R33 V R34 Turbines...

[3intheBack]

So, we have all had a talk about this but here goes again. I have in front of me two turbine housings. As the title says an R33 series 1, and an R34 neo. The R33 has been taken from Qikstagea's (Rob) - a 96' S1. And the R34 is mine - 2000 S2 Neo.

Will post pics later.

Hopefully one day I will CC the pair!

Anyway here are the numbers off them:

2IU is the R33, written in two places. Beside the flange that bolts the turbine to the exhaust manifold (on the inside), and the other is on the outer side facing where the dump pipe bolts on.

O96 is the R34. all stamped in the same place.

They are markedly different to look at! the R34 is about 5mm WIDER across its back and most of the scroll follows this larger profile. THIS MAKES IT SOMEWHAT LARGER THAN THE R33! I have not CC'ed the housings yet, but any backyard rocket scientist could tell you they will perform differently!

The R33 SHOULD encourage boost earlier in the rev range, where the R34 SHOULD build slightly larger power figures...

So, anybody done a back to back test of this?? I have pics on the camera and will post later..

Any thoughts?

[psi]

the stagea is bit of a heavy old girl. Nissan knew this and built the engine slightly different to the skyline. Things like smaller intake plenum runners to enduce torque at lower engine revs & different tuneing and so on.

So with that in mind, the smaller turbine would really be helpful.I would think it should help try and maximise the torque curve. well that is if it is a family taxi!!

If it isn't a baby hauler, the larger turbine would help if you are building a maximium effert engine were every factory component is pushed to its end. like injectors, plenums, turbo and the like. (the dear stuff)

I would like to note that the numbers on the series 1 Skyline turbine arethe same as the stageaseries 1. Go figure! I would like to point out that the Neo engine gained hp over its older brother. Bigger HP was supported by a slightly larger intercooler and the turbine seems to to be the same. I wonder wot other small things they changed?? thats a whole new thread i think..

[wolverine]

the difference in turbines is about 10-15kw

i'm not sure about the smaller runners though. it was something we looked at as a reason for hitting a wall on the dyno but it was more or less rejected by smarter and more knowledgeable folk.

[psi]

Anybody noticed that when nissan changed from series 1 skyline to the series 2, the compressor changed from alloy to plastic compiste. they have the same OD, but the alloy compressor is higher than that of the plastic unit. The Neo also has the plastic compressor. From wot i can see, the compressor housings have not changed from the series 1 skyline to the Neo in the Skyline or stagea.. hmm. Anyone got somethin different?

[psi]

15kw. hmm. did the torque curve move around with the different housing? i'm guessing the smaller turbine run out of puff in the top end.. but if the torque curve was up early, then it would not be a bad thing. after all, how often do you drive your car at peak revs?

[GoldZilla]

I would like to note that the numbers on the series 1 Skyline turbine arethe same as the stageaseries 1. Go figure! I would like to point out that the Neo engine gained hp over its older brother. Bigger HP was supported by a slightly larger intercooler and the turbine seems to to be the same. I wonder wot other small things they changed?? thats a whole new thread i think..

Anybody noticed that when nissan changed from series 1 skyline to the series 2, the compressor changed from alloy to plastic compiste. they have the same OD, but the alloy compressor is higher than that of the plastic unit. The Neo also has the plastic compressor. From wot i can see, the compressor housings have not changed from the series 1 skyline to the Neo in the Skyline or stagea.. hmm. Anyone got somethin different?

According to my experience, the s1 R33 Skyline turbo and s1 Stagea turbos are different, as are the numbers on the compressor housing. Also, in the shots I took, the wastegate looks bigger on the Stagea turbo, but this may not be the case, and I didn't think to measure it at the time either. The s1 R33 turbo was marked with 45V3, but my blown Stagea one was marked 45V4. The numbers on the turbine side were the same as what you mentioned (2IU).

(The s1 R33 turbo is on the left in both shots...)

Going by the information we've all shared here in the forum, the s1 Stagea uses an s2 R33 Skyline engine, which makes sense since the Stagea was released during the time the s2 R33 was being built. It also means it also gets the s2 R33's plastic compressor wheel. I blew a turbo just over a year ago, and replaced it with a second-hand standard s1 R33 turbo with steel compressor wheel. The compressor was in millions of bits, it completely sheared the shaft in two, and the turbine wheel was chipped on three blades. (Budget and time didn't give me much choice back then, unfortunately, so I took what was available and it's been fine so far...)

[Ska]

More pics from Warren:

I have these pics in 2592x1944 if anyone wants the bigger versions

[psi]

in the pics i sent ska via warren, the R34 (neo) stagea turbine is the larger unit. The smaller one is the series 1 stagea(R33), (or series 2 skyline).