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R32 GTST owners - Did you know...

TTT

By TTT,
in Engines & Forced Induction

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  • 8 months later...
R33vit Experienced

R33vit

Posted
Posted
has anyone found out if this is actually possible with the r33 rb25det pfc on the r32 rb20det??? I'd love to know if its true or myth!

Cheers

I have the datalogit software for RB25det which covers the following PFC's

RB20DET

RB25DET

RB251PRO

The interface and software are the same but the maps are not. So if you think you can just plug it in and away you go you would be wrong. You will need the default map to start with in a RB20DET which would be different to the Default map for a RB25DET

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Cubes Grand Master

Cubes

Posted
Posted

I may test this out soon ppls.

The RB30DET won't run on the stock RB20DET maps, I assume this is due to the head being a RB25 (bigger valves/ports etc).

From what I've heard the RB25DET ECU will run the RB30DET with no problems.

All I have to do now is try to find some one with a R33 PowerFC willing to do the test.

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xRHETTx Mentor

xRHETTx

Posted
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Does that mean it would be fine, as long as you tuned it carefully straight away?

If true, this would be great news, as the R32 Gtst PFC is still worth about $2000 new. (compared to R33 at about $1100)

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R33vit Experienced

R33vit

Posted
Posted
Does that mean it would be fine, as long as you tuned it carefully straight away?

If true, this would be great news, as the R32 Gtst PFC is still worth about $2000 new. (compared to R33 at about $1100)

Id say you will need the default's which the RB20DET PFC comes with for it to work. There is more to a PFC than just Ign & Inj map's. If we can get a R32 PFC on a datalogit laptop and then save the default's and use them in a R33 PFC on a R32 in theory this should work. Although if you ever needed to do a PFC reset the maps would default back to R33.

Be interested to see if SK has anything to add to this thread.

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yogi000 Mentor

yogi000

Posted
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I was looking on nengun and greenline they're about 1300-1400approx landed. Thats the AP engineering model (low impedence injectors only), only the ECU, no hand controller.

But if the r33 works, it makes things heaps easier, since theres more floatin around.

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Roy Grand Master

Roy

Posted
Posted
Does that mean it would be fine, as long as you tuned it carefully straight away?

If true, this would be great news, as the R32 Gtst PFC is still worth about $2000 new. (compared to R33 at about $1100)

If you look at the pins on the R33 ECU a few of them dont match the R32 wiring, so there is definitely a need to fiddle with wiring to get it working. If it woks, but i suspect it can be made to work, but not positive

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R33vit Experienced

R33vit

Posted
Posted
Be interested to see if SK has anything to add to this thread.

Or in this case troy

If you look at the pins on the R33 ECU a few of them dont match the R32 wiring, so there is definitely a need to fiddle with wiring to get it working. If it woks, but i suspect it can be made to work, but not positive

I guess that means the ECU's have different looms and I would'nt fark with it.. If you blow a PFC, $2000 for the specific model would of seemed a sweet deal

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Roy Grand Master

Roy

Posted
Posted

I had a hang up that i wanted to use the Pro which isnt available with the R32 so looked into it.

But some things to consider,

For:

- injectors same impedence

- coil packs are interchangeable between engines

- both from the same RB family

However:

- its a big assumption to assume that things like water temp, idle control valves etc are all 0-5V or same resistances and therefore compatible

- some of the injector pins dont match up in the plugs but majority of wires do.

If an R33 owner went RB30 it would be interesting to see them have a play with a re-mappable R32 ECU in their car, if a bit of a play means you can tune the RB20 ecu to run it then i would be more confident in plugging in the $1500 Pfc into an R32 and seeing what works/how it works

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funkymonkey Grand Master

funkymonkey

Posted
Posted

hehe Series 1 R33's used a PTU to control ignition, series 1.5 and Series 2 had the PTU included in the ECU... now... RB20's don't have VVT like later model RB25's... do the maths, its not simple just plugging in a Rb25 Power FC.

However, if one was to trick the power FC into thinkiing it was running a really early model RB25DET then that should work just fine. End result... its a lot easier to find and buy an AP engineering power fc anyways.

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