Link G4 R32 GTR SETUP

[TT94]

Hi,

I bought an older version of the LINK G4 Ecus and now im trying to figure out the installation of it to my GTR. I've read the manual, but still wanna clear some things out. 

- MAP SENSOR:The is one Map sensor in the R32 GTR already? I belive mine is connected to the back of the intake manifold and "T" connected with boost gauge. I guess i disc the boost gauge and connect the MAP Sensor vaccuum hose to the fuel pressure reg. as link recommend? And connect the boost gauge somewhere else.

-Boost Solenoid: I have a vaccuum hose from the ECU, this is the one i connect with the aftermarket boost solenoid i install (+ wastegates)?
-O2 sensors: Can i use the OEM/Standard O2 Sensors and ignition coils?

-Injectors: I need to change these for high impedance, right? ( If i dont connect "ballast" to the old ones ) 

-Boost solenoid OEM with the restrictor: Just disconnect the OEM solenoid since i install a new one? 

-MAF sensors: remove/disc? 

 

Thanks.

[Adamw]

First of all please detail exactly what ecu you actually have.  We made about 30 different "Link G4 ECU's" so it is important to know what you have.  

[TT94]

On 1/4/2023 at 11:39 PM, Adamw said:

First of all please detail exactly what ecu you actually have.  We made about 30 different "Link G4 ECU's" so it is important to know what you have.  

It says: LinkECU G4 nissan gts/gtr bb v1.1, link electrosystems 2008.

[Adamw]

The MAP sensor is inside the ecu, you need to run a vacuum hose from this up to one of the vacuum ports on the manifold.  There is a nipple pointing backwards at the back of the engine just above the throttle body on #6 port, this is probably the best source.  Or tee into the FPR hose.  There are another couple of nipples underneath the manifold in the block that the idle valve attaches to that you could use for the boost gauge.  

 

On 1/5/2023 at 12:25 AM, TT94 said:

Boost Solenoid: I have a vaccuum hose from the ECU, this is the one i connect with the aftermarket boost solenoid i install (+ wastegates)?

Boost solenoid is plumbed between the boost source (usually compressor housing) and the wastegate, nothing to do with the ecu.  

 

On 1/5/2023 at 12:25 AM, TT94 said:

O2 sensors: Can i use the OEM/Standard O2 Sensors and ignition coils?

Ignition coils yes, The stock O2 sensors are narrowband so arent any use for tuning, they are typically only used for cycling mixture around stoichiometric to keep catalytic converters working efficiently.  

 

On 1/5/2023 at 12:25 AM, TT94 said:

Injectors: I need to change these for high impedance, right? ( If i dont connect "ballast" to the old ones ) 

No the GTR has a ballast resistor from the factory.  If you upgrade to high impedance injectors then you will need to bypass the ballast but if you are using stock injectors you dont need to do anything. 

 

On 1/5/2023 at 12:25 AM, TT94 said:

Boost solenoid OEM with the restrictor: Just disconnect the OEM solenoid since i install a new one? 

Yes.

 

On 1/5/2023 at 12:25 AM, TT94 said:

MAF sensors: remove/disc? 

Up to you.  The link ecu wont be using them.  

[TT94]

On 1/8/2023 at 10:57 PM, Adamw said:

The MAP sensor is inside the ecu, you need to run a vacuum hose from this up to one of the vacuum ports on the manifold.  There is a nipple pointing backwards at the back of the engine just above the throttle body on #6 port, this is probably the best source.  Or tee into the FPR hose.  There are another couple of nipples underneath the manifold in the block that the idle valve attaches to that you could use for the boost gauge.  

 

Boost solenoid is plumbed between the boost source (usually compressor housing) and the wastegate, nothing to do with the ecu.  

 

Ignition coils yes, The stock O2 sensors are narrowband so arent any use for tuning, they are typically only used for cycling mixture around stoichiometric to keep catalytic converters working efficiently.  

 

No the GTR has a ballast resistor from the factory.  If you upgrade to high impedance injectors then you will need to bypass the ballast but if you are using stock injectors you dont need to do anything. 

 

Yes.

 

Up to you.  The link ecu wont be using them.  

Thank you!! 

Which 02 sensors does the old G4 ecu support? LSU4.0, 4.2, 4.9 etc..? I found out that g4x and storm supports 4.9, but cant cant find anything about my older verision.

[Adamw]

Only the G4X Fury has an onboard Lambda controller, any other ecu will require a external wideband controller.  G4 needs a controller that outputs a 0-5V analog output.  The sensor is irrelevant to the ecu, you need to use the sensor that your controller is designed for.  

[TT94]

On 1/17/2023 at 2:27 AM, Adamw said:

Only the G4X Fury has an onboard Lambda controller, any other ecu will require a external wideband controller.  G4 needs a controller that outputs a 0-5V analog output.  The sensor is irrelevant to the ecu, you need to use the sensor that your controller is designed for.  

Is one lambda sensor enough if i connect it further down on the exhaust where downpipe connects from the turbo? or should i run 2 as factory?

[Adamw]

1 is typically fine for an inline engine.