Jump to content
SAU Community

Is it NECCESSARY to run RB25 Harness in R32 Rb25 swap??

604cefiro
 Share

Recommended Posts

604cefiro Contributor

604cefiro

Posted
Posted

Hey guys,

My swap is 95% finished. It is a RB25DET swapped into an R32 GTS-T. Right now it is using the stock RB20 harness.

The main thing is finding a suitable computer.

For now, I am just running a Z32 QU ECU (94+ NA). I am only driving it to get around and obviously driving very carefully and NOT boosting at all.

Right now I am considering these options.

1.) Reprogramming a Z32 ecu to the specs of my motor. And wire up VVT to work.

2.) Running a stock Rb25det ecu (and ppl recommend the rb25 engine harness).

In both these options, is it required for me to run an rb25 engine harness?

What is the reason behind running the rb25 harness anyways? Can't I just wire everythign up manually?

Can anyone shed some light here :confused:

Sydneykid Grand Master

Sydneykid

Posted
Posted

The R32 harness plug won't fit the R33 ECU. So at the very least you will have to buy an R33 harmess plug. From experience the only way I could buy one was with the harness attached. No import dissmantler would sell me the plug on its own, well they would, but they charged me the same as if I had bought the whole harness. So I figured I might as well use what I paid for.

You won't be able to get the VVT working without using an ECU that has the map/logic/program for it. There is no map and no output pin on the R32 ECU for VVT. Hence the need for a VVT capable ECU (eg; R33GTST). Tip, don't get an auto ecu.

The alternative is to forget the VVT, remove it, stick a pair of adj camshaft pulleys on. You will need to replace the inlet camshaft with a non VVT one. RB25DE or RB20DET inlet cams work fine, or there is aftermarket non VVT of course. Then rechip an R32GTST ECU, that's what I did (RB30/25DE) and it worked fine.

Hope that helps:cheers:

Sydneykid Grand Master

Sydneykid

Posted
Posted
How about reprogramming a Z32 (300zx ecu) ?

Im running a 300zx AFM etc.

Will the z32 ecu be able to be programmed with VVT??

As far as I know Z32's never had VVT, so the circuitry won't even be there in the ECU, neither will the logic/map/program. From memory (it's been a few years since I saw one) the Z32 ECU is basically the same as the R32 ECU.:P

BH_SLO32 Proficient

BH_SLO32

Posted
Posted

604cefiro,

Last weekend I installed an RB25DET in my R32 and wired up the RB25 loom and it runs with the factory computer. This option enables factory control of the VVT and boost solenoid etc. You can then run the RB25 power FC if you desire or a plug in Haltech (I'm told it should be available in the coming weeks), wolf etc.

Don't know what it costs to burn a new chip for the R32 RB20's down south but Chiptorque at the Gold Coast charge $600 + tuning (about $700 in total). This is about half the cost of a Power FC. All depends on your budget.

Hope this helps,

Ben

  • 3 years later...
BigC1988 Enthusiast

BigC1988

Posted
Posted

I just got my RB25DET (series 2) and I was hoping you could help me with some questions.

My Skyline is non turbo so it will be a big step with the RB25.

Now then, my first question is about the gearbox mounts, I hear they aren't the same and I will also have problems with the speedo meter. What do you know about this? Can I use the Xmember of the R33 ??

The second is about the harness, everyone that has ever swapped an engine told me that the harness is the most difficult part of the swap. Do you have the diagram of the R32 and the R33 (still can't find it for the R32) and some pointers on how this is done??

Hope to get a reply from you soon

Carlos Rudolph

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Shoota's R33 GT-R RB30/26

      By MBS206 · Posted

      ADHD in all form isn't about "can focus, or can't focus" or is hyper active or isn't etc.   It's all a dysregulation. Either time feels to be stationary, or time just vanishes in a split second. We are either under focussed on the task at hand (as we're over focussed on our surroundings) or we have no idea an atomic bomb went off beside us as we're so hyper focussed and locked in on things.   Not to mention the rapid fire thought process. What it takes a "normal" process to think up a solution to a problem, ADHD will be able to give you 5 different ways to solve the problem, and the pros and cons of each. While we can be highly impulsive and lack the ability to "control ourselves" we can also become paralysed with the inability to make a decision for ourselves. While most of us have an OCD like requirement for perfection, we lack the ability often to remain focussed to get things to a perfect state. Those with undiagnosed ADHD as adults, can often find the last part actually stops them ever attempting to do things that they have the ability to do, as the reasoning is often "if I can't do it perfectly, it's not worth doing"   As for projects... Ha ha ha, I still need to take the other half of my wall trim down in the Fiance's office so I can paint it. Need to finish digging and running the back yard drains, my R33, getting the Ninja bike registered (now being sold), the moped project, fixing either of the lawn mowers so they're reliable, along with a myriad of other things.   It's why I've been going through lately and just being brutal and clearing projects off that I won't actually ever complete. IE, moped will go to the tip, or be given away, bike is being sold, Subaru project being sold, some parts for other projects given away. Or I've been making myself focus on one thing at a time, by ticking off the smallest quickest ones first.   There's also a reason by our mid twenties we seem to be "know it alls", as we've all been down some of the weirdest and oddest rabbit holes when you follow the dopamine trail. It's often also why we're more a jack of all trades, but not a master of one.   However, pretty much all of my hobby projects, in one way or another, all come back around to automotive. That's my zen area.
    • UWISSH!
      One of these is not like the others 😂

      By UWISSH! · Posted

      Remember reading about this not too long ago. been for sale for a long time  this is like when the wife says you need to sell the car so you put it up for a ridiculous price no one will pay
    • GTSBoy
      One of these is not like the others 😂

      By GTSBoy · Posted

      You are perhaps suggesting that it is not a super car? Well....it's not an AU.
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Dropped the MX5 of this morning to get the hardtop colour matched and some PDR done, they are also going to give it a buff to remove some "stubborn" swirl marks and light scratches in the clear coat Over the last few months the poor little thing has copped some shopping centre car park abuse, I try to not park in them, but hitting Westfield's a few times over the last few months has taken its toll, nothing really bad, but enough of a trigger for a "while we're in there" thingie  Once it's back and all the one colour, with a few dents and mark's removed I'll give some of these products a go and see what they're like  
    • PranK
      One of these is not like the others 😂

      By PranK · Posted

×
×
  • Create New...