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RD28 Inlet relief valve question

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 137
Joined: Wed Jan 30, 2008 6:00 pm
Location: Neverbinere

RD28 Inlet relief valve question

Post by adriand82 »

Hi guys. Curious as to what PSI it takes to open the relief valve that everyone blocks off in the front of the inlet plenum on the 2.8 turbo??
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Re: RD28 Inlet relief valve question

Post by 8maddog8 »

adriand82 wrote:Hi guys. Curious as to what PSI it takes to open the relief valve that everyone blocks off in the front of the inlet plenum on the 2.8 turbo??
Not sure, i just blocked mine off.

If you want to know, go get a spring and measure the force to open it.
'96 GQ Wagon, RD28T @ 13psi and now Intercooled, 2 3/4" straight through, 2.5" + 2" Lift, 33's, front detriot locker, 12,000lb winch, snorkel, etc...
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Post by PBBIZ2 »

I was told 15psig by the nissan dealer. My turbo boost gauge won't register higher than 10psi so the wastegate is still working ok. Also got this number from another guy who changed his turbo, achieved more boost and had to remove the valve also, as it started o chatter around 15psi.
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Location: Melbourne

Post by 1TUFFGQ »

Mine kept opening at 7psi(faulty) so I just plugged it with a black plastic screw plug from the plastic plumbing section at bunnings.
GU Patrol intercooled TD42T, lifted, Cheezy sliders, ARB air locker, beadlocked Claws, Warn winch
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Posts: 137
Joined: Wed Jan 30, 2008 6:00 pm
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Post by adriand82 »

Thanks for the help guys, looks like plugging the thing up is the most reliable way to go.
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