Accessories

Bell
crank 90 degree – Allows the linkage to change direction. In some
applications this makes a much tidier package.
1.75” arms with ¼”id bearing.
Part
Number 53065-89331 List 115.00+ Racer Decal Discount $ 95.00+
Speed
controller - If you control the speed of the co2 exhaust from the cylinder
as it moves it allows you to slow the opening of the cylinder allowing the
car to launch better on a slick starting line Fully adjustable speed
controller $ 38.00+
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Prices are in AUD (Australian Dollars) + GST
Installation
Notes:
The LOWE SLC
(Start Line Control) can be installed in a push or pull cable application.
In either case you must insure that the throttle pedal has a travel stop as
you do not want the rotation stop on the injector or carburetor being the
travel stop for the system as you will inflict damage to the injector,
carburetor or the linkage if you do not have a pedal travel stop. Since all
small diameter controls have many times the strength if you place them in
tension versus compression it is highly recommended that your throttle
linkage is engineered to put the cable and all the hardware in a tension
environment. This means you should have a pull throttle cable and as noted
above it should have a pedal stop so the only load the cable, levers or
cylinders see are the loads imposed by the throttle return spring.
Not all race
cars have the same amount of cable travel to achieve the transition from
idle to wide open throttle. Since they can all be different the LOWE SLC
launch cylinder has a travel stop provided to assist you in calibrating your
system to suit your application. Set the travel stop to the amount of travel
needed.
The LOWE SLC
launch cylinder has a 10-32 thread provided for those who want to just
thread the throttle cable into the bottom of the cylinder as it works well
in many situations this way. This is pictured in the photo above. Some
clients prefer to put the launch cylinder out by the injector others prefer
to put it down by the throttle pedal. Each situation must be engineered to
suit your application.
Some clients
will make a bracket and run the cable parallel to the cylinder. This will
shorten the overall length and it can create a side load situation on the
cable.
Installation Instructions
for locating the throttle cable mounting bracket and setting the LOWE SLC
cylinder travel stop.
The
location of the throttle cable mounting bracket on the cylinder end will
vary depending upon if you are using this with a delay box or not. See
Method 1 and Method 2 above.
Method 1
(with delay box) keeps the throttle fully closed once the system is
activated. Set this by installing the LOWE SLC launch cylinder in the cable
and connecting to the foot throttle pedal or injector throttle arm. With the
throttle butterflies fully closed and the LOWE SLC launch cylinder fully
extended and the throttle foot pedal against the stop under it now locate
the cable mounting bracket and attach it. Once this is done, when activated
the SLC launch cylinder will extend and push the foot throttle pedal to the
“floor” all the way to the stop while leaving the throttle butterflies fully
closed and the engine will continue to idle. Now you have to set the LOWE
SLC launch cylinder travel stop. Remove the throttle return springs and
while holding the throttle foot pedal against the stop open the throttle
wide open and move the LOWE SLC launch cylinder stop against the end of the
cylinder and lock in place. Test with low pressure shop air before
connecting to the CO2 cylinder regulator preset to 145 psi. Reinstall
throttle return springs.
The stroke
of the launch cylinder has a travel stop to allow you to adjust it to the
range of motion that your throttle cable actually moves.
Method 2
(without delay box) keeps the throttle NEARLY fully closed once the system
is activated. To install Insure the foot throttle pedal stop has several
turns of adjustment available to allow the pedal stop to be adjusted to
allow slightly more opening. Now, after installing the LOWE SLC launch
cylinder in the cable and connecting to the foot throttle pedal or injector
throttle arm. With the throttle butterflies fully closed and the LOWE SLC
launch cylinder fully extended and the throttle foot pedal against the stop
under it now locate the cable mounting bracket and attach it. Once this is
done, when activated the LOWE SLC launch cylinder will extend and push the
foot throttle pedal to the “floor” all the way to the stop while leaving the
throttle butterflies fully closed and the engine will continue to idle (with
the current throttle stop position). Now you have to set the LOWE SLC launch
cylinder travel stop against the end of the cylinder.. Remove the throttle
return springs and while holding the throttle foot pedal against the stop
open the throttle wide open and move the LOWE SLC launch cylinder stop
against the end of the cylinder and lock in place. Test with low pressure
shop air before connecting to the CO2 cylinder regulator preset to 145 psi.
