Boost Problem

[_MRR33]

Hey there,

I've just noticed this today, as I don't really boost my car often but after I took it for a run to make sure it was running well after I was working on the motor I noticed that the car is only boosting to about 2-3PSI?

It had a boost control on it, which was turned right down because I just had a forged rebuild so I took off the boost control and connected it normally, still seems like it's only boosting at 2-3PSI on the stock boost guage as well as a aftermarket boost guage.

Any ideas? All hoses etc seem to be connected well checked everything I could...

[Dose Pipe Sutututu]

Seized up BOV, all your boost leaking out..... never know happened to me.. so I got another stock BOV off some dude on this forum... problem fixed..

[sky017]

iv got the same problem . happened yesterday - im only reachin 3-5 psi in 2nd gear , 9 psi in 3rd = stock boost btw .

[WazR32GTSt]

when you say 2-3,do you mean 2-3 on the stock gauge?

because that is normal...

[T04GTR]

hmm. well your gonna have to give it a quick checkover.

check the wastgate actuator rod hasnt poped off the turbo wastegate flap.

all hoses tight?

[_MRR33]

when you say 2-3,do you mean 2-3 on the stock gauge?

because that is normal...

Yeah, I do mean on the stock guage. My other guage ain't that great so I can't go off that either.

I'll go over the car this weekend T04GTR make sure all that is alright.

But, Waz - so it's normal only to go to 2-3PSI on the stock guage then? So, It's just me?

[Trav33]

The stock boost gauge on a 33 GTS-T isn't measured in psi, its in x100 Torrs... a Torr is x200 psi or something like that.

So 1 on the gauge = 2 psi

or 2-3 on gauge = 4 to 6 psi = normalish

[RANDY]

Stock boost under 4500rpm is 5psi and 7psi over that.

So 7 on the guage is 7000mmHg or whatever the multiple is, which is about 1 bar I think? So you should see about halfway between 0 and 7 when on full boost.

[WazR32GTSt]

stock gauge is in mmHg (that millimetres of mercury)

and the conversions are: 760mmHg = 1bar = 1atmosphere = 14.3(ish) psi

and the stock gauge is read at x100mmHg

so...

+7 on the stock gauge actually means 700mmHg which is a tad under 14psi

and so on a stock R33, which runs 5psi then 7psi higher in the rev range, you would expect the stock gauge to read between +2 and +4 on the stock gauge

that is 100% normal

from my experience, the stock gague is pretty accurate. its flaws are that is it hard to read because of its units aren't commonly talked about, its in a hard position to see, and that it can't read over 14psi