BC Racing Coilover install and review - BMW M5 Forum and M6 Forums
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post #1 of 133 Old 12th February 2011, 05:44 AM Thread Starter
timmay77
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BC Racing Coilover install and review

I purchased my BC Racing Coilvers (Type BR, 8k/6k spring rates) from Tristan at Circuit Motorsports. Great guy to deal with. I also purchased the rear extenders for the damping controls. I installed the rears first, the harder of the 2 to do. If you remove the fender liner, it really isn't THAT bad. You just have to remove the caliper, take the upper rear trailing arm loose from the knuckle and disconnect 1 plug to slide the shock/spring assembly out. The fronts are SO EASY it isn't even funny. Once I get the ride heights at all 4 corners squared away, I will do a full review. I am starting my dmapening setting with 10 clicks from full soft in the rear and 15 clicks from full soft in the front.

PS: I am sorry my fender wells aren't as clean as your's Steve. I am sure I could eat a $50 steak off of them if I went into your garage right now......LOL

Rear install:












Rear extender install, you can see where I intended to put the extender knob out through the speaker grill but it bent the cable too much that you couldn't feel the "click" of the settings, so I had to move it up a little. I will just source some new speaker grills to take care of that hole.

















The New Whip:
2003 Sterling Gray/Executive Caramel ///M5 (Name TBD)
~Coming soon! 5.3 LS Twin Turbo Swap. Just another LS swap, but with 2 snails.

The Storm Trooper:
2014 328i xDrive Msport Alpine White/Black Dakota (fully loaded)

~Bootmod3 stage 2~ER Downpipe~ER Charge pipe~BMS Intercooler~351M wheels

Tim ~ email: HallmanTL (at) gmail (dot) com

Last edited by timmay77; 12th February 2011 at 06:33 AM.
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post #2 of 133 Old 12th February 2011, 06:04 AM
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post #3 of 133 Old 12th February 2011, 06:27 AM Thread Starter
timmay77
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Fronts. The only thing I have to gripe about is this:

The manual is HORRIBLY translated. Good Lord is it bad.

Also, in the first picture, this nut is difficult to get on and tighten as you have to use an open end wrench due to the flare of the shock body. No big deal, just be aware of it. You have to thread it on as the ball joint threads are pushed through.











Here you can see the clearance of 9.5" OEM rear wheels on the front. These pictures are taken with the car fully on the ground.

3mm spacer


10mm spacer

The New Whip:
2003 Sterling Gray/Executive Caramel ///M5 (Name TBD)
~Coming soon! 5.3 LS Twin Turbo Swap. Just another LS swap, but with 2 snails.

The Storm Trooper:
2014 328i xDrive Msport Alpine White/Black Dakota (fully loaded)

~Bootmod3 stage 2~ER Downpipe~ER Charge pipe~BMS Intercooler~351M wheels

Tim ~ email: HallmanTL (at) gmail (dot) com

Last edited by timmay77; 12th February 2011 at 06:28 AM.
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post #4 of 133 Old 12th February 2011, 07:54 AM
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post #5 of 133 Old 12th February 2011, 08:25 AM
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Very nice. Have you had a chance to drive it around?

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post #6 of 133 Old 12th February 2011, 10:43 AM
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nice pictorial write up! I should add that in your pics the spring perch collar screws are seperated, the ones at the lower ends of the springs. from my recollection they need to be tightened together to stop the spring working loose. the lower most (gold coloured) shock body collar is the one that gets undone in order to adjust ride height

Last edited by wkd928; 12th February 2011 at 10:46 AM.
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post #7 of 133 Old 12th February 2011, 11:23 AM
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Timmay.

I too have the extenders and was wondering if you could put them anywhere through the speaker grilles.

Obviously the corner is a no no but do you think you could do it more central in the grille, perhaps where you have positioned the holes in the shelf but a little further back so as they are on the very front edge of the grille??

I was going to do that, or leave them in such a way as they are tucked under the grille itself and i could simply unclip the grille for access to the extender.

