RBF 600 vs 660: Which Brake Fluid Reigns Supreme for Track Days?

Parts and Accessories
1

When it comes to optimizing your vehicle’s braking performance, the choice of brake fluid can make a significant difference, especially if you’re hitting the track or racing. I am considering upgrading my brake fluid, and I’ve narrowed it down to two popular options: Motul RBF 600 and Motul RBF 660. But I’m trying to figure out which one is better suited for high-performance racing and overall reliability.

Performance and Temperature Ratings

Both RBF 600 and RBF 660 are designed for the rigors of racing, but they have distinct properties:

  • RBF 600:
    • Dry boiling point: 312°C (593°F)
    • Wet boiling point: 216°C (421°F)
  • RBF 660:
    • Dry boiling point: 335°C (635°F)
    • Wet boiling point: 245°C (473°F)

As you can see, the RBF 660 has a higher dry and wet boiling point, which makes it more resistant to vapor lock during intense braking situations. For those of us who push our vehicles to the limit, this could be a crucial factor.

Maintenance and Longevity

Another aspect to consider is how often you’ll need to change the fluid. From discussions I’ve read, RBF 660 tends to absorb moisture slightly slower than RBF 600. This could mean longer intervals between flushes, which might be appealing on busy weekends.

Price Consideration

Price may also be an important factor. Typically, RBF 660 comes at a premium due to its enhanced performance. For a budget-conscious racer like me, I’m weighing whether the extra cost is justified.

Recommendations

I’ve heard various opinions:

  • Some experienced racers swear by RBF 660 for any serious track day.
  • Others suggest RBF 600 is sufficient unless you’re running an extremely high-performance setup.

Conclusion

In conclusion, I’d love to hear from fellow enthusiasts:

  • What’s your experience with RBF 600 and RBF 660?
  • For those who have tested both, which one would you recommend for track use?
  • Are there specific conditions or car setups where one performs better than the other?
    I appreciate any insights you can provide!

Looking forward to reading your thoughts!

2

I’ve experienced the same! The handling on the 660 is noticeably sharper, especially during tight corners. If you prioritize speed, the 660 is definitely the way to go.

6 Likes
3

I totally get you! The RBF 600 is stable but the 660 delivers power that can be exhilarating. It depends on what kind of rider you are, I suppose!

4

From a performance metrics perspective, the RBF 660 has a higher boiling point, translating to less brake fade during intense track sessions. Definitely something to consider if you’re pushing hard.

5

I personally like the RBF 600 because it feels more controlled during acceleration. It’s easier to handle for longer track days. Has anyone tried both for extended periods?

6

Excellent point! If the brakes are strong under pressure, it really helps with both handling and speed on the track. I’m leaning toward the 660 now.

7

I’ve heard that the RBF 600 can feel a bit sluggish in fast straights compared to the 660. But is that true? I want to make sure my bike suits my fast-paced style.

8

Honestly, I think both have their strengths. It’s about finding what complements your riding style. For me, the 600 feels perfect, but others swear by the 660!

9

Sluggish? More like ‘dependable’! The RBF 600 gives a solid performance but if you’re into raw speed, I’d back the 660.

10

That’s true! It’s all about rider preference. The RBF 600 suits smoother pressure on the brakes, while the 660 might be the choice for aggressive riders. I’m curious though, how do you calculate speed differences?

11

I think it comes down to braking distance and response time. The RBF 660 is quicker, but it also may take time to adjust to its sensitivity for someone used to the 600. A good question, chris37!

12

Great to hear your experience with RBF 600! I’ve heard that RBF 660 offers better heat resistance but at a higher price. Is that worth the investment for regular track usage?

13

I’ve been using RBF 600 for my track days, and I find the pricing is generally lower than RBF 660. However, maintenance costs can vary based on usage. It’s crucial to think about the overall value it offers in performance.

3 Likes
14

RBF 660 is indeed more expensive, but it maintains its performance longer, which could save on maintenance costs. Plus, the resale value typically stays higher for RBF 660, so you might get more back later.

15

Don’t forget about the environmental aspect! RBF 600 is often seen as more eco-friendly. Also, if you’re on a budget, RBF 600 is a solid choice for weekend warriors.

16

That’s a valid point! I guess it depends on how serious you are about your track performance and how often you’re racing.

17

True! But when it comes to performance on the track, can we really compromise? Is RBF 600 enough for serious competitions?

18

Personally, I’d go with RBF 660 if you’re doing serious track days. The grip and fade resistance make a huge difference, and in motorsports, every fraction of a second counts!

19

I think it’s all about balancing your needs. RBF 600 is budget-friendly but could lead to more frequent fluid changes. RBF 660 might save you that hassle down the road.

20

Exactly! But what about long-term costs? Are we sure the performance gain outweighs the jump in price?