Koni Yellow Right Rear Damaged
I realized yesterday that it wasn't just the ground slant and the bag of tools in the back that the Koni yellow strut was damaged also. I order up a set of KYB excel-g and they will be here in a few days (temporary).
BC Racing BR Coilovers
I also ordered up BCracing BR coilover default spring rates (daily driving). I also paid for front Swift springs (not to be confused with our car these are the Japanese spring company; it appears that they don't offer the swift spring for the rear. This is most likely because our rear struts and springs are divorced (not one piece). All the Swift springs from BCracing our 62 mm inside to fit their coilover struts.) These will take 4 to 6 weeks to show up. They do sell DS, RM coilovers but upon research realized for daily neither one was going to be proably good ideas. The DS I gathered is only different from the BR in the low speed strut being digressive and not linear (faster low speed response). The RM inverts the piston (larger on top) which can have performance pluses but not recommended for daily driver sense they a prone to failure quicker then the other way around and require rebuilding more often.
Swift Springs
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What is special about Swift Springs?
What makes Swift special is their unique construction and precision design. They are engineered to stay consistent under heavy loads, unlike many standard springs that can fatigue or change rate.
BC Racing Swift Spring upgrades improve suspension communication, steering feel, and traction. Their lightweight design reduces unnecessary strain, allowing the coilovers to perform well in both everyday driving and competitive environments, making them highly valued by performance drivers.
What is the difference between Swift Springs and regular springs?
The main difference is in weight, durability, and performance. BC Swift Springs are made from a proprietary alloy that allows thinner coils without sacrificing strength. This reduces unsprung weight, giving coilovers quicker response and more predictable handling.
Regular springs often lose consistency over time, but Swift maintains a linear spring rate. Many enthusiasts choose to pair BC Coilovers with Swift Springs because they deliver both comfort and performance, unlike traditional suspension springs.
Can Swift Springs make your car faster?
While a Swift upgrade does not increase horsepower, these springs can improve lap times and driving speed by enhancing suspension efficiency. The springs allow the car to maintain better contact with the road, providing more grip in corners and stability at high speeds. By reducing weight and improving suspension response, these springs give drivers the ability to carry more speed safely through turns, making cars feel quicker and more controlled.
Where are Swift Springs made?
Swift Springs for BC Coilovers are manufactured in Japan, where the company has more than 90 years of spring engineering expertise. This heritage ensures that every upgrade is built to exacting standards of quality and durability. Japanese production techniques focus on precision and consistency, which is why these products are trusted worldwide. Enthusiasts value these springs as a reliable upgrade built for long-term performance. " (SpringRates, found on their faq pages.)
I bought through Springrates.com (they have a section of their site that is bcspringrates) them because they are cheaper then ordering direct through the BCRacing, and they have the ordering system setup no to charge you customization fee ($150 something) for adding Swift Springs, and they knew that you could not order the rears (which again would charge you another $210). You can order Swift spring through them; they cannot justify adding $150 to something they sell separate. For the rears I will compare the BCracing standard spring with the length and diameter of my H&R springs. If the H&R is the same diameter and length I could go with either or for the spring. H&R doesn't ever list their spring rate while Bcracing default spring rates is what ever you order. I went with the softest set for daily driving for the Swift springs for the front 4K, but for a reasonable amount of money I can order a higher spring rating for a 62 mm inside/178 mm length Swift spring (example 5K to 10k for around $240 for a set of two). Looking at the specs from their website you can see that the our rears should be 104 mm inside diamete & a length of 96 mm. However, the spring rates are listed wrong. I believe the rears standard spring rates is 5K.
Features for BR Series BCRacing Coil Overs
- 30-level simultaneous compression/rebound damping adjuster
- Mono-tube damper with linear piston and hardened chrome shaft
- Ride height adjustable independent of spring preload
- Upper mount hardware varies by chassis — camber plates, pillowball, or reused OEM mounts. See the Specifications table for what's included on your kit.
- Swift Spring and custom spring rate upgrades available at checkout
- Custom damper valving paired with custom spring rates on request
- Fully rebuildable — replacement parts available from BC for the life of the shock
- 2-year manufacturer warranty against defects
Specifications
| Part Number | L-18-BR |
| Part Name | BR Series Coilovers |
| Vehicle | 1988-2003 Suzuki Swift |
| Drivetrain | FWD |
| Chassis Code | SF |
| Damping Adjustment | 1-Way (30 levels) |
| Ride-Height Adjustable | Yes |
| Spring Rate - Front | 4 kg/mm |
| Spring Rate - Rear | 180 kg/mm |
| Spring Size - Front | 62-180-4K |
| Spring Size - Rear | 104-96-180K |
| Swift Springs - Front | 62-178-X |
| Camber Plates - Front | Included |
| Camber Plates - Rear | Not Applicable |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | Divorced |