BC coilovers

[JMJ]

I need to add to this thread. I have a 2012 Sedan, R-spec. I got the BC Racing coilovers and this 1" drop is BS. When we installed straight from factory it dropped the car so low the upper control arms hit the fender. It was SLAMMED. This was installed by an experienced guy and he had concerns before we even put them in. They have a 6kg front spring, on a 4200lb car. My buddy was saying they should be 8-10kg. The rears are an 8kg. The dealer I bought them from is going to come inspect tonight because BC says they should be fine. We had to max out the bottom post height to where there is only 1" of threads in the tube, then we had to raise the upper adjustment just to get the car at a reasonable height. The spring is now so compressed that you can't fit a finger in it and it compresses fully on tiny bumps. Pardon my verbage but i'm not a suspension guy, but my buddy is very well versed in it.

When the BC coilover was laid down side by side next to the stock shock/spring, it was significantly shorter. I've been limping the car around and I'm tempted to pull them and go back to stock. BC said a 10kg spring would blow the coilover. A 6kg spring is like a marshmallow supporting a 200lb man. I'll keep you all updated on what happens. FYI the rears appear to be fine, but you can't lower the back without the front unless you want lowrider status.

 

[brfatal]

10kg springs would blow a damper valved for a 6 kg one. You would need custom dampers. 6 kg is too soft for this car.

 

[JMJ]

10kg springs would blow a damper valved for a 6 kg one. You would need custom dampers. 6 kg is too soft for this car.

And that's what BC is saying. They are also swearing up and down that they got it right on the Genesis sedan They screwed up big time. And after reading the forums about Megan Racing, it's clear they either copied BC or BC copied them. Same exact setup, and it's WRONG. I would not recommend BC to anyone after this. My rep is going to go back to them today with pictures to see what they say. Tomorrow the stocks go back in and then back in for an alignment. I'll have to keep looking if anyone makes something functional for my car. Maybe Bilstein? This really is too bad, my car lowered on Vossen CV3's looks pretty damn good.

 

[brfatal]

BC makes Megan Racing's (and many other budget brands') coilovers.

BC BRs are the last coilovers I'd put on a car for anything functionally minded. The single thing they are good for is "moar low" for cheap. If you actually drive the car regularly and expect function and ride quality, look elsewhere.

 

[JMJ]

BC makes Megan Racing's (and many other budget brands') coilovers.

BC BRs are the last coilovers I'd put on a car for anything functionally minded. The single thing they are good for is "moar low" for cheap. If you actually drive the car regularly and expect function and ride quality, look elsewhere.

Got a recommendation? I just want to lower it a bit, but still want the functionality of daily driving. The car has plenty of room for this, that's for sure.

Still waiting to hear from BC. I think they want us to turn the damping all the way up. That's not going to fix a spring that's compressed so much that you can't fit a finger between the rings.

 

[Tailwalker]

Very odd. I had no issues on my GS300 previously. So far the drop has been very minimal on the Genesis, and ride quality is on par with stock. Drop is about 1-1.5". Springs are set to factory recommended preload. Dampening is set to 16 front and 18 rear. No complaints at all.

I had over 100k on my last set of BCs, which is why I bought these. To each their own....

 

[JMJ]

Very odd. I had no issues on my GS300 previously. So far the drop has been very minimal on the Genesis, and ride quality is on par with stock. Drop is about 1-1.5". Springs are set to factory recommended preload. Dampening is set to 16 front and 18 rear. No complaints at all.

I had over 100k on my last set of BCs, which is why I bought these. To each their own....

We checked part numbers and they match what is on the BC website. You have no bumping issues? Here's some pics.

BC "default" setting that claimed only 1". Upper control arms hitting fender.

This is as high as we can get it, spring almost fully compressed.

What it looks like underneath. Nice and compressed.

And the rear, which looks damn good.

 

[Tailwalker]

Wow. Did you make any adjustment to the lower collar? That would be the one closest to the arm. It looks as if you attempted to adjust the ride height with the spring only. If so, that is your issue. Hard to tell, as I do not know what you attempted.

I am higher than you, both front and rear. I will try to get pics, but the fine size is usually too large to let me post from my phone...

 

[brfatal]

I had over 100k on my last set of BCs, which is why I bought these. To each their own....

How often did you send them out for rebuild?

Oi.....

 

[JMJ]

Wow. Did you make any adjustment to the lower collar? That would be the one closest to the arm. It looks as if you attempted to adjust the ride height with the spring only. If so, that is your issue. Hard to tell, as I do not know what you attempted.

I am higher than you, both front and rear. I will try to get pics, but the fine size is usually too large to let me post from my phone...

Yep, we looked at the specs. Per BC, you must have at least 25mm of thread in the bottom perch. We maxed that out, there is only one inch of threads in the bottom perch. That was still too low and we had to start adjusting at the top. Something just isn't right.

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[JMJ]

Wow. Did you make any adjustment to the lower collar? That would be the one closest to the arm. It looks as if you attempted to adjust the ride height with the spring only. If so, that is your issue. Hard to tell, as I do not know what you attempted.

