CP3581 - 1042 CG8 B1

76
Actuation
GENERAL DESCRIPTION
These valves have been specially designed for use in competition vehicles where it is
desired to reduce the hydraulic line pressure and therefore braking effort of the rear
brakes to compensate for varying road / track conditions or vehicle handling
characteristics.
- CP3550-13 lever type valve provides the driver, or the co-driver with seven
distinct settings from which to select the most suitable braking ratio.
NEW - CP4550-1 twin bore lever type, is a 2 in and 2 out valve. This valve
enables the user to utilise original fl uid pipe runs on Grp ‘N’ or similar applications
where a tandem master cylinder (diagonal split system) is specifi ed.This provides the
driver, with seven distinct settings from which to select the most suitable braking ratio.
- CP3550-14 screw type offers infi nite adjustment within the limits of normal brake
operation. With the cap screwed fully in no reduction in output pressure occurs, with
the cap screwed fully out output pressure is reduced to approximately 1/3 rd of input
pressure.
INSTALLATION
To obtain the best performance using these valves, the brake balance should be
biased towards the rear so that with the valve piped into the rear line and set in position
7 (or the cap screwed right in) where virtually no reduction occurs, the balance is as
much to the rear as will ever be needed. Placing the control lever in positions either 6
to 1 (or screwing the cap outwards) will progressively reduce the rear line pressure
giving more bias to the front.
WARNING
Due to internal adjustments set by AP Racing, do not strip these assemblies.
- DO NOT attempt any modifi cation of these valves.
- Strictly for competition use only.
NOTE:-
These proportioning valves are suitable for use with any brake fl uid that conforms to
DOT 3, DOT 4 or DOT 5.1 standards, but best all round performance will be achieved
with either AP Racing PRF660 or 600 brake fl uids.
69.28
Output Pressure (BAR)
100
90
80
70
60
50
40
30
20
10
0
0
16.00
CP3550-13
Basic installations &
Performance Details.
POS. 6
POS. 7
19.50
10
POS. 5
POS. 4
Ø29.00
40 00
POS. 3
POS. 2
POS. 1
Ø23.15
7.60
32.00
11.50
163.75
20 30 40 50 60 70 80 90 100
Input Pressure (BAR)
22.55
105.00
Position 7/72 Bar
Position 6/65 Bar
Position 5/58 Bar
Position 4/52 Bar
Position 3/46 Bar
Position 2/41 Bar
Position 1/36 Bar
Output Pressure (BAR)
100
90
80
70
60
50
40
30
20
10
0
0
CP4550-1
Basic installations &
Performance Details.
NOTE:
7 POSITIONS ON
CAM/LEVER FOR
ADJUSTMENT.
10.5
30.5
OUTLETS
X 2
10
16.95
2 MOUNTING
HOLES Ø6.5,
CBORE Ø12.0
7
INLETS
X 2
6
49.5
7.0
34.0
MAX
5
20 30 40 50 60 70 80 90 100
Input Pressure (BAR)
4
Proportioning Valves
Position 7/72 Bar
Position 6/65 Bar
Position 5/58 Bar
Position 4/52 Bar
Position 3/46 Bar
Position 2/41 Bar
Position 1/36 Bar
CP3550-13
Lever type.
CP3550-14
Screw type.
CP3550-14
Basic installations &
Performance Details.
www.apracing.com +44 (0)24 7663 9595
3
2
1
OUTLETS
X 2
82.0
5.0
72.0 7.0
20.7 18.0 137.0 MAX
22.5
INLETS
X 2
14.5
43.5
9.5
34.5
18.0
30.00
Output Pressure (BAR)
36.0
2 OFF M6
CLEARANCE HOLES
COUNTERBORED
Ø11.0 TO DEPTH 7.0
100
90
80
70
60
50
40
30
20
10
0
0
10
91.00 SETTING EQUAL
TO POS'N 4 OF CP3550-13
94.80 SETTING EQUAL
TO POS'N 1 OF CP3550-13
20 30 40 50 60 70 80 90 100
Input Pressure (BAR)
New
Product
CP4550-1
Twin bore lever
type.
20.00
KNURL
CONNECTIONS
TAPPED M10 x 1.0
SPOT FACED Ø17.0
1¾ Turns In 95 Bar
1½ Turns In 77 Bar
1¼ Turns In 69 Bar
1 Turns In 60 Bar
¾ Turns In 53 Bar
½ Turns In 53 Bar
¼ Turns In 37 Bar
Fully Out 34 Bar