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Laurel Conversion - Need Help!

decoyslikecurves
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decoyslikecurves Enthusiast

decoyslikecurves

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Hi,

I have a c33 laurel with the rb25de auto in it. I purchased an r32 gts-t manual halfcut to put in it, mainly because I like the revy nature or rb20s and they're cheaper than rb25's. I've so far set up both the cut and the car in the same garage and Im about to perform some engine lifting and swapping.

In this time, I've noticed the following things:

1. The rb20det ecu plugs straight into the rb25de loom

2. The power steering resivoire is Gold and small in the c33 rb25de laurel, and black and tall with a sensor on top on the 32 gtst rb20det halfcut. I suspect the sensor might be for hicas? - which the laurel DOESN"T have...

3. The Brake booster in the laurel is quite small, the one in the r32 gtst cut is a big bigger.

So here are my questions, any help at all would be really ace:

Q1. Will the rb20det ecu + rb20det motor work with the rb25de loom? Or will I need to take the loom out of the r32 halfcut and put it into the laurel.

Q2. What's the deal with these resivoires? I can only assume that the tall black one with the sensor on it is for the HICAS on the r32, so I wont need it for my non hicas Laurel and can use the standard one. Am I correct?

Q3. Looks like I would have to take the brake booster off via the cabin side of the firewall - I don't really want to, so assuming I'm using the standard c33 turbo brakes which it has, can I just leave the standard booster on? Would it be advantageous to put the bigger r32 one on?

And lastly, Q4: As far as I know most people use an sr20det manual gearbox crossmember for the rb20 gearbox in the c33, but seeing how mine is an rb25 model, would this be any different? If so, what should I use?

Anyone that takes the time to answer these - thanks very very much

Gavin

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decoyslikecurves Enthusiast

decoyslikecurves

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Yeah I've gotten that from people actually... So I've decided to use both the standard brake booster and standard pwr steering res/pump but the real question is Am I able to use the rb25de loom with the rb20det motor and ecu?

decoyslikecurves Enthusiast

decoyslikecurves

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if its a non VVT Rb25de then yes you can use the loom on the rb20det.. will be the same, however its it has VVT then you will need the loom to suit an RB20det.

Use a stock RB20 crossmember for the box.. will bolt straight up `

Thanks Simon, this is hugely appreciated... Just to confirm, are you definetly sure that the non vvt rb25de loom will work with the rb20det?

Thanks again

  • 2 weeks later...

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