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R33 GTR turbo's vs R32 GTR turbo's

Godzilla32

By Godzilla32,
in Engines & Forced Induction

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cowie165 Veteran

cowie165

Posted
Posted
What are the differences?

***

from HPI #51, "RB26 Evolution"

Unbeknownst to most is the differences between R32 and R33 GT-R turbochargers. There are differences no so much in the exterior housings, but in the compressor wheels and in turn the dump pipes, which allow a stock-turbo R33 with bolt-on mods to make significantly more power than its R32 equivalent.

Both of these versions carry the handicap of ceramin turbine wheels though. Whereas 1.2-1.3bar of boost pressure on the R34 turbochargers is a 'gimme', the wise tuner keeps the boost under 1.1bar on the early models and leaves it at that.

***

It seems that no-one actually knows specifics...

but I hope this helps a little

pnblight Mentor

pnblight

Posted
Posted
***

from HPI #51, "RB26 Evolution"  

Unbeknownst to most is the differences between R32 and R33 GT-R turbochargers. There are differences no so much in the exterior housings, but in the compressor wheels and in turn the dump pipes, which allow a stock-turbo R33 with bolt-on mods to make significantly more power than its R32 equivalent.

Both of these versions carry the handicap of ceramin turbine wheels though. Whereas 1.2-1.3bar of boost pressure on the R34 turbochargers is a 'gimme', the wise tuner keeps the boost under 1.1bar on the early models and leaves it at that.

***

It seems that no-one actually knows specifics...

but I hope this helps a little

do not run 1.2 to 1.3 on r34 turbos they go bang to, trust me i know

yeah say bye bye to ceramin no matter what model R it is , it will save you money in the end

GTR R32 Collaborator

GTR R32

Posted
Posted

I think it will be fine to use R32 and R33 GTR turbos together. If there are any differences in compressor wheels they would be very minor. I'm still unconvinced though that there are any differences at all. The "GT-R Owners Book" I bought from Japan shows the difference between all factory turbos. From the specs listed there is NO difference. Yes the dumps are different though.

That particular article in HPI #51 has so many errors in it. Almost all of the information about the R34 motor is completely wrong. Other articles lately have had wrong information too. Unfortunately, you can't believe everything that you read in a magazine.

cowie165 Veteran

cowie165

Posted
Posted
That particular article in HPI #51 has so many errors in it.  Almost all of the information about the R34 motor is completely wrong.  Other articles lately have had wrong information too.  Unfortunately, you can't believe everything that you read in a magazine.

Gary could you please elaborate on your post? :confused: I have little love for HPI on the whole, and would love to have the story set straight.

Did you respray it after you imported it or sumthing?

Without making disparaging comments about import brokers, suffice to say the description of the car was missing quite a few important (and obvious) details. I don't mind sharing, so if you are interested in hearing more, beam over a PM :P

GTR R32 Collaborator

GTR R32

Posted
Posted
Gary could you please elaborate on your post? :confused: I have little love for HPI on the whole, and would love to have the story set straight.

Well here are a few things they said about the R34:

1. "R34 turbos are a spitting image of an R33 GTR N1 turbo" - WRONG

They are completely different. Different housings and different wheels.

2. "R34 GTR cams have alterted duration and lift" - WRONG

The cam duration and lift are the same for all GTR's. The difference in the R34 cams is the "lobe centre angle" (cam timing). Basically the R34 cams are like having R32/33 cams with cam gears set at 4 deg advanced intake and 4 deg retarded exhaust.

3. "R34 cams won't fit in an R32/33 head" - WRONG

They sure do. There are many people that have done it. The difference is in the connection to the crank angle sensor. The R34 CAS will not fit into R32/33 cams or vise versa.

4. "R34's have a completely recast head"

I don't think so. There may be some minor changes though. I know SK said they have different squish zones. Maybe someone who has properly compared the two can say.

5. "R34 blocks have extra ribbing like N1 blocks to avoid cracking"

My understanding is that N1 blocks are actually made from a different material to provide the extra strength. I have a photo with a comparison of the standard block (05U), N1 block (24U) and the Group A block. It's very hard to see any differences. If only I could read japanese better, then I would know. I'd like to see where the extra ribbing is that they talk about. As for the R34 block they are still stamped with 05U and I don't think they are any different. Plus my tuner has seen them crack before. Again if someone has compared the two properly I'd like to know.

It's just annoying when rumours spread and then end up in magazines.

lwells Grand Master

lwells

Posted
Posted

Gary,

Does that GT-R handbook list the stats for the R34 N1 GT-R turbo? If it does, and you don't mind, can you post up all the dimensions? Just trying to compare to other options as per this thread: http://www.skylinesaustralia.com/forums/sh...ead.php?t=80624

Cheers,

Lucien.

Godzilla32 Veteran

Godzilla32

Posted
  • Author
Posted
I have a photo with a comparison of the standard block (05U), N1 block (24U) and the Group A block. As for the R34 block they are still stamped with 05U and I don't think they are any different.

Only saying wat i read...

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