R34 RB25det boost 0.5 change to 0.7 bar

[JC71]

I find this info on line in a few spots claiming a wire connection change will change standard boost limit, but can any confirm that this is true and any pic or help if it is true?

thanks

 

info below

Standard Boost is 2 stage. 0.5 bar until NVCS (about 4.5k revs), then 0.7 bar until 7k rev standard rev limit. This helps maintain fuel economy and keeps it drivable in slow traffic, the stage 2 boost option is usually the first thing an RB25 tuner will do and makes an easy power gain.

The mod involved quite simply cutting the black wire on the solenoid and connecting this to ground on the car body, forcing the car to stay in stage 2 boost all the time.

There are plenty of detailed step by step instructions around in our forum, and many popular skyline forums out there

[KiwiRS4T]

Yes

There are plenty of detailed step by step instructions around in our forum, and many popular skyline forums out there

(This is your cue to Google the question).

 

[GTSBoy]

Numbers are wrong.

stock wastegate is 5 psi. When teh bleed solenoid is activated it is 7 psi. These are not 0.5 bar and 0.7 bar. and it has nothing in particular to do with VCT.

[trel]

It's also the first step of Frankensteining a car. Just get a manual boost tee and wind it up to 10psi no more and the stock ecu will handle that. No butchering wires required and can be removed if need be.

[JC71]

I did google and msn search this and came up with nothing.

 

[JC71]

so an adjustable wastegate would be the better way to go or  a manual boost T setup?

instead of a wire connection change?

 

my first turbo setup I've ever owned so please forgive if questions seem dumb

Edited May 7, 2020 by JC71

[JC71]

just found a thread on here about it, very informative

 

 

[GTSBoy]

There would have to be 20000 posts on SAU about it.

Just put either manual boost T or a proper EBC on the car. It's not 1997 any more.