Stock rb25 turbo boost pressure?

Discuss the RB20, RB25 and RB26 series engines.
DLeeTT
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Joined: Wed Oct 26, 2011 8:50 pm
Location: FLorida

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I tried searching and mostly got results of max boost. I'd like to know what is the stock pressure of the stock turbo so when I get this thing running, I know it's set right. Thanks.


Darius
Posts: 4820
Joined: Sun Mar 02, 2003 9:48 am
Car: RB25DET S14 - 665 WHP (SOLD)
Location: Chicagoland

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If I remember correctly, stock boost is 5psi and it steps up to 7psi via the boost control solenoid on the waste gate actuator.

DLeeTT
Posts: 60
Joined: Wed Oct 26, 2011 8:50 pm
Location: FLorida

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hmmm i don't think my swap came with a boost solenoid... guess it should be at 5psi then?

andres14oj
Posts: 19
Joined: Sun Jul 24, 2011 1:49 pm

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7 actually. the boost solenoid controls your wastergate actuator to open up early at 5 psi during low rpms i bealive. without it u run 7. this solenoid is bolted on the power steering reservoir

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jbracy7
Posts: 1039
Joined: Sat Jan 13, 2007 8:39 pm
Car: 94 GTS TYPE-M in a dozen pieces
Location: S.A. TX

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My rb runs at 1.6-2.1 ish bar not sure how to convert that into psi

DLeeTT
Posts: 60
Joined: Wed Oct 26, 2011 8:50 pm
Location: FLorida

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1 bar is close to 15 psi

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jbracy7
Posts: 1039
Joined: Sat Jan 13, 2007 8:39 pm
Car: 94 GTS TYPE-M in a dozen pieces
Location: S.A. TX

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^ really I don't think my gts stock then I should have known from the tommy akira bits and pieces p.s. I'm not spelling this guys name right my japanise is high school level at best

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LSDrift
Posts: 200
Joined: Wed Apr 19, 2006 4:54 am
Car: 1990 RS13 RB25

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That would mean you are running 23-30 psi. And it's Tommy Kaira just fyi...definitely not stock boost lol. Darius is correct. If you have a vac hose going from the wastegate directly to the intake manifold you should see 7psi.

DLeeTT
Posts: 60
Joined: Wed Oct 26, 2011 8:50 pm
Location: FLorida

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Thanks

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jbracy7
Posts: 1039
Joined: Sat Jan 13, 2007 8:39 pm
Car: 94 GTS TYPE-M in a dozen pieces
Location: S.A. TX

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Now I must get my car together,lazzines be gone

DLeeTT
Posts: 60
Joined: Wed Oct 26, 2011 8:50 pm
Location: FLorida

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jbracy7 wrote:Now I must get my car together,lazzines be gone
That is my curse as well

mixeds14
Posts: 601
Joined: Tue Feb 26, 2008 12:44 pm
Car: 240
Location: nc

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Make that three.. I feel lazyyyyy as I type this s***


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