2JZGTE ETTC Guide (VVTi included)

[wilbo666]

This is a guide for how to setup a switch that can place the sequential turbo setup on the 2JZGTE (VVTi and non VVTi) into parallel mode as opposed to the factory sequential mode. The reasons for wanting to do so has been discussed many times, in many places so please do a search in that regard

The people on supraforums didn't know how to setup ETTC on VVTi 2jzgte, so I did this up...

Might as well post it here too

I suggest using two (2) 1N4004 or similar diodes close to the ECU as that way you can run a single, individual wire to your switch; which is most likely going to be mounted on the opposite side of the cabin to the ECU. Less wires = less mess

It also means that you only require a SPST (Single Pole, Single Throw) switch.






While slightly different this is also a good guide by Sbyder (No VVTi)
http://www.jzs147.com.au/forum/viewt...ed2877484a51aa

Cheers
Wilbo

[PlacentaJuan]

i still dont get how the e-ttc mod works.

you need pressure to actuate the actuators and unless they are both open allready you are going to get a sequential spool.

can someone pls explain it.

[wilbo666]

i still dont get how the e-ttc mod works.

you need pressure to actuate the actuators and unless they are both open allready you are going to get a sequential spool.

can someone pls explain it.

The first time it will start to spool in sequential...but as soon as any boost gets made that boost is used to open the IACV and EGCV, as well as charging the pressure canister.--> Parallel mode

After that as long as your IACV and EGCV diaphragms, VSV etc don't leak they will stay open --> Parallel mode.

Cheers
Wilbo

[PlacentaJuan]

aah ok i thought so.

there were ppl on supra forums who said you can drive around in one mode - flick the stitch and go to parallel etc...

[wilbo666]

aah ok i thought so.

there were ppl on supra forums who said you can drive around in one mode - flick the stitch and go to parallel etc...

The pressure container is quite good at holding pressure once it has some

I can flick my switch (off boost), while cruising and hear the increase in exhaust noise due to the EGCV opening

And can flick the switch a number of times, on-off-on-off, and there is still enough pressure in the system to actuate the IACV and the EGBV

Cheers
Wilbo