Pezky Posted May 17, 2009 Share Posted May 17, 2009 I am uprating the braking system on my 7. Will be fitting HiSpec Ultralite calipers & M1144 pads at the front & AP uprated Master cylinder. Which fluid should I use? Jonathan Link to comment Share on other sites More sharing options...
taffyracer Posted May 17, 2009 Share Posted May 17, 2009 I only ever use AP PRF660 or Castrol SRF, used most of them and these 2 are the best IMO Link to comment Share on other sites More sharing options...
Area Representative bluenose Posted May 17, 2009 Area Representative Share Posted May 17, 2009 Depends on what you are using the car for and how often you are prepared to change the fluid. The higher performance fluids need replacing fairly regularly but perform much better at higher temperatures. If you do road and occasional trackdays then go for a good quality DOT4 like Castrol Response. Castrol SRF is very expensive but good for racers. Nick Lava Orange Caterham Blackbird Link to comment Share on other sites More sharing options...
Myles Posted May 17, 2009 Share Posted May 17, 2009 Are you fitting the same Hi-spec's I've got here - or a different model? If they are the same, I'd suggest reconsidering your pads while you've still got a chance. My Hi-Spec 4-pots are much lighter than standard brakes - but have the same cylinder-area and so don't actually push any harder. I started off with 1144s (as that was what I used quite happily on the standard clappers) - but they failed to excite. I then switched to Pagid (can't remember whether they are RS15 or 14s at the front - but a quick search will solve that one). The problem is that the Pagids don't like discs that have been used with 1144s (according to John at Performance Braking) - so you can either spend a few hours of manual labour trying to clean them up - or start with the Pagids on your new discs... FWIW, I use bog-standard Halfords Dot 5.1 fluid - and did uprate to the AP 'race' MC. After a lot of hassle, I did (finally) get a nice firm pedal with this set-up and am happy (not deliriously-so though) with them on the road. Couple of other things - if you do go for Pagids, get the thinner of the two available thicknesses (my clappers use the Elise-shape pads) - there wasn't enough clearance to get the thicker Pagids into my hi-specs - and I had to grind them down to fit. Pagids have a good reputation for longevity - so you're not losing anything to speak of my getting the thinner ones. Also - be careful with the hose fitting - if your banjo-bolt is too-long, it will be blocked by the back of the piston - and you'll not get any flow when you try to bleed the brakes for the first time! 🙆🏻 🙆🏻 🙆🏻 🙆🏻 🙆🏻 Alcester Racing 7s Ecosse™ 🙆🏻 🙆🏻 🙆🏻 🙆🏻 🙆🏻 Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Pezky Posted May 17, 2009 Author Share Posted May 17, 2009 Myles Thanks for the word of warning about pads. I have got the HiSpec 260/10 "economy" kit - solid discs not vented. Calipers I have got have same brake hose connection as caterham big-brake kit so should not have the same problem. Jonathan Link to comment Share on other sites More sharing options...
akakubi Posted May 18, 2009 Share Posted May 18, 2009 Hey Jonathan! I found that CC fluid works fine for road and occasional track duty - never had any fade. In my previous saloons I used Ate Super Blue/Gold or Motul 600 - both fairly cheap and worked ok for light track duty and road use. Link to comment Share on other sites More sharing options...
Pezky Posted May 18, 2009 Author Share Posted May 18, 2009 Val YHM Jonathan Link to comment Share on other sites More sharing options...
captain chaos Posted May 18, 2009 Share Posted May 18, 2009 Castrol (Super) Response Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now