Having done the job now do you think any of that is possible as i want to leave the shelf unless its a last resort???

Oh, as a final point, did you undo your hub nut/bolt that clamps the front shock to the hub okay, or was it a PITA??

Thanks

Jay
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post #8 of 133 Old 12th February 2011, 11:24 AM Thread Starter
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Quote:
Originally Posted by M55555 View Post
Very nice. Have you had a chance to drive it around?
Not yet, still adjusting ride height.

Quote:
Originally Posted by wkd928 View Post
nice pictorial write up! I should add that in your pics the spring perch collar screws are seperated, the ones at the lower ends of the springs. from my recollection they need to be tightened together to stop the spring working loose. the lower most (gold coloured) shock body collar is the one that gets undone in order to adjust ride height
Correct. I was in the middle of making adjustments when I remembered to snap a few pictures........


I did notice that when I was making my adjustments, as descibed by, well, everyone, the spring collars came loose that preload the spring, which they shouldn't have. My method of adjustments will be to loosen all 3 collars, adjust threaded collar to desired ride height, preload the spring with the upper collars to 5mm (thickness of the wrench), tighten top collars, then tighten the lower collar. That way I know FOR SURE that I have 5mm of preload on my spring.

The New Whip:
2003 Sterling Gray/Executive Caramel ///M5 (Name TBD)
~Coming soon! 5.3 LS Twin Turbo Swap. Just another LS swap, but with 2 snails.

The Storm Trooper:
2014 328i xDrive Msport Alpine White/Black Dakota (fully loaded)

~Bootmod3 stage 2~ER Downpipe~ER Charge pipe~BMS Intercooler~351M wheels

Tim ~ email: HallmanTL (at) gmail (dot) com
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post #9 of 133 Old 12th February 2011, 11:28 AM Thread Starter
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Quote:
Originally Posted by jamiepeers View Post
Timmay.

I too have the extenders and was wondering if you could put them anywhere through the speaker grilles.

Obviously the corner is a no no but do you think you could do it more central in the grille, perhaps where you have positioned the holes in the shelf but a little further back so as they are on the very front edge of the grille??

I was going to do that, or leave them in such a way as they are tucked under the grille itself and i could simply unclip the grille for access to the extender.

Having done the job now do you think any of that is possible as i want to leave the shelf unless its a last resort???

I am sure it could be done, but I am not sure you would be able to feel each "click" of the adjuster. Where I had mine it worked, just not the way it was intened too. Look at the picture with the speaker enclosure mounted. You will have to go around that to get where you want to go. That will be your issue.....

Oh, as a final point, did you undo your hub nut/bolt that clamps the front shock to the hub okay, or was it a PITA??

I had no problems at all. I had each shock/spring assembly replaced in literally 10 min. SUPER easy.

Thanks

Jay
Noted.....

The New Whip:
2003 Sterling Gray/Executive Caramel ///M5 (Name TBD)
~Coming soon! 5.3 LS Twin Turbo Swap. Just another LS swap, but with 2 snails.

The Storm Trooper:
2014 328i xDrive Msport Alpine White/Black Dakota (fully loaded)

~Bootmod3 stage 2~ER Downpipe~ER Charge pipe~BMS Intercooler~351M wheels

Tim ~ email: HallmanTL (at) gmail (dot) com
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post #10 of 133 Old 12th February 2011, 01:52 PM
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Seems to be a lot of BC action going on lately..............can you confirm that the shock clamp of the wheel carrier is threaded as well as having the lock nut on it, I got the nut off ok, but the bolt is uber tight, I was fearing some internal organ displacement as I was proper hanging off it to get it to budge, soaked in penetrating fluid over night and am going to get a heat source if it still wont budge, I found the rears flew on, albeit with the extra work of the shelf and that but no hassles from the rear, front have been another story..........like your plan to set them up, whats the mileage on your car, what did you think of all the control arms, wishbones etc etc, mine all look OK but its got 110k on it so am considering swapping them out for new but its not cheap............

Mike

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