Clay Head Posted June 25, 2003 Share Posted June 25, 2003 Unfortunately the search function is offline and I know there is a thread somewhere on this. Anyway, what is the best brake fluid for me to use with my big brakes / uprated master cylinder. On a warm track day I noticed that the brakes were a little spongier than I would like and I have dot 5.1 in at the minute (not sure what make). I want to try to retain the ultra firm pedal feel that I have on the road if possible. Link to comment Share on other sites More sharing options...
Paul McKenzie Posted June 25, 2003 Share Posted June 25, 2003 Clayhead, Go a little easier on the booze if you want to maintain your 'ultra-firm feel' Paul Link to comment Share on other sites More sharing options...
EFA Posted June 25, 2003 Share Posted June 25, 2003 AP600 but be sure to change it every season..... (AP only say every 3 months as a safety disclaimer for the Max Power brigade) Fat Arn Visit the K2 RUM website See the Lotus Seven Club 4 Counties Area Website here Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted June 25, 2003 Share Posted June 25, 2003 Castrol SRF works very well. A bit pricey though. Alex Wong www.alexwong.net _________ / __ __ / ___ _//__T/__/_ ___ / (_) (_)/ /`-'/o/ _______ /o/`-'/ / /// ( VDU7X ) // / /___/--_________/--/___/ Edited by - Alex Wong on 25 Jun 2003 21:46:55 Link to comment Share on other sites More sharing options...
Peter Carmichael Posted June 25, 2003 Share Posted June 25, 2003 Never had anything other than success with AP600 and I leave in most of the year. FWIW, sponginess is probably related to the rears and the handbrake mechanism if you are still using the sierra calipers. Link to comment Share on other sites More sharing options...
Clay Head Posted June 25, 2003 Author Share Posted June 25, 2003 Paul - good point, made only last week by the wife... Peter, I can't not ask you to explain a little further about the rears and handbrake mech. How does this affect things and what is the solution? Link to comment Share on other sites More sharing options...
Peter Carmichael Posted June 25, 2003 Share Posted June 25, 2003 The handbrake mech is a mechanical actuation of the same piston and pads. The mechanical mechanism has to back off to allow the pads to release. The mechanism is self-adjusting (ahem), which means to say that it requires sensitive adjustment. IME, pedal feel is significantly affected by the various methods applied to winding back the handbrake mechanism. It seems that the mechanical mech interferes with the straightforward hydraulic mech, possibly backing the pads off suvch that the hydraulics have to move the pads back in contact with the disk resulting in a spongey pedal. The race master cylinder just tends to mask this. Link to comment Share on other sites More sharing options...
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