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BC Racing Coilovers (fitted on page 3)

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Gustavo7
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Pulled the trigger on a set of BC Coilovers

Post by Gustavo7 » Wed Jan 17, 2018 11:33 pm

So Today I have installed... the fronts only :lol: :lol:

Front coilovers, ARB bushes and end links. Replaced all bolts too with new items that BMW kindly provided in exchange of £54 :D

Only started at 12 and it took me six hours. Mind it was the first time I did this sort of job.

Well, having only done half a job gave me the opportunity to compare the front coilovers vs the original rear suspension. Adjusted the damper to 14 out of 30 settings to start with (0 being soft, 30 being hard).

The car rode very well in the front, not bumpy, not crashy. Reacted well to road imperfections, pot holes and speed humps. Better than the rear suspension (which is tired to be fair) and better than I ever thought it would. Did hear two very shy clunks going over two deep potholes. (Intentionally ran ober them) Also noticed what people refer to as NVH (noise, vibration and harshness) due to the solid mounts, but nothing really invasive or disturbing! Some of it might even go away once I get the geometry right and an alignment done.

On the way home, near my local town (Brentwood) I pulled over to turn the knobs to full soft before entering the high street (which is partially cobbled). I was positively surprised with:

1. How the feedback through the steering wheel was so much nicer and smooth than before.
2. How soft the suspension was! It absorbed those cobblestones so well it reminded me of my 320d SE :lol: Don’t think I will ever set it to zero again, but nice to know the adjustment knobs really do their job ahah

Did not try full hard, think it will be stupidly stiff for the road anyway :lol:

So there you go, this is my non-conclusive front-suspension-only First Impression.

It’s promising, now I need to find time to fit the rears...
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Imola Red Z4MC

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wspohn
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Pulled the trigger on a set of BC Coilovers

Post by wspohn » Wed Jan 17, 2018 11:41 pm

I found that only about 5 clicks off soft worked on my Solstice (10 clicks on the rear).
Vancouver BC, Canada
2007 Z4MC
2009 Solstice GXP coupe
1962 MGA Coupe
1956 MGA (rebody+re-engined)
1958 MGA Twin Cam race car
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Theivz
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Pulled the trigger on a set of BC Coilovers

Post by Theivz » Thu Jan 18, 2018 1:58 pm

look awesome - cant wait to hear feedback

i have run these on last 2 cars owned including my e89 and i loved them. easy to dial to firm for track and easy to put back. just need a jack for rear. 1 small bit of feedback if u dont mind ... ask installer to make sure H <--> S sign visible once installed (rear) :thumbsup:

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BMWZ4MC
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Pulled the trigger on a set of BC Coilovers

Post by BMWZ4MC » Wed Jan 31, 2018 11:55 pm

Beedub wrote: Fri Nov 17, 2017 9:00 pmMy kWs still look brand new, which id expect as they dont see much use, they have been used in anger many many times however, kw offer great rebuild service with quick turn arounds.
Beedub, do you know what is the approximate turn around time? I’m considering having mine serviced before I ship my car to Aus, simply because it’s going to be ball ache from the other side of the world.
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Z4MC - heavily fettled for track use
Lotus Exige - sensible daily driver on the mods slippery slope
Westfield SEiW - in hibernation
Modified RS4 Avant - back in Blighty
S2000 GT - gone

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wspohn
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Pulled the trigger on a set of BC Coilovers

Post by wspohn » Thu Feb 01, 2018 12:03 am

BMWZ4MC wrote: Wed Jan 31, 2018 11:55 pm I’m considering having mine serviced before I ship my car to Aus, simply because it’s going to be ball ache from the other side of the world.
You are closer to the factory (Taiwan) and it would probably be quicker and easier to deal direct from Oz. I bought direct from Taiwan to Canada.
Vancouver BC, Canada
2007 Z4MC
2009 Solstice GXP coupe
1962 MGA Coupe
1956 MGA (rebody+re-engined)
1958 MGA Twin Cam race car
1972 Jensen Interceptor

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Beedub
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Pulled the trigger on a set of BC Coilovers

Post by Beedub » Thu Feb 01, 2018 12:06 am

BMWZ4MC wrote: Wed Jan 31, 2018 11:55 pm
Beedub wrote: Fri Nov 17, 2017 9:00 pmMy kWs still look brand new, which id expect as they dont see much use, they have been used in anger many many times however, kw offer great rebuild service with quick turn arounds.
Beedub, do you know what is the approximate turn around time? I’m considering having mine serviced before I ship my car to Aus, simply because it’s going to be ball ache from the other side of the world.
i was quoted 2.5 weeks from when they arrive at the factory, which isnt bad at all imo.... if you need any further info drop a line, im not on the forums very much now days , a new business startup which is taking up all my time .
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Pulled the trigger on a set of BC Coilovers

