The complete plug-n-play kit.

Special Note!

This lot of JMBCs will be produced with blue Super Silicon hose from HoseTechniques.
This will provide higher quality, appearance, and reliability due to the properties of the hose.
Thanks to Lucky @ HoseTechniques for supporting this SOGI project.

Main Components of Kit:
Entire Kit is Assembled as Shown in Picture, ready for hookup in car!
Kit components may be substituted for equivalant without notice.

• A: 1/2" T fitting with hose clamps.
• B: Needle Valve "bleeder trim"
• C: Brass T fitting with 1/4" hose barbs.
• D: 250max psi Regulator, with Hose Fittings. "Boost Regulator"
• Includes a Regulator Mounting Bracket.
• 5' of 1/4" Silicon Hose
• 9 Screw Type Hose Clamps.

Skills Required:

• Ability to maintain a modded 300HP supra and know when things are running oddly.
• Ability to drive a 300HP supra without killing yourself/others.
• Ability to pull out intake piping, work w/ hoses, and use common tools.
• Common mechanical sense.
• THIS IS NOT A "FIRST MOD" for beginners.
• Strongly recommended: aftermarket boost gauge, esp if boosting over 8psi.

Plug-n-Play Connections:

• Turbo Pressure Outlet
• Actuator Pressure Inlet
• Topmost air intake hose, it's next to the BOV.

 

Mounting:

Remove the intake piping, from the fender to the 3000 pipe. This will allow access to the turbo/actuator.

Remove the piping from the turbo inlet to the air filter, as one piece.

Check clearance to hood, mount bracket E to the car body, near the passenger shock mount.

Mount component D in bracket, tighten snugly.

Remove the hose at the Turbo Compressor Outlet. See Mounting Point #1.

Connect Kit-Point #1 to the Turbo Compressor Outlet Mounting-Point #1.

Lower and tighten the screw-type clamp.

Connect Kit-Point #2 to Mounting Point #2 (The Actuator), use the screw-type clamp.

Using the following picture as a guide, cut the intake hose where the blue arrow indicates.

          Before     After

Insert component A to the intake hose, as in the 'After' picture. Use the the two large clamps.

Make sure all hose clamps are tight.

Keep component B within reach when routing lines.

All hoses must bend smoothly, do not crimp/pinch them!

Reinstall all piping.

Operation settings:

1. Screw component B all the way down, then back up one full turn.
2. Screw component D all the way down.
3. Drive to test peak boost- It should be near stock.
4. Screw D up- Corse tuning: few turns / Fine tuning: 1 inch turns.
5. Drive the car to max boost and monitor reading.
1. If boost did not rise, or is not high enough for your taste:
1. Go to step 4
2. If you hit fuel cut:
1. Screw D down a bit  (to decrease boost setting)
2. Go to step 5
3. If you end up screwing component D all the way up and still do not have increased boost:
1. Turn component B down a bit
2. Turn D down a few turns
3. Go to step 5
4. If you obtained desired peak boost level
1. Go to step 6
6. Drive on highway, cruise at 50mph in 5th gear and floor it, reach peak steady boost and note:
1. If the peak boost osciliates (The aftermarket guage needle bounces) or the boost creeps up slowly:
1. Unscrew component B up a very little.
2. Go to step 6
2. If the boost hits peak for a flash and falls to stock (6-7psi) level:
1. Screw component B down a few turns.
2. Go to step 6
3. If the peak boost level falls slowly at WOT:
1. Screw B down a very little
2. Go to step 6
7. Drive in all gears, observe peak boost behavior, peak boost should not exhibit behaviors 6.1-6.3

Step 6  is sometimes tricky, try different settings of B to learn how the peak boost pressure reacts.

Summary

• Use D to set the peak boost level
• Use B to fine tune the performance quality of the peak boost level

Notes:

Consider painting a stripe on knob/body of D to know if someone has turned it.

If your crafty, paint 3 stripes on it of differenct colors for 8psi, 10psi, Max psi. :-)

Cars without high-flow exhaust and intake systems should set boost at 8 psi max.

Common max settings for carefully maintained and intake/exhaust modded cars may be 11 - 13 psi.

At the higer boost setting, if you hear a flutter sound at throttle release, you need a new BOV too.

A couple MR2 Turbo owners have successfully used this setup.
I have seen a regulator-based setup in a MkIV TT Supra, not sure if the bleeder is needed.

Don't make a mess in your pants the first time you hit fuel cut. :-)