worzel wrote:Interesting comments since I still seem to be having problems with plus 2 fronts on a sprint. thinking about the two systems (std sprint and plus 2) the pedal travel surely must increase since the 0.7 m/cylinder I'm using now has to displace larger pistons. Fitting the smaller (5/8") one must make that "softer" pedal more pronounced.
Pedal travel ceratinly increases in comparison to an
unservoed car with a 0.7" master cylinder, but when you take into account the effect of the servo (which also creates a 'softer' pedal, remember), an unservo'd 5/8" master cylinder doesn't feel all that much different to a servo'd 0.7" one.
I did my conversion in 'stages'; first I changed the hydraulics and bled the system, but left the original (standard) pads in place. esult was very disappointing (similar pedal 'feel' in terms of softness/pedal travel as with the servo, but very high pedal pressures required to stop the car).
I was actually quite despondent at this stage, thinking I'd have to re-fit the servo. Then I changed to the 'Greenstuff' pads, which
transformed the brakes. I can now lock the wheels up with less pedal effort and more predictability than I could with the previous (Lockheed) servo in place, and the pedal travel is approximately the same as with the servo.