Discussion
jesfirth said:
depends what you want to do with the car. dot 4 is fine for normal day to day driving. if you are going to hammer the bo****ks off it put in castrol SRF600 - it is stupidly expensive but it never boils
Personally I wouldn't put anything less than DOT5.1 (any make will do) in for general hooligan'ing about. but if you're a track day wanna be, then I totally agree Castrol SRF is the dogs 
Edited by Bluebottle on Tuesday 23 February 19:17
Bluebottle said:
BliarOut said:
I use ATE super blue (then gold) DOT4.
This is where the specification system falls down, cos DOt5.1 is supposed to be the best, yet most race brakes fluids a classed as DOT4 and they are far superior...go figure?
Just dont use the silicone stuff. Its not good for the rubber seals. I had it in my Cobra Kit car when I got it and within a year I had to renew the master cylinder seals (just got a new one) and rear brake drum seals. The brakes on the Cobra were Sierra as well. I would have had to do the same with the fronts as well, but uprated the calipers when I got rid of the silicone fluid.
Bloody stuff floats on top of normal brake fluid as well, so its a b
h to pump out of an existing brake system. I ended up pressure bleeding it as quick as I could to stop it floating back up the piping.
I would use normal Dot 4. The car shouldnt need any more than that unless it gets track day action. I would be temped to bleed the brakes through after a good session on the track in any case.
Hope this helps
Cheers
Marty
Bloody stuff floats on top of normal brake fluid as well, so its a b
h to pump out of an existing brake system. I ended up pressure bleeding it as quick as I could to stop it floating back up the piping.I would use normal Dot 4. The car shouldnt need any more than that unless it gets track day action. I would be temped to bleed the brakes through after a good session on the track in any case.
Hope this helps
Cheers
Marty
Marty V8 said:
Just dont use the silicone stuff. Its not good for the rubber seals. I had it in my Cobra Kit car when I got it and within a year I had to renew the master cylinder seals (just got a new one) and rear brake drum seals. The brakes on the Cobra were Sierra as well. I would have had to do the same with the fronts as well, but uprated the calipers when I got rid of the silicone fluid.
Bloody stuff floats on top of normal brake fluid as well, so its a bh to pump out of an existing brake system. I ended up pressure bleeding it as quick as I could to stop it floating back up the piping.
I would use normal Dot 4. The car shouldnt need any more than that unless it gets track day action. I would be temped to bleed the brakes through after a good session on the track in any case.
Hope this helps
Cheers
Marty
Yep Bloody stuff floats on top of normal brake fluid as well, so its a b
h to pump out of an existing brake system. I ended up pressure bleeding it as quick as I could to stop it floating back up the piping.I would use normal Dot 4. The car shouldnt need any more than that unless it gets track day action. I would be temped to bleed the brakes through after a good session on the track in any case.
Hope this helps
Cheers
Marty
had trouble with the silicone stuff years ago fked up my Master cylinder seals & my remote Servo seals too on another car,on the Chim i just use Dot 4 fine for the road(changed every 2 years)but if you track then Dot 5.1 here http://www.opieoils.co.uk/p-893-motul-dot-51-brake...
synthetic 
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