JDM Boost Bypass Kit instructions
Senior Member
Joined: Feb 2001
Posts: 630
Likes: 0
From: Mid West
This gets the same thing accomplished
Remove the pink line from the top of the boost control diaphragm valve, (not the solenoid valve) and plug it. I used a 1/4" bolt cut to about 3/4 inch long but that still has about 1/4" of smooth shank so you don't get an air leak. You can use a 1/4" hose mender and a 1/4" cap.
Next, get 3/16" Tee at the auto parts store. Put this Tee into the boost hose that goes into the firewall and up to the boost gauge(there is a white 3/16" hose mender in this location stock). Get 9" of 3/16" rubber fuel line to go from this Tee to the top of the boost control valve.
The result is the computer will no longer have the ability to dump boost at the shift (torque reduction) or as part of the over-rev protection. The computer will never know and will not throw a soft or hard code. The boost bypass will still be active at idle through near zero vacuum, and closed shut in all boost conditions. Just be careful, The computer can't help protect you from over-revving and over-boosting or over-heating and doing
damage to the motor.
see http://www.ncs-stl.com/Images/BoostMod.jpg for photos
Remove the pink line from the top of the boost control diaphragm valve, (not the solenoid valve) and plug it. I used a 1/4" bolt cut to about 3/4 inch long but that still has about 1/4" of smooth shank so you don't get an air leak. You can use a 1/4" hose mender and a 1/4" cap.
Next, get 3/16" Tee at the auto parts store. Put this Tee into the boost hose that goes into the firewall and up to the boost gauge(there is a white 3/16" hose mender in this location stock). Get 9" of 3/16" rubber fuel line to go from this Tee to the top of the boost control valve.
The result is the computer will no longer have the ability to dump boost at the shift (torque reduction) or as part of the over-rev protection. The computer will never know and will not throw a soft or hard code. The boost bypass will still be active at idle through near zero vacuum, and closed shut in all boost conditions. Just be careful, The computer can't help protect you from over-revving and over-boosting or over-heating and doing
damage to the motor.
see http://www.ncs-stl.com/Images/BoostMod.jpg for photos
Registered User
Joined: Apr 2002
Posts: 358
Likes: 0
I hate to say it, but that slightly different from JDM's pics and method. Having just installed my JDM boost bypass yesterday, there is no way I could figure out what to do with that pic... perhaps different parts? I dunno... perhaps I'm not to bright...
again, for those who can wait, the JDM's will be up tomorrow morning...
again, for those who can wait, the JDM's will be up tomorrow morning...
Registered User
Joined: Apr 2002
Posts: 358
Likes: 0
Ok, JDM Boost ByPass instructions are back up where they were post b4:
JDM Boost ByPass
also, JDM has SOME of their mod instructions available at:
Other JDM Install Instructions
happy modding
JDM Boost ByPass
also, JDM has SOME of their mod instructions available at:
Other JDM Install Instructions
happy modding
