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Rb25Det R32, Need Some Final Help

Traah221

By Traah221,
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Traah221 Contributor

Traah221

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Hello you beautiful people you, I just would like to know what solutions you previous RB25 swapped R32 GTS-T Gurus had for;

1. The different sized heater hoses

2. The throttle cable mounting bracket

3. If anyone else has had an issue with the aircon belt being horrendously loose?

and 4. I have a series II RB25, can i swap in RB20 coil packs to mesh better with my RB20 Harness, or am I just completely shafted?

A pre-emptive thanks for any and all input.

Also: I'm not spamming separate threads, I apologize, I just honestly don't know where to drop this topic.

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Traah221 Contributor

Traah221

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Alright, final snyopsis on my coil pack situation is this;

Running an RB25 Series 2, with Series 2 ECU and Coil Packs, with RB20 Harness. This won't work, obviously, so my question is can I swap out the Series 2 ECU for a Series 1, and to supplement that, swap out my coil packs with Series 1 Rb25 or RB20 coil packs? Would that be my only way to make this engine run with the given parts installed?

Spurdo Experienced

Spurdo

Posted
Posted

pretty sure most people get all the parts to match the engine i.e have all S2 engine, coils, harness, ecu = no problems.

dont know for sure whether s1 ecu works with s2. why didn't u look into this beforehand and just gone with the tried and true methods?

HR32GTS 4DOOR Community Regular

HR32GTS 4DOOR

Posted
Posted

Use Rb20 harness igniter and coilpacks, then wire up an extra wire for the VCT. series 2 ecu should work, but if it doesn't just grab a series 1

OR The much much better solution. Use Rb20det ecu with nistune and get it tuned.

Traah221 Contributor

Traah221

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Spurdo; I simply trusted the wrong sources, I have an issue with getting parts to where I'm at, so I had the engine and ECU ordered as one through someone off-base to be shipped to their house, and trucked into the auto shop for me, but they didn't think to look for a Series 1, instead choosing the better option engine with less miles and an attached clutch. It just happened to be a Series 2, unfortunately, which puts me in my little predicament now.

4DOOR; Thanks a million, finally the answer I was looking for. Luckily the local junker has an HCR32 with an RB20DET i can snag the coil packs off, as well as a Series 1 ECU in there somewhere. You're a lifesaver mate.

HR32GTS 4DOOR Community Regular

HR32GTS 4DOOR

Posted
Posted

you can also use rb25 s1 coilpacks they are the same. its just easiest to use the rb20 loom cause everything for the body is already done. you also need to get the injector plugs for the 25 and cut the old ones off the 20 loom and solder the 25 ones on cause they are different.

Traah221 Contributor

Traah221

Posted
  • Author
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Yeah, i have the harness in and built, that's exactly what I did, everything is solid save for the injectors, I realized what was wrong almost immediately, but hey, still got the engine to fire and idle on the first try, but any prolonged use with the S2 coil packs hooked to the ignitor would cause some coil pack blowouts. With the RB20 loom and ignitor, I am pretty much forced into using the Rb20 Coil packs, aren't I? If I understand right, the earth ground, 7 prong plug is on opposite sides of the ignitor for RB25 and RB20, correct?

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