Huge thanks for explaining that, and yes you’re absolutely right about the bmw fluid being dot 4 not dot 5.1 as I thought!bentaylor wrote: ↑Sat Apr 21, 2018 2:58 pmJust on the brake fluid point.
Just because a brake fluid is rated as DOT 5.1 does NOT make it a good fluid, and especially does not make it a god fluid for on track. FWIW most race fluids with high boiling points are DOT 4....
which fluid did you use as I am struggling to find a BMW fluid that is DOT 5.1 rated?
The OE BMW fluid is DOT 4 and has a dry boiling point (no water contamination) of 230degc and a wet boiling point (water contamination) of 155degc.
I use ATE type200 (used to be called super blue or super gold) as its £15 a litre from Euro car parts, DOT 4 with boiling points of 280degc(dry) and 198degc(wet).
Just as an FYI there are better fluids out there, but they cost significantly more (also these are all competition fluids and all DOT4)
Endless RF650 323 C 218 C (£40 per 0.5l bottle)
Motul RBF600 312 C 216 C (£15 per 0.5l bottle)
Motul RBF660 325 C 204 C (£20 per 0.5l bottle)
AP Super 600 310 C 210 C (£20 per 0.5l bottle)
Castrol SRF 310 C 270 C (£50 a litre bottle)
Whilst searching these prices I did just find some VERY well priced Gulf competition fluid. dry boiling point of 325degc and only £11 a bottle!
https://www.opieoils.co.uk/p-69356-gulf ... fluid.aspx
edit: just to add I've not tracked my BMW yet but on my clio 172 and my 350Z I was at the limits of the ATE TYP200 and starting to lose the brakes towards the end of long sessions (10 laps+), the 350Z even ended up with TYP200 in the clutch as the OE fluid boiled on track
The BMW being heavier and significantly more powerful will be even harder on the brakes so I would recommend TYP200 minimum tbh
Also worth looking into high temp pads if you haven't already? I swear by Carbon Lorraine. Literally don't fade ever but increase disc wear rates a lot
I’ve heard lots of good things about carbon lorraine pads and am definitely considering changing pads for a more track focussed set.
Good to knownyor experience running your Clio and 350.
Lots to think about, thanks again mate