R
Removing the
TRAC
Butterfly
Stock Throttle Body With Trac
Butterfly
Modified Throttle Body with No Trac
Butterfly
HKS makes a kit to Remove
the Trac Butterfly (1312-RT001 / MSRP $95)
Here are the parts that need to
be removed while using the HKS kit.
Here is a cheaper way to block
the holes after you remove the trac plate, abortion use heavy duty epoxy to fill the
holes.
This is Inside the Trac system (trac motor
side),
All removed and filled with heavy Duty Epoxy
This is another way to remove the
traction butterfly, cut it off and weld it!
Clean looking huh?
Egr mod’s
How to Defeat
the Engine Check Light after Performing ANY EGR ModWe apologize for the missing images, this article was missing for some time and brought back thanks to Archive.Org, unfortunately, some images could not be recovered
- Purpose: To
prevent check engine light from turning on after performing any egr mod.- Parts Required:
10K Ohm 1/2 watt resistor, Available
at Radio Shack (Part #271-1126), Electrical tape.- Time Required:
3 minutes.
Steps
::
Unplug the EGR gas temperature probe electrical
connector pictured below. Insert a 10K ohm 1/2 watt resistor into the connector (fig. 3).
This prevents a CPU trouble code from being tripped. Tape the connector with electrical
tape to prevent the resistor from falling out.Note:
it is hard to see the electrical connector on 97-98 models because it’s located
in the opposite position of 93-96, its between the manifold and engine valve cover towards the back
(firewall) – look for it using a flashlight. A screwdriver will help you unplug the
harness.
trd twin clutch install translated
31000-JA800
Supra (JZA80)
Twin Plate Clutch
Model number
Product number |
Car type |
Year |
Note |
31000-JA800 |
Supra (JZA80) |
After May 1993 |
For 6M/T vehicles |
Required parts for
installation (separate purchase)
q Fly wheel set bolts: 90910-02103 – 8
pieces
Enclosed parts
|
Parts name |
Parts number |
Quantity |
Notes |
1 |
Clutch cover |
31210-JA820 |
1 |
|
2 |
Clutch disk A |
31250-JA820 |
2
|
Clutch disk A and B are the |
3 |
Clutch disk B |
|||
4 |
Center Plate |
31292-GA800 |
1 |
With 3 return springs |
5 |
Fly wheel |
13451-JA800 |
1 |
|
6 |
Bolt A |
90110-A0071 |
3 |
M6 cap bolt |
7 |
Bolt B |
90101-A0104 |
9 |
M8 bolt |
Warning on instillation
q Disassemble the clutch at an authorized
factory
q Use this product only on the designated
models
q As soon as receiving this product confirm
that all the parts are included in good condition
q Before starting installing this product,
make sure that the car is parked in a flat place with side break.
q Follow the repair instruction of your
model provided by Toyota dealer.
q Before installing, make sure that the
parts are cold to avoid burns.
q If you re-use the bolts already used in
the car, make sure they are not rusty
q Make sure the bolts are securely fastened.
q Use the designated torque to securely
fasten the bolts
q Because the bolts tend to get loose
immediately after the installment, make sure to securely fasten them before
driving
q After the installment make sure this
product does not interfere with other parts. If so consult the sales agent
q If oil or water did not leak during the
installment.
Warning on using this product
q Use this product only on the designated
models
q This product may be damaged or broken
depending upon storage and driving conditions.
q Sudden acceleration or sudden turns impose
excessive burden on the product and may damage the product.
q Strong collision or shock to the vehicle
may deform or break the clutch.
Immediately inspect the product.
q If you feel abnormal vibration or noise
while driving, park immediately and inspect the product to avoid serious
accident.
q Drive at a normal speed for about 500km
immediately after installing this product.
q The position of clutch pad may move and
half-clutch operation may feel different, but it is normal. We recommend to adjust <stroke?> after
test drive.
q Depending on the usage and conditions,
friction pad significantly wears out.
Especially driving that requires frequent zero start such as drag race
wears out the friction pad significantly.
Inspect the clutch frequently.
q Frequent use of half clutch increases the
temperature of inside of the clutch and inflates or deforms the parts. If the clutch does not move smoothly, stop
the car and wait until the clutch cools down.
q You may hear wheel spinning noise, but it
is normal.
