Best Brake Fluid for Track Use

[Rocketreid]

What’s the thoughts on using Castrol React SRF for an Exige used regularly on track

Pricey but seems very good ?

[deggles]

It's probably the best out there technically, but it's ludicrously expensive. The main difference seems to be the 'wet' boiling point, I've switched to using cheaper but still decent fluid like Motul RBF 660 and just changing it more often (dry boiling point is similar).

[Munter]

I tried the really expensive stuff, then switched to using ATE superblue, (which is now Super200 because blue colour fluid is not allowed) https://www.motamec.com/ate-super-blue-type-200-do...

I'd say it's almost as good. Slightly spongier feel at all temperatures I suspect...but I'm not a racing god so..it'll do.

Edit: not sure how I ended up in the lotus area...it's not one of my favourites...assumed this was a general track thread.

[Paul_M3]

I’ve used Gulf RF1000 in the past, which seemed good value considering the high spec.

But I have decided to use SRF in my Exige. Yes it’s more expensive than others, but compared to the costs of trackdays overall, £55 a year to have the best brake fluid available seems pretty insignificant.

[Rocketreid]

I tend to agree that £55 seems a small price to pay in order to get the best brake experience.

Will get a litre !

[Paul_M3]

Especially as other fluid would still be £15 - £20, so it’s only an extra £35-£40 a year.

Or in trackday terms, two lunches at an MSV canteen.

[ecain63]

Never found a need to update the brake fluid in my 410. Is this like this like a recommendation for better brake pads?

38 track days and my oem fluid has never let me down. It's pretty decent stuff as standard if I remember correctly ...... like the oem pads are.

[Rocketreid]

ecain63 said:

Never found a need to update the brake fluid in my 410. Is this like this like a recommendation for better brake pads?

38 track days and my oem fluid has never let me down. It's pretty decent stuff as standard if I remember correctly ...... like the oem pads are.

TBH, I tend to agree particularly in relation to pads and have just gone back to the OEM Ferodo DS 2500 as I much prefer their on road performance.

However as mentioned above Castrol React SRF is really only £25-£30 more than OEM so probably worth it

[ecain63]

Rocketreid said:

TBH, I tend to agree particularly in relation to pads and have just gone back to the OEM Ferodo DS 2500 as I much prefer their on road performance.

However as mentioned above Castrol React SRF is really only £25-£30 more than OEM so probably worth it

The DS2500 don't eat your £3500 discs in a half dozen trackdays either.

[Paul_M3]

ecain63 said:

Never found a need to update the brake fluid in my 410. Is this like this like a recommendation for better brake pads?

38 track days and my oem fluid has never let me down. It's pretty decent stuff as standard if I remember correctly ...... like the oem pads are.

I understand what you’re saying, but equally you won’t necessarily know that the standard fluid isn’t good enough until it’s too late. Nothing ruins a track day for me like boiling fluid and/or losing confidence in your brakes. Even if it’s fine on one track, it may not be fine on all tracks. You could be fine on quite fast flowing tracks without lots of hard braking zones and little cooling time between them. Goodwood and Silverstone for example could be very different to say Snetterton in terms of brake temperatures. Every driver is different too.

If I’d spent money on a track day, fuel getting there, hotel the night before, using a days holiday from work etc, I’d be pretty annoyed to have the shine taken off the day by the fluid boiling.

For the sake of £55 a year, I’d rather just use the best available and know I’m not going to have any issues in that respect. Unnecessarily spending £600 on a set of updated pads without first seeing how the standard ones performed would be a different story!