R33-r34 Turbo

[Birth]

I don't know my R34's that well. What year did the R34 change over from series 1 to series 2? A series 1 vs. 2 R33 (the whole car - not the turbo) are easy to distinguisg from one another becaise of the face lift - is it the same with R34's?

Alternatively, how do I tell the difference between an S1 and S2 R34 turbo?

Thanks!

[benl1981]

They can all hold about the same boost.

Maybe the R34 series 2 has the Op6 exhaust housing (larger) so will make about 10kw more as stated.

They all spool quick. R33 one with the plastic compressor wheel will be the earliest spooler but all these stock ones are very reponsive. The larger exhaust housing will delay you hitting full boost by about 300rpm.

[Birth]

Thanks benl1981, so you are saying that all the RB25's are better than the VG30, but the R34 is at full boost about 300 rpm later than an R33?

[RBwhatever]

Just on topic..

R33 turbo is laggier and will have less responce than a R34 series one turbo .. R34 series 1 turbo spools much quicker and with the right mods can be full boost a 3g and less.

R34 turbo series 2, is bigger and can run a higher boost level, still spoools quick but not as fast as a series1 .. Ideal for a high flow.

I only know this because ill be doing exactly that for my 34

How is it that the R34 S1 Turbo can spool quicker than a R33 S2 turbo? Maybe on their respective engines.

Is it only the R34 S2 that has the VG30 exhaust housing and the R34 S1 has the same turbo as the R33 S2?

I don't think birth has mentioned it, but he's got an RB20 with a VG30 turbo and is looking for a more responsive turbo than what he's got.

In short I'd say R33 S2 turbo. If the R34 S1 turbo is exactly the same size (exhaust housing) then get that....only because its younger though.

[Birth]

Thanks KeyMaker. Have you seen anything on teh forums about how to tell the difference between the R34 S1 and S2 turbos?

[Birth]

Is the difference between a series 1 and series 2 the same as an RB25DET Neo and RB25DET (not neo)?

[RBwhatever]

Thanks KeyMaker. Have you seen anything on teh forums about how to tell the difference between the R34 S1 and S2 turbos?

No, I wasn't even aware there was a difference. My understanding was that all the R34GTT Turbos had the VG30 exhaust housing.

http://www.skylinesaustralia.com/forums/t1...r34+turbo+S1+S2

Might be an interesting read for ya.

[benl1981]

Main Differences:

R33 Series 1 Turbo: The Baseline (Metal comp wheel)

R33 Series 2 Turbo: Plastic compressor wheel - quicker spool slightly

R34 Turbo: Most have the bigger exhaust housing so will be a little laggier. Rumours that some have the smaller housing. Not sure on comp wheel. 10kw more than R33 turbos if you get the "OP6" housing.

VG30 turbo: Same exhaust housing as R34 (If you get the "OP6"). Compressor wheel is smaller. Exhaust wheel possibly the same as R33/R34. Apparently not as good as an R33 turbo because they are laggy (due to the R34/VG30 housing) and don't make that much power (due to the small comp wheel size - more like R32 turbo size).

Edited November 6, 2007 by benl1981