B&M LAUNCH CONTROL KIT User Manual
Installation Instructions
Launch Control
(see www.bmracing.com for the latest technical product information)
Part Number 46075
© 2007, 2002 by B&M Racing and Performance Products
This Launch Control must be
installed according to these
instructions for safe operation. The
unit can be used in either the front
wheel part of the brake system or the
rear wheel part of the brake system
of a passenger car or light duty truck.
Install the launch control in the rear
brake system only for use as a hill
holder system on the street.
The B&M Launch Control is a
standard design with one connection
from the master cylinder and one
connection to the brakes.
WARNING: The B&M Launch
Control is designed primarily for use
on high performance vehicles used in
drag racing. It is for short term use
(60 seconds maximum) to lock the
wheels while staging the vehicle for
drag racing. It is not intended for use
as a long term brake holding device.
It should only be used on passenger
cars and light trucks (3/4 ton or less)
using a standard hydraulic brake
system that is in good safe operating
condition. If your vehicle is equipped
with a dual diagonal braking system
(the left front is connected to the
right rear and the right front is
connected to the left rear; common
to front drive imports), two launch
controls must be utilized. The B&M
Launch Control should never be used
as a temporary brake holding device
in place of a parking brake or in place
of a driver depressing the brake pedal.
IMPORTANT: Read and fully
understand these instructions before
installing the B&M Launch Control.
Note that these instructions contain
warnings that must be observed in
order to reduce the risk of improper
installation that could make the
vehicle unsafe and result in possible
serious injury. If you are not
experienced or qualified at doing this
type of installation, we strongly
recommend that you have the B&M
Launch Control installed by a qualified
and certified automotive mechanic.
Do not cut or attempt to flare steel
tubing. Do not use copper tubing. Use
a tube bender when bending the
tubing to avoid crushing the tube. Pre
assembled steel braided BRAKE
hoses may be an acceptable
substitute for steel lines in high
performance applications.
INSTALLATION NOTES
On rear wheel drive applications, the
solenoid valve can be installed in the
front wheel brake system as a staging
device for drag racing and in the rear
wheel brake system for short term use
as a hill holder (60 seconds
maximum). On front wheel drive
applications, the solenoid valve(s)
should be mounted in the rear braking
system(s) for use either as a staging
device or hill-holder (60 seconds
maximum), The solenoid valve does
not interfere with normal operation of
the brakes or with safety regulations
when installed according to these
instructions.
The brake light system on the rear
of the vehicle must operate when any
part of the brake system is
pressurized. A hydraulic pressure
brake light switch must be installed in
the system if the launch control valve
defeats the operation of the stock
brake light switch. See the electrical
section for details.
The launch control valve must be
mounted to a rigid surface to prevent
vibrations that could cause failures of
the joints or lines· The firewall is a
good mounting location. Keep the
valve and the brake lines away from
the heat of the exhaust system.
Two basic types of master
cylinders have been used on
production cars, single master
cylinder and dual master cylinder·
Dual master cylinders have been
required on all production cars built
since approximately 1970, earlier cars
have single master cylinders. The dual
master cylinders have the brake fluid
reservoir divided into two separate
sections while single master cylinders
have a single compartment reservoir.
SOME CARS (MOSTLY FRONT
WHEEL DRIVE) HAVE
DIAGONALLY SPLIT SYSTEMS
WHERE THE RIGHT FRONT
Printed in the USA
9500553-05
SYSTEM A
Dual Master Cylinder
SYSTEM B
Dual Master Cylinder
SYSTEM C
Dual Master Cylinder
Master
Cylinder
Pressure differential
switch block
Wire to
warning light
To rear
brakesTo left front brake
To right front brake
Distribution block
TYPICAL STOCK SYSTEMFRONT BRAKE INSTALLATIONS REAR BRAKE INSTALLATIONS
New
line
connector
Cylinder
Male
Master
Connector
To rear
brakes
The size of this
tube nut determines the size
of the new line
To left front brake
To right front brake
Male
Launch
control
solenoid
valve
Pressure
differential
switch block
To left front
brake
The size of this
tube nut determines the size
of the new line
To left front
brake
To right
front brake
New line
To right
front brake
To rear
brakes
Master
Cylinder
To rear
brakes
Master
Cylinder
May require a new
line to reach valve.
Wire to
warning light
Launch control
solenoid valve
Male
connector
Use a union.
Distribution
block
Pressure
differential switch
block
To right
front brake
To left front
The size of this
tube nut determines the size
of the new line
To right
front brake
Launch control
solenoid valve
To left front
brake
brake
New line
Master
Cylinder
warning light
Master
Cylinder
Male
connector
To rear
Wire to
brakes
To rear
brakes
May require a new
line to reach valve.
Use a union.
Master
The size of this
tube nut determines the size
of the new line
Original line
redirected to
solenoid valve
To left front brake
To right front brake
New
line
Cylinder
connector
Male
To rear
brakes
Launch
control
solenoid
valve
BRAKE AND THE LEFT REAR
BRAKE ARE ON ONE CIRCUIT
WITH THE LEFT FRONT BRAKE
AND RIGHT REAR BRAKE ARE ON
THE SECOND CIRCUIT. FOR
THESE SYSTEMS, IT IS
RECOMMENDED THAT TWO
LAUNCH CONTROLS BE UTILIZED
, ONE IN EACH SYSTEM.
Illustrations are given for the hydraulic
portion of six typical single and dual
master cylinder brake systems. These
represent the hydraulic system of
most domestic and import vehicles.
The electrical section of the
To right
front brake
Male
branch
tee fitting
To left front
brake
Male
connector
Launch
control
solenoid
valve
From master
cylinder
New
line
Master
Cylinder
Steel plug
straight
thread
To rear
brakes
brakes
To
The size
of this
tube nut
determines
the size
of the
new line
Left
front
original
line
Union
Male
branch
tee
fitting
To right
front brake
Steel plug
straight
thread
Launch control
solenoid valve
New line
Master
Cylinder
The size of this
tube nut determines the size
of the new line
To rear
Male
connector
Note: Connect left front original line to male
branch tee fitting. If original line doesn’t reach,
connect new line with union as shown,
brakes
instructions is the same for all
systems. Read the instructions
thoroughly and identify the additional
brake line and fittings that you will
require. These lines and fittings are
available for most popular vehicles. In
order to determine the correct fittings
required, a tube nut gauge is included
with this kit. The locations to check
the fittings are shown on the
illustrations for the different types of
brake systems.
INSTALLATION
Step 1. Measure the stock tube nut
at the position indicated on the
2
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