Installment instruction
- Disassemble twin plate clutch
Loosen
bolt A and B to disassemble twin plate clutch assay
- Install release bearing
Attach
release bearing to the clutch cover.
Inspect the release bearing and replace if it is a defect.
- Install fly wheel
1) Attach fly wheel to the crank shaft. Screw 8 new set bolts in the order as
indicated in the box. Further tighten
them using the following torque
Torque:
49.0Nm (500kg – cm)
2) Mark top of the set bolts (see the box)
3) Tighten the set bolts 90 degrees to the
right
4) Make sure all bolts have the painted marks
on the right.
Warning: fly wheel set bolts cannot be re-used.
- Install the clutch
1) Attach clutch cover, clutch disk A, B, and
center plate to fly wheel, and loosely screw bolt A and B. Make sure to match the triangular locks on
the clutch cover, center plate, and fly wheels.
Warning:
If the triangular locks are not properly secured, the turning balance may be
lost, causing abnormal noise and vibration.
2) Insert the ??? bar* in the hole of fly
wheel pilot and determine the position for clutch disk A and B. Dovetail clutch disk A and B.
* An improved SST (number 09301-JA000) will be
released soon.
3) Securely fasten bolt A
4) Securely fasten bolt B
Warning:
If the teeth and center of clutch disks A and B are not securely
attached/aligned, installing T/M will be difficult and may break the disks.
Warning:
Screw in each bolt half way then screw in all way. Then securely tighten them using the
specified torque.
Torque:
Bolt A- 11.8-13.7Nm (120-140kg-cm)
Bolt
B – 27.4-29.5Nm (280-300kg-cm)
Warning:
If each bolt is screwed in all way in one time, the cover may be damaged.
5) Pull out the bar.
- Confirm
After
fastening the bolts, confirm that the height of diaphragm springs are
even. If not, re-do the process 4.
- Install
T/M
Apply
designated pure grease on each moving part.
Follow Toyota repair instruction for details.
- Adjust stroke
Because
the position of clutch pad may move after installing this product, adjust the
pad cloth to the original position.
racelogic traction control installation
Racelogic Traction
Control Installation
By
Derek Wang
This article explains in detail the installation
of the Racelogic Traction Control System on the US Spec MKIV Supra. This
installation article was based on a US Spec ’94 Turbo Supra with TRAC. Other
years, models, and country models may differ. Please consult your factory
service manual whenever possible
To get your own Racelogic Traction
Control in the US, contact Matrix Engineering as they’re the exclusive distributor for the
RLTCS in the US.
Tools Needed:
10mm socket wrench
Wire
cutters
Razor blade
Phillips screwdriver – Various sizes
Flathead
screwdriver
Soldering iron
Overview:
The Racelogic System monitors wheel
speed independently and looks for a difference in wheel speeds larger than a
predetermined (but tunable) threshold. Once the threshold is met, engine power
is reduced by cutting each of the six injectors independently in a rapid cycle.
They system can be adjusted to give a desired level of slip (5%, 10%, 15%, 20%,
etc). Optional features include launch control, full throttle shift, and
adjustable rev limiter.
The wires we will need to tap into are the six
injector wires, the four wheel speed sensor wires, RPM wire, ignition power, and
ground. The adjuster controller will also need to be connected via three wires,
and a serial cable can also be used to interface with a laptop computer for
data logging and additional tuning.
Installation:
Disconnect the negative battery
terminal before working on any electronics on the car
Expose the ECU in
the passenger footwall by removing the plastic carpet trim which runs along the
rocker panel under the door. This will allow for the carpet to be pulled back
after the removal of a few plastic buttons, exposing the ECU cover. Remove the 2
10mm nuts securing the cover then remove the cover. You should now be able to
see the ECU and the factory TRAC computer.
Unplug and remove the TRAC
computer. You will no longer need this with the Racelogic Traction
Control
Loosen the 10mm bolt holding the twin harness plugs onto the ECU
and remove the plugs for easier access to the six injector wires. Find the
injector trigger wires E9-15 to E9-20:
These wires will
need to be cut, one side going into the Racelogic, the other side connected to
the output of the Racelogic:
From ECU side, connect to: Red, Orange,
Grey, Green, Yellow, and Pink wires of the RL.
