JC
|
| posted on 23/5/08 at 08:59 AM |
|
|
Brake pressure reducers
Hi all, as you can tell from my recent posts, I am at the pedals stage! I only have the fuel tank and battery at the front of the car and am using
Cortina callipers (54mm bore). At the rear I have Fiesta discs/rover callipers (30mm bore). Will a pressure reducer be needed to stop the back
locking first? My instinct says 'No' -what have you all found?
Cheers
JC
|
|
|
|
|
JAG
|
| posted on 23/5/08 at 10:14 AM |
|
|
No reducer will be needed with such small bore calipers on the rear.
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
|
|
|
JC
|
| posted on 23/5/08 at 10:45 AM |
|
|
Thanks! I've just discovered a brake math(s) excel spreadsheet that seems to indicate this! It has certainly given me lots of numbers to think
about!!!!!!
|
|
|
britishtrident
|
| posted on 23/5/08 at 10:46 AM |
|
|
Ideal brake effort split front rear for a midi is about 55 to 60% on the front hence by implication 45% to 40% on the rear.
You have exactly 75% of the effort on the front 25% on the rear. The fronts will lock prematurely.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
JC
|
| posted on 23/5/08 at 11:32 AM |
|
|
Thanks - some meaning to the numbers and some targets! A switch to Sierra rear calipers (42.8mm) or Golf would appear to correct the balance - should
still be no need for compensators/reducers. That just leaves the master cylinders to sort.........
|
|
|
donut
|
| posted on 23/5/08 at 11:55 AM |
|
|
If you use a Sierra master cylinder then you will not need to worry as it produces less pressure at the back than the front.
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
|
|
|
JC
|
| posted on 23/5/08 at 12:24 PM |
|
|
That is a solution - at the moment it would now appear that I actually have the opposite problem to what I originally thought i.e. not enough braking
at the rear!!!!!!! Any idea of the respective diameters of the Sierra cylinders? Could I plumb it in reverse ie back to the front?
Thanks again!
JC
|
|
|