Post by BMWZ4MC » Thu Feb 01, 2018 12:09 am

Cheers guys :thumbsup:
Thought you’d not been around much Beedub. Good luck with the new business.
Image
Z4MC - heavily fettled for track use
Lotus Exige - sensible daily driver on the mods slippery slope
Westfield SEiW - in hibernation
Modified RS4 Avant - back in Blighty
S2000 GT - gone

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tjlazer
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Pulled the trigger on a set of BC Coilovers

Post by tjlazer » Sat Feb 03, 2018 6:14 pm

What's the verdict on the BCs then OP?
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Ed Doe
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Pulled the trigger on a set of BC Coilovers

Post by Ed Doe » Sat Feb 03, 2018 8:25 pm

Very keen to hear the verdict too on these - I'm coming from B12s and looking at something fairly daily friendly that will work on tracks occasionally. Aware these are more of a budget coilover but as previously the various good reviews from m3/5 owners have to mean something!

Just to add to this having thought at some length this evening - could you set them up full hard and let us know how firm it is :lol: I'd like to know there's enough range of adjustment to manage some track work as well as being sensible for road use if poss!! :)
Gustavo7 wrote: Tue Jan 16, 2018 8:33 pmWell, tomorrow is the big day. I’m going to fit these bastards! :thumbsup:

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Also - in the last pic above, you have the coilovers, and adjustable droplinks and what looks to be adjustable rear camber arms - do these come with the BC Coilovers, or did you purchase from Powerflex or similar? Keen to know as I'd like that additional adjustability too, and it's deffos another big plus for the BC Kit if they come with!
Carbon Black '07 M Coupe: Intrax 1k2 Coilovers, AP-Racing, Raybestos ST45s, Tillets, Schroth, Vibratechnic, Apex EC7, Strongstrut, Eventuri, H&S, RTD, 4.1FD :evil:
Silver Grey '06 3.0si Coupe - SOLD :(

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Gustavo7
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Pulled the trigger on a set of BC Coilovers

Post by Gustavo7 » Mon Feb 05, 2018 12:30 am

The rear camber arms (and the adjustable front end links) were a separate purchase to the coilovers. The rear camber arms are the Powerflex ones.

I have unfortunately been unable to drive and work on the car in the last couple of weeks as I have been recovering from an emergency surgery. There were 75% of chances it would require further intervention. - It does, so I’m now sorting paperwork for a second operation which shall take place next week.
I personally don’t think I will be driving the Z4 before March. And that’s probably the best case.

So bear with me, I will provide all the feedback in the world once I’m fit to drive 👍
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abar121
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Pulled the trigger on a set of BC Coilovers

Post by abar121 » Mon Feb 05, 2018 2:30 pm

Hi Gustavo,
Best wishes for the recovery and second operation.

I know how this feels, I was ill pretty much the day I got my zed (actually must have been several months before..) and unable to drive it for several months.

I would love to have a ride in it when all is good. I'm looking at changing my suspension at some stage.

Cheers, Alan.
'07 Z4M Interlagos Blue. All options except extended leather.

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Ed Doe
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Pulled the trigger on a set of BC Coilovers

Post by Ed Doe » Mon Feb 05, 2018 6:04 pm

Sorry to hear that chap - wishing you the very best for a speedy recovery!

If it's any consolation I nearly lost my leg below the knee in a climbing accident - 6 ops and 5 months on crutches later I was thankfully able to still drive - feels like forever but its the best feeling in the world when you do finally make it back in the car!
Carbon Black '07 M Coupe: Intrax 1k2 Coilovers, AP-Racing, Raybestos ST45s, Tillets, Schroth, Vibratechnic, Apex EC7, Strongstrut, Eventuri, H&S, RTD, 4.1FD :evil:
Silver Grey '06 3.0si Coupe - SOLD :(

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Pulled the trigger on a set of BC Coilovers

Post by brillomaster » Tue Feb 06, 2018 9:37 am

somewhat tempted by some BC coilovers... I do do trackdays so would likely go for the harder springs, but budget wont stretch much past these. Plus really need something with adjustable front camber, want to be running -3 deg at the front or so.

will be keen to hear how you get on with these when they're all on and set up, wishing you a speedy recovery from surgery!

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Pulled the trigger on a set of BC Coilovers

Post by Gustavo7 » Sun Apr 22, 2018 7:16 pm

Update:

The Zed is off to Scotts Performance Cars in Dartford to get the rear suspension, powerflex bushes, RTABS and adjustable camber arms fitted together with a 4 wheel alignment.

Any advice on suspension geometry for a road car? I’m inclined to start with the z4m original geometry and play it from there...
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Ed Doe
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Pulled the trigger on a set of BC Coilovers

Post by Ed Doe » Mon Apr 23, 2018 9:19 pm

Go for the E46 M3 CSL alignment - makes for a LOVLEY drive :driving:
Carbon Black '07 M Coupe: Intrax 1k2 Coilovers, AP-Racing, Raybestos ST45s, Tillets, Schroth, Vibratechnic, Apex EC7, Strongstrut, Eventuri, H&S, RTD, 4.1FD :evil:
Silver Grey '06 3.0si Coupe - SOLD :(

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