Rb25 Turbo Differences Between Models?

[eXc]

Hey Guys,

I've spent the last 2 hours searching and can't find it.

Can anyone link me or;

1) tell me the differences between the R33 turbos.

2) Which one is best suited to the RB20.

3) I know you need to make sure you get "the elbow" for the conversion...but what is it? What does it look like?

4) Any other things I should do first? Fuel pump perhaps? Will I need a SAFC or similar aswell?

Cheers

Chris

Edited October 31, 2006 by eXc

[r32matt]

Hey,

Get the R34 Turbo!

I have a R34 Turbo on my RB20 and it runs really well! Bolted straight on and used the RB20 Actuator to get the stock 10psi. Boost starts just before 3000revs and Full boost comes on just before 4000revs.

Edited October 31, 2006 by r32matt

[salad]

1. i dunno but i would like to find out. i recently just too my S1 turbo off and replaced it with an S2 (because the S1 was rooted) and noticed that the design of the compressor wheel was a little different. the smaller blades did not protrude past the tip of the bigger blades.

and the S1 has a steel compressor where as the S2 has a nylon compressor

2. the S2 is supposed to spool faster due to the lower rotational mass, and seeing as rb20s cant spool turbos well, this would be better.

3. the elbow is the compressor outlet. go have a look at your turbo, it is the first pipe that comes off of your turbo, and goes into your intercooler piping

4. fuel pump is definitely a good idea, and you really should do it, just in case. another good bang for buck mod is to get your ECU remapped. cheap and just as effective as stand alone ECUs. and come with all the stock knock sensors, cold start crap etc

[andylaurel]

and the S1 has a steel compressor where as the S2 has a nylon compressor

alloy compressor... not steel

[salad]

ah, my bad, well some sort of metal that is heavier than nylon

i was just going off what i had read on these forums

[WazR32GTSt]

the newer the better...

[oops]

anyone done/seen a highflowed r33 turbo on a rb20? would this be much laggier? would the highflow be different if it was a series 1 or series2 33?

[eXc]

i have seen some people (including SydneyKid??) say there was a ball bearing R33 turbo? Is that correct? Which series is it?

[mid life crisis]

i have seen some people (including SydneyKid??) say there was a ball bearing R33 turbo? Is that correct? Which series is it?

they all are ball bearing

[salad]

all rb turbos except hr31 were ball bearing, and possibly cefiros werent aswell.

but r32, r33 and r34 (not gtrs) were all ball bearing

Edited November 1, 2006 by salad

[R32Abuser]

i thought 32's were journal bearings??? anyone care to clear this up?

[123456]

The r34 turbo, is pretty laggy i think (has the same sized exhaust wheel as the vg30). In first it doesnt start spooling to about 3-3.5k so it makes taking off sort of hard, it does kick in hard at about 4.5k though. The performance increase wasn't all that great for me, i got a remap at the same time and achieved only 164 rwkw (on the same dyno, that i had had it measured, close to stock, at 133rwkw)

i will upgrade to cgc hi flowed series 2 r33 turbo soonish

Unless i get off my P's before then, and can get a GTR

[fr0st]

Does the R34 turbo have the same size rear housing as the VG30DET?

I've got a series 1 R33 turbo to go on in the next few weeks, can't wait

[salad]

R34 and VG30 have same size rear housings

most people would say its too big for rb20s

[Cubes]

S2 R33 Turbo is the best bet for spool & power on the rb20.

[Col-GTSX]

S2 R33 Turbo is the best bet for spool & power on the rb20.

Second that...

Been there done that...

Was the best upgrade i ever did on my silver top RB20. Well that and a electronic boost controller.

[eXc]

Anyone know if the Series 1 is still worth putting on? Or should I wait to find a series 2?

Are there any identification on them to prove what series it is?

Cheers

Chris

[salad]

S1 is definitely still worth it

easy to tell the different compressors, one is aluminium and the other is nylon. they feel much different

and the number on the comp cover is different

i think the S2 has 45v4 and S1 has 45v3

may need someone to confirm, thats just going by my crappy memory

Edited November 1, 2006 by salad

[tiesto]

what is 45v2 then? cause i got it off a stagea.. s2?

[salad]

well i searched around a little and came up with the numbers on the turbos are kinda random...

this thread in particular

Edited November 2, 2006 by salad