From firewall side, connect
to: Red/Black, Orange/Black, Grey/Black, Yellow/Black, Pink/Black.
Make
sure each injector wire has the same solid color on the ECU side as the color
striped wire to the firewall side. It is not important which color RL wire
connects to which injector
Shown below is the wiring via a Fields ECU
harness. I recommend soldering these wires and using shrink tube to protect them
from exposure:
Find the RPM
signal wire, E9-58 (Igniter), and tap the Racelogic’s black/white wire into this
signal. You do not need to cut this wire. You can use a razor blade to strip the
sleeve off a small section of the wire, then solder the RL wire and carefully
tape this up with electrician tape.
*Alternate RPM wiring –
If your car has additional
devices like the HKS VPC, Apex’I S-AFC, or any other piece that is already
attached to the E9-58 igniter RPM wire, you may experience an RPM signal drop
which will cause the Racelogic to malfunction. A good alternative is to use the
E10-16 (TACHO) wire on the ECU harness for the RLTC RPM wire:
Connect the RL’s
power wire to an ignition switched power supply. This can be found on terminal
E10-1.
Ground the RL to a good chassis ground. I used one of the ECU
mounting posts by sandwiching the RL’s ring connector on the ground wires
between the chassis, and the 10mm ECU mounting nut. Make sure you get a good
ground connection here by removing any paint that may interfere with the ground
point.
Now we’re ready to wire up the remaining four wheel speed sensor
wires. Expose the ABS/TRAC computer by removing the center dash trim pieces.
First, remove the trim piece around the shift lever by firmly pulling up on the
panel:
Next, remove the
odometer cluster by removing the small screws holding the cluster onto the top
of the dash:
Remove the main
trim piece which holds the clock, and the HVAC controls. Remember to unplug the
clock, the HVAC plugs, the cigarette lighter, and the traction control
button:
With the trim
panel removed, remove the radio and the ABS circuit box and antenna relay:
This exposes the
ABS/TRAC computer which looks like this:
Unplug the left
and the center connectors, then route them out of the dash on the driver’s side.
This will allow for more room to do the wire taps. Also, route the RL’s wheel
speed sensor loom from the ECU area to the driver side footwall by going through
the center dash:
Find the wheel
speed sensor wires on the plugs which are now in the driver side footwall. We’re
looking for the (+) wheel speed sensor wires (A20-5, A20-17, A21-2, and
A21-9):
Click here for diagram of cars without TRAC
Splice
into these wires with the four RL wheel speed sensor wires similar to how you
spliced in the RPM signal wire. The order is not important:
Reconnect the
plugs back into the ABS/TRAC computer:
Find an
appropriate place to install the selector knob/launch control button. Reinstall
all panels, covers, carpet, and trim in reverse order of removal. Then you’re
done!
Testing/Troubleshoot:
Ensure
all wheel speed sensor and RPM wires are connected correctly by monitoring the
green LED on different slip positions on the selector knob. Starting from “WET”,
the first 4 settings on the knob indicate wheel speed sensor input. When each
wheel is spinning, the LED will flash according to wheel speed. The faster the
wheel spins, the faster the LED blinks. Select between all four of the settings
to monitor each wheel individually. If one setting does not show a flashing LED
while the car is moving. Check your wheel speed sensor wiring.
Test the
RPM signal in a similar fashion by turning the selector to “OFF” or 20% slip.
The higher the RPM, the more rapidly the LED will flash.
Once the wiring
is confirmed, follow RL’s instructions for
calibration.
