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GrimmSpeed 3 Port Boost Control Solenoid

Installation Instructions

MazdaSpeed3/MazdaSpeed6

***Picture above is MS6 BCS***

All GrimmSpeed products are intended for Off-Road use only.

Park your vehicle on a level surface. Fully engage the parking brake and put wheel stops on

the front and rear wheels to keep the vehicle from rolling.

Warning (read before installing):

Before moving forward with the setups outlined below, insure that you have the experience

and confidence to properly tune your car. If not, please consult a tuning professional.

Without a proper tune you can overboost and damage your engine.

Under no circumstances is the GrimmSpeed Solenoid to be used in any applications where

failure of the valve to operate as intended could jeopardize the safety of the operator or any

other person or property.

Note! You must tune for this hardware in 3 port mode! Using stock or off-the-shelf EM with a

3-port solenoid installed in interrupt mode will result in overboosting!

Items Included:

MS6 MS3

(1) GrimmSpeed BCS (1) GrimmSpeed BCS

(1) Rubber Grommet (2) M6 Bolts

(1) Rubber Washer (2) M6 Lock Nuts

(2) M6 Lock Nuts (1) Hose Connector

(1) Hose Connector (1) Rubber Cap

(1) Rubber Cap

Summary of content (11 pages)

PAGE 1
GrimmSpeed 3 Port Boost Control Solenoid Installation Instructions MazdaSpeed3/MazdaSpeed6 ***Picture above is MS6 BCS*** All GrimmSpeed products are intended for Off-Road use only. Park your vehicle on a level surface. Fully engage the parking brake and put wheel stops on the front and rear wheels to keep the vehicle from rolling. Warning (read before installing): Before moving forward with the setups outlined below, insure that you have the experience and confidence to properly tune your car.
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A. Purpose The benefits of this upgrade are faster spool, ability to hold higher boost, and better control over boost. A side benefit of the improved boost control is the ability to reach higher target boost levels in the low (1st and 2nd) gears. B. Technical Background A BCS is a binary device – i.e. it is either on (energized), or off. In the context of the MazdaSpeed device, when the BCS is energized, air is allowed to pass through the device, while it is off, the air flow is cut.
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D. 2-Port Installation Installation for MazdaSpeed3: 1. Remove air box top. 2. Remove top battery cover. 3. Remove front battery cover.
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. Line up the left grommet hole with the existing front battery cover hole near the top of the cover. The bracket grommets should be parallel with the top of the front battery cover. 5. Drill the left side mounting hole using a 1/4" drill bit. 6. Using provided Grimmspeed bolts and nuts, mount the solenoid on the battery cover. Reinstall battery front cover and top cover.
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7. Disconnect brake booster vacuum line for easy access to solenoid. 8. Locate the factory boost control solenoid that is bolted to the turbo. Disconnect wiring that goes to it. You may choose to remove the factory solenoid or leave it installed. Unplug the vacuum lines that go to it. 9. Plug in GrimmSpeed boost control solenoid wiring connector into factory wiring harness. Prevent wiring from contacting anything sharp and do not allow wiring to be pinched.
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10. Hook up vacuum lines. Port 1 on the GrimmSpeed BCS will connect to a high pressure boost source. Connect the 4mm (smaller) vacuum line from the wastegate to Port 1 of the BCS. 11. Port 2 on the BCS connects to the turbo inlet. If you prefer, use the included vacuum line to run a new 4mm line from the inlet to Port 2 on the BCS. It is recommended that a plastic zip tie is used to secure vacuum lines.
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Figure: Installation diagram for 2-port bleed mode setup. 12. In bleed mode, you will only be utilizing two of the three ports on the BCS. Port 3 should be capped to prevent un-filtered, un-metered air from entering your inlet when you’re not in boost. To do this, use the included fitting, cap and a small piece of vacuum hose. Alternatively, you may source a smaller cap for the fitting. Installation for MazdaSpeed6: 1. You will be installing the GrimmSpeed solenoid on the firewall above the turbo.
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A 3-port solenoid does away with the bleed-based system, explicitly shunting air from the compressor to the wastegate, or compressor to vent (or back into the intake, OEM-style). Drawbacks of the bleed-based system are thus eliminated, with the wastegate seeing literally no pressure when the solenoid is energized, to seeing all of the compressor pressure when the solenoid is de-energized.
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11. Port 2 connects to the internal wastegate actuator vacuum nipple. Remove oem hose on top of actuator and replace with 4mm hose and bring 4mm hose to Port 2 on the BCS. 12. Port 1 should be routed back to the intake or left to vent to atmosphere. It is recommended that a plastic zip tie is used to secure vacuum lines. 13. Tuning: WGDC controls the actuator / turbo. Tuning to the WGDC is required. Start at a WGDC value of 15 and go up from there.
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1. You will be installing the GrimmSpeed solenoid on the firewall above the turbo. You will be using the existing two factory studs. Place the provided rubber washer on the left stud and the rubber grommet on the right. Install solenoid on studs. Using the provided nylon locking nuts, tighten bracket. 2. Follow MazdaSpeed 3 instructions starting at Step 8. F. External Wastegate(EWG) Installation Hook up vacuum lines. See Figure 3.
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Please contact us if you have any questions during installation. 612.379.0000 or sales@grimmspeed.com.