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Difference Between Rb25de In R32 And R33

dartani0n

By dartani0n,
in Engines & Forced Induction

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dartani0n Newbie

dartani0n

Posted
Posted

What is the difference between an RB25DE engine from an R32 and an R33 ?

I have a 93 R32 GST25 and am looking at replacing the plugs.

I thought all RB25DE engines were identical (hence the model name RB25DE, if the engine is different it should have a different name!) but the NGK website (http://www.ngk.com.au/PartFinder/spark_plug_imports.php) shows 2 completely different spark plug part numbers (for both irridium and platinum) depending on if its a 91-93 RB25DE, or a 93-98 RB25DE version.

Mine is a 93, but because its an R32 Im guessing Im supposed to use the 91-93 part numbers.

Repco and SuperCheap look at their books and tell me I should use part number BKR5EIX-11 but thats the part number from the 93-98 version.

The NKG website indicates I should use BCPR5EIX-11

Anyone know what the K and CP stand for, in the first part of those part numbers?

  • 4 weeks later...
funkymonkey Grand Master

funkymonkey

Posted
Posted

R32 GTS25's came factory with an RB25DE, they were available from late '92 in coupe and sedan form.

The earliest R33's came with the same engine as the R32 GTS25. They both had non VVT RB25DE's, some R33 GTSt's also came with an RB25DET with no VVT either (the cam cover has 1 lump not 2).

The sparks you should be using are the same as a regular R32 RB20DE, and I'd recommed using Coppers instead of Platinums or Iridiums as they serve bugger all use on an N/A. They should be perfectly fine as long as you change em when you service your car regularly.

  • 3 weeks later...
Eug Grand Master

Eug

Posted
Posted
i would go with the iridiums. they will last for about 100,000 kms instead of the coppers 20,000 or so kms. plus you will get increased fuel efficiency and possibly a little more power.

i am not sure about the iridiums, but i am running platinums in mine.

they dont like dyno's and are due for a change after less than 10000km - turning a cold engine over isn't as smooth anymore...

next set will be ngk coppers...

p.s no noticeable power increase - MAYBE a little smoother acceleration...

simply not worth it at $20 per plug.

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