Fmic / radiator panel pics & install
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trd twin clutch install translated
31000-JA800
Supra (JZA80)
Twin Plate Clutch
Model number
Product number |
Car type |
Year |
Note |
31000-JA800 |
Supra (JZA80) |
After May 1993 |
For 6M/T vehicles |
Required parts for
installation (separate purchase)
q Fly wheel set bolts: 90910-02103 – 8
pieces
Enclosed parts
|
Parts name |
Parts number |
Quantity |
Notes |
1 |
Clutch cover |
31210-JA820 |
1 |
|
2 |
Clutch disk A |
31250-JA820 |
2
|
Clutch disk A and B are the |
3 |
Clutch disk B |
|||
4 |
Center Plate |
31292-GA800 |
1 |
With 3 return springs |
5 |
Fly wheel |
13451-JA800 |
1 |
|
6 |
Bolt A |
90110-A0071 |
3 |
M6 cap bolt |
7 |
Bolt B |
90101-A0104 |
9 |
M8 bolt |
Warning on instillation
q Disassemble the clutch at an authorized
factory
q Use this product only on the designated
models
q As soon as receiving this product confirm
that all the parts are included in good condition
q Before starting installing this product,
make sure that the car is parked in a flat place with side break.
q Follow the repair instruction of your
model provided by Toyota dealer.
q Before installing, make sure that the
parts are cold to avoid burns.
q If you re-use the bolts already used in
the car, make sure they are not rusty
q Make sure the bolts are securely fastened.
q Use the designated torque to securely
fasten the bolts
q Because the bolts tend to get loose
immediately after the installment, make sure to securely fasten them before
driving
q After the installment make sure this
product does not interfere with other parts. If so consult the sales agent
q If oil or water did not leak during the
installment.
Warning on using this product
q Use this product only on the designated
models
q This product may be damaged or broken
depending upon storage and driving conditions.
q Sudden acceleration or sudden turns impose
excessive burden on the product and may damage the product.
q Strong collision or shock to the vehicle
may deform or break the clutch.
Immediately inspect the product.
q If you feel abnormal vibration or noise
while driving, park immediately and inspect the product to avoid serious
accident.
q Drive at a normal speed for about 500km
immediately after installing this product.
q The position of clutch pad may move and
half-clutch operation may feel different, but it is normal. We recommend to adjust <stroke?> after
test drive.
q Depending on the usage and conditions,
friction pad significantly wears out.
Especially driving that requires frequent zero start such as drag race
wears out the friction pad significantly.
Inspect the clutch frequently.
q Frequent use of half clutch increases the
temperature of inside of the clutch and inflates or deforms the parts. If the clutch does not move smoothly, stop
the car and wait until the clutch cools down.
q You may hear wheel spinning noise, but it
is normal.
Installment instruction
- Disassemble twin plate clutch
Loosen
bolt A and B to disassemble twin plate clutch assay
- Install release bearing
Attach
release bearing to the clutch cover.
Inspect the release bearing and replace if it is a defect.
- Install fly wheel
1) Attach fly wheel to the crank shaft. Screw 8 new set bolts in the order as
indicated in the box. Further tighten
them using the following torque
Torque:
49.0Nm (500kg – cm)
2) Mark top of the set bolts (see the box)
3) Tighten the set bolts 90 degrees to the
right
4) Make sure all bolts have the painted marks
on the right.
Warning: fly wheel set bolts cannot be re-used.
- Install the clutch
1) Attach clutch cover, clutch disk A, B, and
center plate to fly wheel, and loosely screw bolt A and B. Make sure to match the triangular locks on
the clutch cover, center plate, and fly wheels.
Warning:
If the triangular locks are not properly secured, the turning balance may be
lost, causing abnormal noise and vibration.
2) Insert the ??? bar* in the hole of fly
wheel pilot and determine the position for clutch disk A and B. Dovetail clutch disk A and B.
* An improved SST (number 09301-JA000) will be
released soon.
3) Securely fasten bolt A
4) Securely fasten bolt B
Warning:
If the teeth and center of clutch disks A and B are not securely
attached/aligned, installing T/M will be difficult and may break the disks.
Warning:
Screw in each bolt half way then screw in all way. Then securely tighten them using the
specified torque.
Torque:
Bolt A- 11.8-13.7Nm (120-140kg-cm)
Bolt
B – 27.4-29.5Nm (280-300kg-cm)
Warning:
If each bolt is screwed in all way in one time, the cover may be damaged.
5) Pull out the bar.
- Confirm
After
fastening the bolts, confirm that the height of diaphragm springs are
even. If not, re-do the process 4.
- Install
T/M
Apply
designated pure grease on each moving part.
