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BC Racing Coilovers - Comprehensive Review
- Thread starter Honcho
- Start date
Is Circuit Motorsports still the best place to procure the BC coilovers with Swift springs? They are currently quoting $1320 for a set. Just asking before I pull the trigger. Thanks again!
They can be a bit squeaky prior to warm up. If your in a warmer climate it may not be an issue. 1 thing I would recommend checking prior to bolting them on is tightening or checking the pillow ball nut. Mine shipped out loose in the rears. After bolting them up there was a clunking noise. Quick easy fix but would have been easier checking it prior to installation. I had to remove the rear hatch garnish to get to it.... You need to remove the adjuster knob, use an Allen key, and a 14mm wrench to tighten.
I would also measure each shock from the lower portion of the top mount to the lower spring perch to make sure it is all matching spec. My spring preload was all off when receiving my own set. Nothing to worry about. Just far easier to check on a bench versus on a car.
I guess I never followed up to say how it was going with my BCs. I've had them on for a couple years now and no trouble. Pic is of me schooling all at the 2015 NSXPO autocross with my BCs and I still had them on the street settings. Swift springs 10/8.
I can't recall ever seeing a dyno plot for the BC coilovers. I find it frustrating that this type of info is not generally available but they were able to send me this as a representative sample of the standard NSX setup:
[MENTION=16375]Dhalsim[/MENTION], in that picture you are literally lying on the ground.Your rockers panels are at sea level. Man, I always wondered how nsx's that were so low were even drivable. Congrats for making it happen. After lowering my car, it came with a bunch of associated issues. But I always said, the BC on flat roads were killer... You should share more of your set up here.
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Hope many BC buyers learn to read this graph.
you folks who track on BC's are great drivers. Just imagine how much faster you'd be on dampers that are halfway decent.
you folks who track on BC's are great drivers. Just imagine how much faster you'd be on dampers that are halfway decent.
I can't recall ever seeing a dyno plot for the BC coilovers. I find it frustrating that this type of info is not generally available but they were able to send me this as a representative sample of the standard NSX setup:
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I wouldn't dare say I'm an expert but the easiest is to compare with dampers generally accepted to be of good quality. I'll post on my thread my shock dyno from the JRZs. Hope some one post one for the KW v3s
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Interestingly enough Fortune Auto has a decent intro article about understanding shock dyno graphs here. They aren't known to have shocks much different than the BCs.
They explain the difference between slow speed vs high speed and digressive vs. like linear or other.
http://www.fortune-auto.com/shockdynobasics.htm
There's also a decent few youtube videos.
Just like Jason, is love to debate this topic using shock dynos.
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Interestingly enough Fortune Auto has a decent intro article about understanding shock dyno graphs here. They aren't known to have shocks much different than the BCs.
They explain the difference between slow speed vs high speed and digressive vs. like linear or other.
http://www.fortune-auto.com/shockdynobasics.htm
There's also a decent few youtube videos.
Just like Jason, is love to debate this topic using shock dynos.
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If it's another 4+ yrs of Hillarybama don't hold your breath. Nothing will happen lol
(My sole purpose in life is to get Roger to get rid of his crappy coilovers)
(My sole purpose in life is to get Roger to get rid of his crappy coilovers)
I am glad mine found a new home. I never quite got the whole buzz about them. Hated em from day 1. But glad someone is happy with them.
Man that FB thread on that guy who just bought a set of BCs is out of control. I'll give you props Regan cause you mostly know what the hell you're talking about but have you actually ever used the BCs? Is your opinion based on hypothetical or real world?
Looks like there are several people on FB that wrote their doctoral thesis on coilovers but like most dont have any actual real world experience yet their opinions (to them) are gospel because....well......they heard they were made in Taiwan so how can they be any good..........or a friend of a friend said they were shitty.
Everyone has their opinions.....some are based on real world experience and some are based on what they heard....read....etc.
Although I know who you are and do value your opinion even if its not based on "real world" experience, most of the time if someone hasn't actually used the product they're disparaging than I don't really value their input.
Also just to add I dont think I have ever said that BCs are the greatest, best, whatever. I know there are better coilovers like the elitist JRZ but I will not back down from the opinion that BCs are one of the best bang for the buck coilovers out there and my "real world" experience trumps all the armchair racers opinions AFAIC.
BTW - I will eventually buy some KWs and then I will be able to compare based on my actual use of both products and not some graph or what my buddy heard.
