R34 N1 Turbo Variants

[Don Dada]

Hey guys anyone know the difference in spool / response and outright power between the two variants of the R34 N1s ie. the one the 0.6 a/r compressor compared to the 0.42 a/r

It seems every thing is identical besides for the comp a/r and i cant seem to find anything on the larger one

http://homepage.ntlworld.com/tbroom/Turbos.htm

ooh... Are the exh manifolds off the R34 N1/nur engine the same as a standard rb26? ...These are the gold-ish cover engine right?

Edited October 24, 2010 by Don Dada

[paulr33]

are you sure one of the BNR34's is a 0.42a/r compressor?

from memory only BNR32/BCNR33 is 0.42a/r front whereas BNR34 is 0.53a/r and thats for the std trim items, never heard of 0.42a/r BNR34 stockers, let alone N1 or nismo items

[The Dan]

^^ +1

[Don Dada]

Well i'm going from the attached link which everyone seems to use as well and yes the R34 ceramic stockers are 0.53 a/r while the N1 (14411-AA403) are 0.42 a/r

[paulr33]

just doesnt make sense, why have a smaller compressor cover for an N1 variant ?

ill check the data tonight when i get home, the row is probably wrong

[Beer Baron]

yeah there are definitely R34 N1s with .64 exhaust AR and 0.42 comp AR and ones with same exhaust but .60 comp AR. guys AR is not the size of the thing. it's a ratio. ratio of area to radius. yes generally housings with a smaller AR ratio are physically smaller but it's not necessarily true, they are a different shape. size of wheels etc is needed too so you can tell if a turbo is physically bigger or smaller and it's power potential.

[Don Dada]

Yea if u look at the oem R34 ceramic turbo with the 0.53 a/r it is physically smaller than the earlier R32/33 turbos with the 0.42 a/r

I'm thinking due to wheel design efficiency it allowed them to run a smaller a/r on the last of the N1 turbos (aa403) yet maintain good flow... same as the N1 equivalent the -7 and the even more efficient -9 which both use 0.42 comps as well

http://www.turbobygarrett.com/turbobygarre...0R_707160_7.htm

http://www.turbobygarrett.com/turbobygarre...9R_707160_9.htm

[Beer Baron]

exactly. the 0.53 AR R34 standard turbo is a physically smaller housing than the 0.42AR R34 N1 housing. they are a good thing. I think from memory GT-SS are 0.64 AR rear and 0.42 AR comp too? could be wrong that's off the top of my head. but as you say there is a garret equivalent bolt on turbo for GTR in the same 0.42 comp AR with 0.64 AR rear.