Follow Toyota repair instruction for details.
- Adjust stroke
Because
the position of clutch pad may move after installing this product, adjust the
pad cloth to the original position.
Auto to 6spd transmission conversion
Auto to 6spd
Transmission Conversion
By
Mohd A.
Last updated
2/7/2003
   This is a guide for
Automatic to 6-speed transmission conversion for the 93-98 Supra Twin Turbo,
with many installation photos. I’m assuming you already have the basic skills to
remove and install transmissions, if not then get someone to help you. Most of
the tools you will need are the basic transmission tools commonly used. Also
each section will list all the parts needed to finish job. You may or may not
have all the parts needed, check your parts before starting. I highly recommend
the Toyota repair manuals for this job, Here are the steps according to the
order I used,
-
In Cabin Modification,
Click Here. -
Raise & Secure the Supra car,
Click Here. -
Removal of the Auto Transmission,
Click Here. -
Modifying the Sub-Tunnel,
Click Here. -
Installing the 6spd Transmission,
Click Here. -
Removing & Installing Differential &
its related parts, Click Here. -
Engine Optional Part, Drive Belt Tension
Damper, Click Here.
FAQ:
1) How much will
this swap cost me?
   it can cost you from few hundred to few
thousands dollars, it all depend if you get your parts new or used,
The major cost is in the 6spd transmission, clutch system components &
differential parts. Also depends if you hire someone to do the work or save the
money and do it yourself, that’s if you are up to the task.2) How long will it take?
   it can be done in
two days, a week or a month, all depend on your skills, tools, availability of all needed parts,
and how much help you get to move on faster, I recommend to think it through and
give yourself lots of time to get the project right, the extra time you give
yourself will let you reflect on your work.3) Can I use the auto
differential?
Yes, but :-), the Auto differential ratio is 3.769, the
6spd differential ratio is 3.133, you will also need to use the auto drive shaft,
and need to extend it, gets
extended almost to the edge which gives it about an inch to hold on to the
shaft, this is how it
would look if its in a normal setup
(not extended), as you can see, its up to you to decide if its safe or not.if your planning on
permanently using the
Auto differential then find a used 6spd front dive shaft.
it will be safer in the long run and will fit like stock.
I did drive my 6spd supra for few weeks on the auto
differential, the gears felt very short, the Speedo was about 15-10 miles off,
the Engine temperature was a littlie above normal, 1st gear was useless, 6spd
gear on the highway could not give me a good speed without pushing the rpm
higher, in return poor gas mileage, in general I hated how it felt, I
recommend strongly the 6spd differential, Also if you do get a Japanese spec
6spd differential it will be about 3.26.
racelogic traction control installation
Racelogic Traction
Control Installation
By
Derek Wang
This article explains in detail the installation
of the Racelogic Traction Control System on the US Spec MKIV Supra. This
installation article was based on a US Spec ’94 Turbo Supra with TRAC. Other
years, models, and country models may differ. Please consult your factory
service manual whenever possible
To get your own Racelogic Traction
Control in the US, contact Matrix Engineering as they’re the exclusive distributor for the
RLTCS in the US.
Tools Needed:
10mm socket wrench
Wire
cutters
Razor blade
Phillips screwdriver – Various sizes
Flathead
screwdriver
Soldering iron
Overview:
The Racelogic System monitors wheel
speed independently and looks for a difference in wheel speeds larger than a
predetermined (but tunable) threshold. Once the threshold is met, engine power
is reduced by cutting each of the six injectors independently in a rapid cycle.
They system can be adjusted to give a desired level of slip (5%, 10%, 15%, 20%,
etc). Optional features include launch control, full throttle shift, and
adjustable rev limiter.
The wires we will need to tap into are the six
injector wires, the four wheel speed sensor wires, RPM wire, ignition power, and
ground. The adjuster controller will also need to be connected via three wires,
and a serial cable can also be used to interface with a laptop computer for
data logging and additional tuning.
Installation:
Disconnect the negative battery
terminal before working on any electronics on the car
Expose the ECU in
the passenger footwall by removing the plastic carpet trim which runs along the
rocker panel under the door. This will allow for the carpet to be pulled back
after the removal of a few plastic buttons, exposing the ECU cover. Remove the 2
10mm nuts securing the cover then remove the cover. You should now be able to
see the ECU and the factory TRAC computer.
