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So I Installed A Boost Guage...

NateR31

By NateR31,
in Engines & Forced Induction

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NateR31 Grand Master

NateR31

Posted
Posted

Hey guys, i think i have a little problem, i have a rb25det shoveld into a R31, its got a 3inch dump and then to the stock rb30e exhust(around 1inch :lol:, im poor, not zorst yet) I connectd the gauge to the piping that goes to the stock boost relay in a R33, now was i right todo this? :), i know that the ehuast is really killing the power, but should there be anyreason for it not to boost to 7psi. It stays pretty firm on 5psi, and i dont know whats going on.. Any idea guys? Oh and i have the stock side mount cooler..

thanks

Nate

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RB30-POWER Mentor

RB30-POWER

Posted
Posted

I would say the solonoid is wired incorrectly. (Considering its a conversion)

The stock wastegate pressure on RB25 turbo's is 5 psi.

You only get 7 psi when the solonoid gets power and opens by the ecu at 4500rpm and bleeds off a little air to increase boost.

The ecu provides earth to the solonoid, so the other side should be +12V anytime the ignition is on. (This is the part that won't be wired my guess)

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