Using An Rb26dett Power Fc On An Rb20det

[kwazza11]

sounds like you've got it in one. but i've decided on the rb25det PFC, and gtr injectors with the resister pack and run a z32 AFM.

problem solvered.

[grigor]

I'm still not quite there.

I'd forgotten about pin 36 air temp on the Rb26 but OK, it's an empty socket in the Rb20 and 25.

Only concern is my old Rb20 uses the AAC valve for idle speed, air con and power steer RPM control.

But the R33 in the garage has the AAC valve for idle, but has a second valve for air con and power steer.

I don't have any pin outs for this extra valve on my old diagrams.

So the Rb25 PFc is looking good in an Rb20 (with those minor injector mods), but will it also need some wiring mods to control the aircon and power steer RPM?

[qr4pain]

so to run a 25 pfc on a 20, is it cyl 4 and 6 or is it cyl 5 and 6 that need to be swapped?

is it possible to list all the changes required on one post to avois confusion, as i have just added rx7 6 port

n/a 470cc injectors to my 32 and it's running rich to the point of stalling above 3000rpm (doesn't help that my coilpacks are rooted, cmon splitfires)

[SirRacer]

i have the rb26dett pinout here in front of me (managed to get a pdf of the manual for the ca + r32 rb series) and it seems the injector grounds are same for the rb26dett as they are for the rb25det therefore converting a rb25de (r32) or rb20det is going to be harder with this computer than the rb25 computer

ill take the printouts to work tomorrow and compare them then when i have some more spare time

[SirRacer]

Using an rb26dett loom on an rb25de (r33 head) the differences are (will post up later difference between rb20det but rb25 is easier)

Differences

* Wastegate valve control solonoid (dont see why u wont need it anyway)

* AFM Ground (wire afm in parallel and would be fine or dejetro)

* AFM Intake sensor front (depending on what one you use you could run 2 or wire as above, i think the 26 expects a different air temp sensor though)

* Intake air temp sensor

* Throttle valve switch (dont have a clue what this is but affects r32 also)

* Fuel pump terminal control output 1

* Fuel pump terminal control output 2

* Sub electrical fan relay

r32 rb25de(Loom is basically same as rb20det, however rb20 has a fuel control terminal volt control output and FICD solenoid input signal.

rb20/25de (r32) with r33 rb25 computer

Differences

* FICD solenoid input signal (not used by r33 computer or rb20det loom)

* Swapping of injectors to suit loom 112 & 114

* Throttle valve switch (isnt on r33 loom)

r33 rb25de loom is the same as rb25det

some things we may need to clarify( i think they are for the slushbox) so power fc wont support them anyway

* Throttle sensor output signal (Says to A/T C/U)

* Throttle valve switch power supply

* Intake air output signal (Says to A/T C/U)

* Engine A/T control input signal