hi temp brake fluid

[kenny]

Kenny, if you've got the rest of the brake system to warrant the AP fluid, I'd go for it...

Stu Pollocks ali belled discs and a set of Carbotech XP10 pads ready to go on in the spring. Going by some chat I having with BigD in the pitlane at KH he reckoned the fluid goes off before the pad does so thinking that AP fluid could be needed.

[mac]

Big D's trying to retard a damn sight more than you are - Have a look at the wet/dry boiling points of the fluid - and then pick the one with the least drop off. There's no point spending a fortune on fluid with a brilliant dry boiling point on a road car - it won't be dry for long.


If you are boiling the fluid then I would think that your at risk of exceeding the optimum temps for the components and should look at ways of aiding cooling rather than just masking the issue.



2p



Mac

[kenny]

Willing to listen to brake cooling suggestions.

[steve_weegie]

Willing to listen to brake cooling suggestions.

Calling Uldis....

http://bookatrack.co.uk/-pg?1960&15833

Watch you dont overcool them though... FWIW, 95% of the time i was trying to get heat into, not out of my rs-14 pads, and even at that i only managed to melt the discs once.... on a hot day... after 20 laps of lunatic braking at knockhill.

[Mike Scib]

Interesting thread, i always thought Motul RBF600/660 was the budget choice, £10 for 500ml and Castrol SRF was the ££ choice, £40 for 1 litre. I run RBF 600 and never had any problems....

Fluid ............................DRY....... WET
Castrol LMA DOT 3/4......446 .......311
Ford Heavy Duty DOT 3..550....... 290
ATE Super Blue Racing...536........392
ATE TYP 200 .................536........392
Motul Racing 600 ...........585........421
Castrol SRF ...................590........518
Performance Friction .......550...... 284

Ps, BigD runs RBF600

Edit;

Think i will be sticking to my RBF. The wet boiling point lets the AP PRF down

http://s2.pegasusautoracing.com/2008/140.pdf

[Mike Scib]

and a set of Carbotech XP10 pads ready to go on in the spring.

Extreme i would say for a light weight you going racing!! , been running XP8's in my heavy weight S in the heat of France with some big straights along with 3 tracks plus the Ring.....never had any problems

[meatball]

and a set of Carbotech XP10 pads ready to go on in the spring.

Extreme i would say for a light weight you going racing!! , been running XP8's in my heavy weight S in the heat of France with some big straights along with 3 tracks plus the Ring.....never had any problems

I'd been advised to go for the XP8's too!
We'll see how it works out......"he who dares Rodders!"

[Mike Scib]

Carbotech™ XP10™ (1110™): When Carbotech unleashed the XP10™ to the general public, and it was an instant success, gathering multiple regional, divisional, and national championships. The XP10™ is a very high initial bite friction material, with a coefficient of friction and rotor friendliness unmatched in the industry. Fade resistance is in excess of 1650°F. Due to the high level of friction and bite, this material is recommended for cars weighing around 2,000lbs or more, not including formula cars and cars with brake bias bars weighing less than 2,000lbs. This is the preferred compound for the front of Spec Miata racers, SSC,SSB, T3, SRF, ITS, ITE, H1,H2, H3, H4, 944 Cup, ST, GS, Factory Five Cobra’s and many more Grand-Am/ALMS/SCCA/NASA classes. XP10™ is also ideal for advanced/instructor level HPDE drivers. XP10™ still maintains the highly praised release and excellent modulation, rotor friendliness, and 100% non-corrosive dust that have made all Carbotech compounds so successful. XP10™ is not recommended as a daily-driven street pad due to possible elevated levels of dust and noise.

[kenny]

Wow, large bold text and everything.

I have had a fairly long discussion with Ian about the pads, past experiences and future plans. The XP10's are an experiment, if it's overkill I'll swap back to 8's.

Looking at the boiling point info above I'll probably go with the Motul 600.

[philthy]

Wow, large bold text and everything.

I have had a fairly long discussion with Ian about the pads, past experiences and future plans. The XP10's are an experiment, if it's overkill I'll swap back to 8's.

Looking at the boiling point info above I'll probably go with the Motul 600.

Dont think there can be a disadvantage in having the better pads, being able to stay out for longer will be good for the all day events next year. The rotors will def be able to cope with it.

[Mike Scib]

Genuine questions

Will you not end up having the opposite problem being unable to get sufficient heat into them?

Phil if that is the case why not go for the Xp16's ?

[kenny]

Do they do 16's? I must have them

I have had the pedal go to the floor a couple of times last year with the 42's afer not particularly long sessions, never had trouble geting heat into them. Not been happy recently with the 42's, lack of feel, lack of any bite apart from when they were brand new. I had thought about changing to Pagid RS14 but from reading other peoples comments, mainly eating discs and noisy on the road I decided against it.
If the blurb on the XP10's is correct then they shouldn't be quite as hard on the discs, be better on the road and better from cold than the 14's. I felt I was reaching the limits on the 42's and it was time to upgrade.

From speaking to Donald about his thoughts, one of the main things he noted was their consistency. He felt the braking and bite was effective and confidence inspiring every time, that's a big part of what I am looking for, there has been a few "oh crap, am I going to stop" moments with the 42's. Also the car hasn't done as many road miles this year, now that I have the Pug as the daily driver I am happier to sacrifice a bit of optimum road set up for some more hardcore track orientated setup.

[meatball]

Beyond 50% wear the pagids aren't using friction material instead you are using material that is there for bonding....or so I got told recently.
Hence reduced performance?

[Shug]

Wow, large bold text and everything.

I have had a fairly long discussion with Ian about the pads, past experiences and future plans. The XP10's are an experiment, if it's overkill I'll swap back to 8's.

Looking at the boiling point info above I'll probably go with the Motul 600.

Dont think there can be a disadvantage in having the better pads, being able to stay out for longer will be good for the all day events next year. The rotors will def be able to cope with it.

Not true at all - bigger spec doesn't equal better. You have to be able to get the heat in them and keep it there - there will be some options that just won't work on a light car no matter how hard you brake. That said, if Kenny's had the conversation with Carbotech and come to this decision, then it must be feasable. I guess they'll make worse road pads than the XP8 though.

[philthy]

You have to be able to get the heat in them and keep it there .

I dont think that will be a problem at knockhill somehow.

Scib- they arent designed for a road cars, the difference from 8-10 isnt much.