R34 & R33 S2 Turbos Better? Why?

[levizzle]

I have been looking through lots of pages lately for a better turbo for my RB20. I have figured anything newer is better than what I have but why are series 2 r33 turbos better than series 1, and i am guessing r34 turbos are better since they are similar to r33 series 2. Has it got something to do with the nylon wheel? Does it make it easier to spool faster compared to steel? And why do some turbos have twin blade and some single. I saw someone say it doesnt help either way. I was just wanting other peoples opinons or knowledge on why newer ones are better and the theory behind it, so... discuss

[Harey]

I am not sure about the real tech stuff on the differences. I just know the R34 turbo has a much bigger exhaust housing (its called OP6). The exhaust side of the turbo is the restriction on these cars, so the larger exhaust housing is a better solution.

[PROXIMITY]

very late model r33's also come with OP6 rear housing, it just makes more top end power, but makes boost come on a lil later.

And the nylon wheel gives better boost response, which is used in R33 II and r34, the twin alloy blade is in series I.

Just looked at your avatar,i use both 34 and 33 sII on my rb20's and i prefer the 33 comes on much quiker, i dont like the OP6 on them.

Only get the Op6 if your getting Hypergear to do one of its big highflows for max rwkw.

Edited March 4, 2010 by PROXIMITY

[R31Nismoid]

R34 Turbo's have a larger rear housing. OP6 will signify the larger housing and thus a R34 item.

R33 Turbos S1 & S2, for all intents and purposes are identical. (there is a minor exception, but forget about it for the majority).

R34 turbo will come on a tad later, its nothing major. Will make a tad more power, better for hi-flowing. That's about it.

If you only want 170-190rwkw, just get a R33 turbo, 14psi and off you go. Cheapest solution for the result.

[levizzle]

Awesome, thanks for the great replies! I was thinking R33 would be best but just saw some R34 turbos on ebay starting cheap and thought I could use that. One on there is a garrett and they were told it was from a Nissan R34, I have heard that garrett made some turbos and I asked if it had OP6 on it and they couldnt see it on there, so is it still from a R34?

So concluding from what you guys have said, R33 turbo is less laggy than R34, series 2 with nylon wheel can give better boost response so would be better. So anyone got a cheap R33 series 2 turbo for sale? :-)

[PROXIMITY]

R33 Turbos S1 & S2, for all intents and purposes are identical. (there is a minor exception, but forget about it for the majority).

How is nylon wheel SII identical to a twin blade alloy wheel on a SI.

The nylon wheel comes on near 500rpm faster and is slightly larger.

Have seen a few cheap on the forums lately around $250, keep checking regularly.

Or try Bill at Ats , was some months back when he done some work for me and said he sells them around $350.

With all other mods expect close to 200rwkw depending on health of engine.

Edited March 5, 2010 by PROXIMITY

[R31Nismoid]

I said for all intents and purposes.

Meaning simply - whilst they are different, the end result offers zero performance difference. There is no way there is a 500rpm difference between the two.

There is not one credible shred of proof that to back up some wild claim on 500rpm. If there was, everyone would be making a major deal out of it i can assure you 500rpm gain people would be swapping stock turbos out as it's probably one of the best bang for buck mods (if it were true).

So having a S1 or a S2 turbo makes no difference.

[PROXIMITY]

Sorry i understood it as no differences only minor not mentionable.

I have a r32,r33 and a ceffy currently, i have changed between all these turbos mentioned, and from my experience i believe the nylon wheel does come on much faster and pulls harder.

And i said near 500rpm.

i have had this conversation with a reputable Turbo dealer here who says same thing.

Also having a non tuned rb20 stock ecu running 13psi with a sII turbo making 197rwkw says something aswell, when all the s1 with same mods make around 180-185.

My 2 cents not having ago, just saying what i have experienced, and i dont think Nissan just changed to nylon for no reason.

Edited March 5, 2010 by PROXIMITY

[PROXIMITY]

http://www.skylinesaustralia.com/forums/Wt...im-t309918.html

r34 turbo and r33 turbo in this wtb thread both in adelaide.

[levizzle]

Definitely the word on the street is series 2 is ahead of series 1 turbo, whether an inch or a mile its there considering everything I have read. Better start saving my cash for one :-)

[mad082]

Sorry i understood it as no differences only minor not mentionable.

I have a r32,r33 and a ceffy currently, i have changed between all these turbos mentioned, and from my experience i believe the nylon wheel does come on much faster and pulls harder.

And i said near 500rpm.

i have had this conversation with a reputable Turbo dealer here who says same thing.

Also having a non tuned rb20 stock ecu running 13psi with a sII turbo making 197rwkw says something aswell, when all the s1 with same mods make around 180-185.

My 2 cents not having ago, just saying what i have experienced, and i dont think Nissan just changed to nylon for no reason.

s1 and s2 r33 will make the same power as the nylon compressor wheel has pretty much no bearing on max power only spool up time. also from my experience the spool up time difference between the 2 is extremely minimal and would more come down to the individual tune of the car. an engine with higher compression or more advanced timing will make the car spool up quicker and pull harder.