I am higher than you, both front and rear. I will try to get pics, but the fine size is usually too large to let me post from my phone...

Did you just drop yours in and was it a 1-1.5" drop? My drop in from the factory was the first pic

 

[JMJ]

Wow. Did you make any adjustment to the lower collar? That would be the one closest to the arm. It looks as if you attempted to adjust the ride height with the spring only. If so, that is your issue. Hard to tell, as I do not know what you attempted.

I am higher than you, both front and rear. I will try to get pics, but the fine size is usually too large to let me post from my phone...

Oh, FYI. So the front was slammed from factory, the rear was straight up Jeep Rubicon 4x4 status. We had to make a major adjustment to the rear. Polar opposites. It was way higher than factory.

 

[Tailwalker]

I never rebuilt the BC's on my Lexus. I put them on at 90k and removed at 200k. No issue whatsoever, other than the powder coating or whatever coming off the springs. The springs did settle quite a bit though, which is to be expected.

All adjustment was made with the correct preload. The springs are fairly compressed with the full weight of the car, which does make me think that the spring rate could be higher.

 

[xiaphin]

What it looks like underneath. Nice and compressed.

Looks identical to this Megan Coilover install.

http://genesisowners.com/hyundai-genesis-forum/showpost.php?p=114157&postcount=92

Either the installers don't know how to install properly or there is a major design flaw in these coilovers. I would like to see pictures from other users who have installed the Megans and/or the BC's without any issues. I have never seen a coil compressed that much before.

Side note you can get the BC Coils with either a 8k, 10k, or 12k Spring up front. I'm sure you can get the Megans with these spring rates as well since they are basically the same equipment.
---------------------------
Quote from BC rep in my e-mail:

Me:Are there any shock dyno charts available for the valves used in the coilovers for the Genesis Sedan? Also I see that only the fronts can have the Swift spring upgrade and was wondering why this was the case. Look forward to your response.

BC:Each shock is dyno'd and matched to car and the spring rate the buyer chooses.

The rear spring is not a regular linear spring. Its 80mm to 84mm taper. We offer our BC springs in 8k, 10k, and 12k. Swift does not offer a spring at this size.

Thanks,
Chelsea

BC RACING NORTH AMERICA
Monday-Friday, 9:30 AM-5:30 PM EST.
1-321-206-6381 TEL
1-800-741-1972 FAX
----------------------

BC didn't have shock valving charts but here are the two for the Megan coils. They don't have a chart for the rear 44R02 but the rep said it is "For the valving code 44R02, it is similar to the M11. You may view the M11 shock dyno plot that is provided below for you for the 44R02 valving code."

A2

44R02

 

[brfatal]

I never rebuilt the BC's on my Lexus. I put them on at 90k and removed at 200k. No issue whatsoever, other than the powder coating or whatever coming off the springs. The springs did settle quite a bit though, which is to be expected.

All adjustment was made with the correct preload. The springs are fairly compressed with the full weight of the car, which does make me think that the spring rate could be higher.

Play the lottery. Periodic rebuild is a required part of coilover maintenance. Depending on the use and model rebuilds need to be done ever 20,000-40,000 miles. They don't have the lifespan of OE-grade struts and shocks (50-80k miles).

 

[Tailwalker]

Thanks for the heads up. I'll contact BC and see what they recommend.

 

[206rspec]

I just had my BCs installed. It is pretty low! I prefer my cars that low though. I ordered the Swift 10k upgrade, its what was recommended when I called and talked to a tech at BC. It rides really good for being that low. Im still decided on final height/ wheel tire set up, but so far I'm happy with it.

 

[S.Milone]

Yeah that isn't right. Is the bottom perch upside down maybe? I don't know how they bolt on but depending on the style that could be it.

 

[xiaphin]

I just had my BCs installed. It is pretty low! I prefer my cars that low though. I ordered the Swift 10k upgrade, its what was recommended when I called and talked to a tech at BC. It rides really good for being that low. Im still decided on final height/ wheel tire set up, but so far I'm happy with it.

Pics installed and ride height so we can compare to these other photos would be great.

 

[XLevel]

I have sent JMJ a message regarding his coilover install. Hopefully, he is all good now.

ATTN EVERYONE: PLEASE PLEASE PLEASE make sure your installer is knowledgeable, experienced, and comfortable with aftermarket parts before he/she does any work on your vehicle.

If your installer is having doubts, there is a reason. BIG RED FLAG! Sometimes this could be a legit concern if you purchased junk, but if you purchased a reputable product, he likely doesn't know what to do.

Many qualified mechanics, even ASE Master Techs, are not experienced with aftermarket parts and have caused many of the issues we encounter. This includes everything from high flow cats to coilovers.

DO NOT take their word for it or believe your lying eyes. Just because he has high-end cars come through and have many happy customers, doesn't mean he knows that type of part. To be safe, ask if he has installed a similar product for another customer and talk with that customer if possible. If they can't provide references, find a new installer.