Appreciate your feedback. I'm only giving you a hard time because you equally dish it out to me too (and I actually really enjoy the banter because I consider you a friend first and foremost).I think we've killed this topic on Facebook. I'll suffice to say, all opinions, including mine are subjective and heresay. However, [MENTION=28830]jwmelvin[/MENTION] and I are the only ones who are attempting to use data to support our findings.
Even though I don't have BC coilovers I'm going to have to side with @Dhalsim and here is why. On my first day in electronics school the teacher said I will teach you theory but reality is when you turn on the power and then sometimes theory goes out the door. The same can apply here. You can have all the data about an item but until YOU have driven a car with it on it's all just data (theory). And even after driving a car with a new item opinions about it are all subjective from one person to the next, you may like it but others may not.
BTW That teacher was by far the best teacher I ever had. Had more been like him I would have got a lot more from school than I did.
BTW That teacher was by far the best teacher I ever had. Had more been like him I would have got a lot more from school than I did.
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Cool! Another one to join the party.OK.. so answer me this... In your example you're using theory (not data). BIG DIFFERENCE. Thinking about how a coilover may perform and making opinions based on your butt dyno is essentially a derivative of theory and subjective heresay. There's no way to imperically compare in any meaningful way one's butt dyno vs. another. Except, I can tell you my butt is probably bigger than yours, which is actually a sad fact, not theory. Putting a BC coilover on a dyno and plotting data points is not theory. It is data. It's just like turning on the power.. which like you said theory goes out the door. Try again Les
Who wants tacos?
I agree with [MENTION=20915]RYU[/MENTION] that the shock-dyno plot should reveal at least certain characteristics that are apparent from driving. I am interested in understanding how the two correlate. What the shock dyno lacks is any reflection of the spring rate, which obviously has a huge subjective effect. I think one reason more-sophisticated dampers can be more comfortable for street use is that they can run lower spring rates, e.g. the KWv3, and still maintain good control of wheel motion with the damper. Also, I suspect the high-frequency behavior can be quite different (one wants low damping at high frequencies, so that the spring can isolate the car from vibration).
When I bought my car from Honcho, there was a clicking/slight knocking noise coming from the right front. He disclosed it in his punch list and said it was most likely either the steering rack (requiring NSX-SA's knock bush fix) or coil slap from the right front BC. When the car was at Ben's over the winter getting all manner of work done, he replaced the steering rack-to-frame bushing and installed the knock bushing. The noise is still there so my guess it's coil slap. Annoying as hell.
I guess I'm the one "writing a Ph.D." on the Facebook page "without actually having driven on them". The "Facebook guy" was upset he didn't have more clear info before he bought. If you just street drive your car on some weekends and want a better look then the BC will be just fine. If you're serious about performance you need to get something else and you will need to spend more money. That's the short version of the story. After this post I'm bailing out because I have no desire to engage in back and forth arguments.
Cool! Another one to join the party.OK.. so answer me this... In your example you're using theory (not data). BIG DIFFERENCE. Thinking about how a coilover may perform and making opinions based on your butt dyno is essentially a derivative of theory and subjective heresay. There's no way to imperically compare in any meaningful way one's butt dyno vs. another. Except, I can tell you my butt is probably bigger than yours, which is actually a sad fact, not theory. Putting a BC coilover on a dyno and plotting data points is not theory. It is data. It's just like turning on the power.. which like you said theory goes out the door. Try again Les
You missed the point I and probably [MENTION=16375]Dhalsim[/MENTION] were trying to make.
My point was that data or theory are all fun to look at and talk about but your butt dyno is all that really matters when you are driving a car with a new item. I said sometimes theory goes out the door just like data can as there can be other factors that can change the results.:wink:
Also I did not say that data and theory are the same thing but I would like to have a discussion on your Big Difference comment but not from behind a keyboard and not on a car forum. You know how to reach me.:smile:
People just have to be realistic about their expectations. A $1000 coilover system will fit your needs if want to lower your car and have better performance then say cut springs on 100k-mile worn stock shocks.
Les real world results and driver experience can trump faulty data, yes. But that's not how things work. You start with measurable things and use a scientific process, then you hand it to a professional driver in a race car driving at the track and get his feedback. Are you suggesting people should go and buy BC based on various NSX owners' butt dynos? I can put more weight on data being wrong if these go on an NSX Billly Johnson tests around COTA and returns with feedback on the pluses and minuses.
