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Noob Boost & Boost Gauge Help

Mayuri Krab
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Mayuri Krab Grand Master

Mayuri Krab

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Posted (edited)

Hey all, sorry if this is a noob/stupid question, but I want to know wether my car is boosting as it should be.

I have a dead stock auto R33 GTS-T (only mod is CAT, & a random "turbo" sticker :thumbsup: )

Heres what I learnt from searching the fourms so far:

-The stock boost gauge (R33) reads in 100 mmHgs, so 760mmHg = 1bar = 14.7psi.

-Stock boost for stock R33 should be 5psi (~260mmHg) upto 4500rpm then 7psi (~360mmHg) thereafter till redline.

-stock boost gauge from the R33 is not very accurate, but it should atleast be accurate enough for use as an rough indication right?

What I want to know is, on stock does the car only boost when you drive it properly (ie the way its meant to be driven,ie ie atleast 1/3 floor it)? Coz most of the time, I drive "normally" like my parents (ie grandma style), the boost needle never seem to go above 0, infact its mostly in the -ve region. Which means its not boosting right?

Only time I saw it going into the +ve region (only slightly, which I think is about 260mmhg ~5psi) is this one time on the free way I was overtaking a series of "even grannyer" drivers (some BMWs doing something like 65km/h on the free way :D ).

So basically is this normal, or do I have problems with my turbo or something? Sorry about the "noobness" of the question.

I know my way around the current generation of comptuers but don't know sh*t when it comes to cars.

Thanks all.

Edited by Mayuri Krab
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White GTS-T Mentor

White GTS-T

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Posted

From what you are saying, i would say your car is fine. Positive pressure is usually dependent of throttle percentage and how it is applied.

For example, if you ease onto the throttle in second from 1500rpm at 5% throttle to 3500rpm at 15% throttle you can stay in vacuum the entire time. But if you were to go from 1500rpm at 5% throttle to 3500rpm with say 50% throttle you would be making positive pressure (boost).

It's very dependent of the way you drive, hope that helps.

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