Unplug and remove the TRAC
computer. You will no longer need this with the Racelogic Traction
Control
Loosen the 10mm bolt holding the twin harness plugs onto the ECU
and remove the plugs for easier access to the six injector wires. Find the
injector trigger wires E9-15 to E9-20:
These wires will
need to be cut, one side going into the Racelogic, the other side connected to
the output of the Racelogic:
From ECU side, connect to: Red, Orange,
Grey, Green, Yellow, and Pink wires of the RL.
From firewall side, connect
to: Red/Black, Orange/Black, Grey/Black, Yellow/Black, Pink/Black.
Make
sure each injector wire has the same solid color on the ECU side as the color
striped wire to the firewall side. It is not important which color RL wire
connects to which injector
Shown below is the wiring via a Fields ECU
harness. I recommend soldering these wires and using shrink tube to protect them
from exposure:
Find the RPM
signal wire, E9-58 (Igniter), and tap the Racelogic’s black/white wire into this
signal. You do not need to cut this wire. You can use a razor blade to strip the
sleeve off a small section of the wire, then solder the RL wire and carefully
tape this up with electrician tape.
*Alternate RPM wiring –
If your car has additional
devices like the HKS VPC, Apex’I S-AFC, or any other piece that is already
attached to the E9-58 igniter RPM wire, you may experience an RPM signal drop
which will cause the Racelogic to malfunction. A good alternative is to use the
E10-16 (TACHO) wire on the ECU harness for the RLTC RPM wire:
Connect the RL’s
power wire to an ignition switched power supply. This can be found on terminal
E10-1.
Ground the RL to a good chassis ground. I used one of the ECU
mounting posts by sandwiching the RL’s ring connector on the ground wires
between the chassis, and the 10mm ECU mounting nut. Make sure you get a good
ground connection here by removing any paint that may interfere with the ground
point.
Now we’re ready to wire up the remaining four wheel speed sensor
wires. Expose the ABS/TRAC computer by removing the center dash trim pieces.
First, remove the trim piece around the shift lever by firmly pulling up on the
panel:
Next, remove the
odometer cluster by removing the small screws holding the cluster onto the top
of the dash:
Remove the main
trim piece which holds the clock, and the HVAC controls. Remember to unplug the
clock, the HVAC plugs, the cigarette lighter, and the traction control
button:
With the trim
panel removed, remove the radio and the ABS circuit box and antenna relay:
This exposes the
ABS/TRAC computer which looks like this:
Unplug the left
and the center connectors, then route them out of the dash on the driver’s side.
This will allow for more room to do the wire taps. Also, route the RL’s wheel
speed sensor loom from the ECU area to the driver side footwall by going through
the center dash:
Find the wheel
speed sensor wires on the plugs which are now in the driver side footwall. We’re
looking for the (+) wheel speed sensor wires (A20-5, A20-17, A21-2, and
A21-9):
Click here for diagram of cars without TRAC
Splice
into these wires with the four RL wheel speed sensor wires similar to how you
spliced in the RPM signal wire. The order is not important:
Reconnect the
plugs back into the ABS/TRAC computer:
Find an
appropriate place to install the selector knob/launch control button. Reinstall
all panels, covers, carpet, and trim in reverse order of removal. Then you’re
done!
Testing/Troubleshoot:
Ensure
all wheel speed sensor and RPM wires are connected correctly by monitoring the
green LED on different slip positions on the selector knob. Starting from “WET”,
the first 4 settings on the knob indicate wheel speed sensor input. When each
wheel is spinning, the LED will flash according to wheel speed. The faster the
wheel spins, the faster the LED blinks. Select between all four of the settings
to monitor each wheel individually. If one setting does not show a flashing LED
while the car is moving. Check your wheel speed sensor wiring.
Test the
RPM signal in a similar fashion by turning the selector to “OFF” or 20% slip.
The higher the RPM, the more rapidly the LED will flash.
Once the wiring
is confirmed, follow RL’s instructions for
calibration.
Other mods
new readers rides system!! click here to put in your entry. |