stock rb25 turbo questions

Discuss the RB20, RB25 and RB26 series engines.
silviasgp06
Posts: 418
Joined: Mon Apr 02, 2007 1:12 pm
Car: 95 Nissan Zenki RB25 Powered

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rb25det turbo questions

Ok I did a little searching and cant find exactly what im looking for.I know theres after market turbo options but im curious about stock nissan turbo possibilities.

question one:Knowing that you cant boost past lets say 13psi safely on the rb25's ceramic turbo, what amount of to the ground horse power will the rb25 make safely on the stock turbo and injectors?

question two:If i was to buy a turbo that went to a z31t,or any other vg30det motors, what is that turbos max safe boost levels, and what can i expect to make to the ground since with that turbo it would be possible to go past 1bar.

question three:What are the specs of these turbos(rb25's and vg30det's)? ie: AR's, cfm,trim....

question four: are there any good turbos that come off of other motors that are worth mentioning?


Fearsome_tea
Posts: 147
Joined: Sun Apr 15, 2007 6:45 am

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What are you trying do and what are your power goals?

Sil240
Posts: 2973
Joined: Mon Apr 28, 2003 5:26 pm
Car: Nissan S13 "The One Cam Wonder"

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Answer 1 & 2Check SAU they have Dynos and Mod lists.From what I've seen-RB25- about 275 WHP

VG- about 300Whp

Answer 3I don't think anyone actually knows.If you can find it, you'll win a prize.Roughly from what I've heard.

RB25- T3 compressor/ T28 ish turbine w/ a T3 flange. Ceramic turbine wheel, Ceramic Ball bearing.Oil and water cooled.

VG30et- Straight T3 Oil only.Plain jane T3. Gets the job done though.

Answer 4Holset Hy35 or HX30 (about a midsized t3/t4)Dodge 6.5 Diesel Automatic

Answer 5-SEARCH is your Friend

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