem.
#6
FYI just got this Email from Adam over at z1 auto.. Thanks Adam!
"Keith - just spoke to BC, and they said all of the newer kits (recently) all are retaining the stock rubber piece now. The "older" setup used different diameter springs, so they had to include that large gold piece. But they said they are using newer diameter springs now, which retain the std. rubber piece. No changes to the spring rates"
So the newer kits with the fatter springs just have a different diameter so they don't need to use the gold piece. Apparently not progressive either.
"Keith - just spoke to BC, and they said all of the newer kits (recently) all are retaining the stock rubber piece now. The "older" setup used different diameter springs, so they had to include that large gold piece. But they said they are using newer diameter springs now, which retain the std. rubber piece. No changes to the spring rates"
So the newer kits with the fatter springs just have a different diameter so they don't need to use the gold piece. Apparently not progressive either.
#7
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#9
Originally Posted by Gilley
I need to get the new springs then. I have the gold piece and there is some clunking every now and then.
the stiffer suspension setup.
Revalved Shock body
Spring Rate 14K front and 12K rear
Even when I had the standard setup i never had clunking.
Gilley check that your spring doesn't have too much play.
If anything try tightening up the shock body in the rear
so it creates more spring compression.
#11
Originally Posted by Klubbheads
I do have the gold piece with the "narrow" springs and have not noticed any clunking from that area. ![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
#13
The "clunking" issue seems to be a pretty big deal in the G37 community. I'm not sure if the suspension was completely redesigned, if there are different rear spring buckets, etc. But there are quite a few complaints about the BC kit on the G37.
14K and 12K? That's a pretty stiff setup there!
14K and 12K? That's a pretty stiff setup there!
#14
Originally Posted by Klubbheads
I did not use the stock rubber part. The gold part is directly sitting on plate.
#15
that is interesting.... because i have not noticed any kind of noise especially from the rear. I have had the whole suspension checked out by a guru and everything seemed fine.
I wonder what the instructions say... do we have to use the stock rubber mount or not?
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
Last edited by Glex25; 07-03-2008 at 05:16 PM.