Reinstall throttle return springs.
With the
adjustments as described above this will launch the car at an idle position.
Some racers like to “leave” at “just off idle”, “smooth”, or even more rpm.
The LOWE SLC allows this adjustment. By adjusting the throttle foot pedal
travel stop to slightly open the throttle butterflies at wide open throttle
with the LOWE SLC activated you can preset the launch rpm right in the pits
before you even go to the starting line. Once you do this you must reset the
LOWE SLC launch cylinder travel stop to accommodate this new length.
How the
driver would use this is to stage their car, either first or last it does
not matter, and activate the LOWE SLC. In doing so the throttle pedal goes
to the “floor” but not to the pedal stop and continues to idle. In doing so
it does not build un-necessary heat in the engine or converter. ONLY once
the driver sees that both the stage and prestage bulbs are lit for BOTH
lanes only then does the driver push the pedal all the way to the travel
stop increasing the engine RPM to the preset level. Knowing their spot on
the tree all the driver does is release the transbrake button at the right
time and the car opens the throttle and releases the transbrake insuring the
most accurate and consistent launch program.
To give or
check the final adjustments before connecting to the CO2 bottle and
regulator preset to 145 psi use shop air and a regulator set at only 15-20
psi to cycle the system to insure it operates correctly and all adjustments
are correct. Reinstall throttle return springs.
Step by
step cylinder mounting process
1. Make
sure the race car has an adjustable and robust throttle pedal stop.
2. Set the
throttle pedal stop to a comfortable position for the driver when the pedal
is at wide open throttle.
3. From
this position make sure the throttle pedal stop has adjustment in both
directions.
4. Mount
the SLC cylinder body to the push - pull throttle cable.
5. Make
sure the SLC cylinder shaft stop is installed on the SLC cylinder shaft but
leave the stop loose. Do not connect CO2 hoses yet.
6. Mount
the SLC cylinder shaft ball joint to the throttle shaft arm.
7. Extend
the SLC cylinder to the maximum length and hold the throttle pedal down
against the throttle pedal travel stop.
8. In this
position mark and mount the throttle cable housing quick release bracket to
a secure and robust bracket.
9. Hold the
throttle pedal against the throttle pedal stop and use your hand to open the
throttle butterflies to wide open position – now slide the SLC launch
cylinder travel stop against the top of the launch cylinder and secure in
place with the lock screws.
10. This
sets the launch RPM at idle position. If you want to increase the launch RPM
adjust the throttle pedal travel stop to slightly open the throttle
butterfly plates when the SLC is activated and the throttle pedal is
depressed to the throttle pedal travel stop.
11. After a
few starts and adjustments you will have the start line RPM preset so as a
driver you never have to look away from the tree and get caught out looking
at the tach when the tree goes green.
Wiring
diagram - included with installation instructions
The wiring diagram included is a suggested method of wiring the SLC. This is
not the only method but one that we use on our race cars. We use a heavy
relay to operate the transbrake solenoid as the transbrake solenoid uses
more power than the transbrake control switch can reliably handle. We do use
a relay for the shift solenoid but not the SLC control solenoid as the SLC
solenoid gets its power from the transbrake relay switch and not the
transbrake switch directly. Some racers use fuses in the electrical system
but others don’t as they fear vibration causing a fuse failure and the
subsequent loss of a race because the fuse blew.
If you are
using a delay box the SLC wires directly into the delay box and will
activate with the box controlling it. It is recommended to use a relay in
this situation as the delay box circuit is not robust enough to provide
enough current flow to activate the SLC CO2 solenoid.