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R34 Gtt Stock Boost Gauge

Jay11

By Jay11,
in Engines & Forced Induction

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Jay11 Community Regular

Jay11

Posted
Posted

Hey I've installed a TurboTech manual boost controller on my R34 GTT,

I thought I would be fine reading the pressure from the stock gauge coz I have a conversion table that shows kg/cm2 to psi.

But I'm not full clear on the gauge itself, here it is below:

post-72359-1275046297_thumb.jpg

where it says "+1" (circled in yellow) does that mean 1 or is it an estimate of roughly 1??

In psi that would be 14.22psi.

So I'm assuming the line halfway between "0" and "+1" is 0.5 which would be 7.11psi.

This would mean if I'm wanting 10 psi then I would want it at where the green line is, 0.70 kg/cm2 = 9.96psi.

Can someone please help me out here. The last thing I want is for it to be boosting at 15psi and ending up with bits of ceramic through my engine.

Thanks in advance!

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snozzle Mentor

snozzle

Posted
Posted

dont rely on the readings of that gauge, they are not accurate enough, get a decent one

a friends r34 was boosting to that green line on the gauge u pointed out, installed a set of aftermarket gauges, it was actually boosting to 14psi.. lol

mad082 Grand Master

mad082

Posted
Posted

as said above, the gauges aren't exactly accurate. often the higher the boost the more inaccurate they get, and they often read lower than what the actual boost level is. my advice would be to go and buy a cheap boost gauge. even one of those drift ones for $50 will be much more reliable than the stock one.

Jay11 Community Regular

Jay11

Posted
  • Author
Posted

True, damn that sucks I like the look of these.

Do you know if it's easy to install one where the stock gauge is at the moment in that cluster?

I really don't want a random boost gauge on my dash or anything, want to keep it as stock looking as possible.

Flargh! Enthusiast

Flargh!

Posted
Posted
True, damn that sucks I like the look of these.

Do you know if it's easy to install one where the stock gauge is at the moment in that cluster?

I really don't want a random boost gauge on my dash or anything, want to keep it as stock looking as possible.

You could get the nismo tripple gauge cluster to replace the standard unit.

jrm Veteran

jrm

Posted
Posted

Whilst the nismo unit reads up to 1.2 bar compared to the standard gauge, it's still very difficult to get an accurate reading from.

The map sensor itself thats the sender for the boost gauge itself is reasonable accurate (watching the results on an MFD screen you can get quite accurate results against a regular boost gauge) - it's just a shame that Nissan provided a gauge that it's impossible to determine the 'real' boost level you're receiving.

scotty014 Veteran

scotty014

Posted
Posted

i upgraded my gauges because my boost one would sometimes not work and from what i found out when it was working it was not accurate at all so now my setup it this:

post-41669-1275096857_thumb.jpg

which i think gauges like this look better than the stock ones, even the cheaper brand gauges like calibre etc. look better in my opinion.

Flargh! Enthusiast

Flargh!

Posted
Posted
Whilst the nismo unit reads up to 1.2 bar compared to the standard gauge, it's still very difficult to get an accurate reading from.

The map sensor itself thats the sender for the boost gauge itself is reasonable accurate (watching the results on an MFD screen you can get quite accurate results against a regular boost gauge) - it's just a shame that Nissan provided a gauge that it's impossible to determine the 'real' boost level you're receiving.

Agreed. They are severely lacking in graduations on the dial.

paulr33 Grand Master

paulr33

Posted
Posted

i get that guages can become inaccurate over time due to wear and tear etc

but if you find vast inconsistencies between readings and two guages

check for obvious issues and problems

check for leaks, check for damaged vac lines (common with cheap ones) - heat & pressure makes them split

check where the OEM one is reading from vs your aftermarket one - are they reading from the same place?

Noclue Explorer

Noclue

Posted
Posted
i upgraded my gauges because my boost one would sometimes not work and from what i found out when it was working it was not accurate at all so now my setup it this:

post-41669-1275096857_thumb.jpg

which i think gauges like this look better than the stock ones, even the cheaper brand gauges like calibre etc. look better in my opinion.

Yes! mine sometimes doesn't work too!

Jay11 Community Regular

Jay11

Posted
  • Author
Posted
Stock gauges are never accurate. It's just an indication. Anyway, who looks at the dials when driving hard? :)

yer I don't care bout lookin at it while driving. It's just to make sure I set the boost right, and to make sure it doesn't creep or anything. So only 60mm gauges can fit?

I like the look of the autometre ones but I don't think they make it in 60mm.

666DAN Grand Master

666DAN

Posted
Posted

My factory one is bang on correct (or should I say dead on with the dyno pressure sensor) yet both would indicate my Apexi is telling big fat lies (And I truly think it is) 1.3 bar my arse.....everything else says 1.1 bar

  • 2 weeks later...
666DAN Grand Master

666DAN

Posted
Posted
My factory one is bang on correct (or should I say dead on with the dyno pressure sensor) yet both would indicate my Apexi is telling big fat lies (And I truly think it is) 1.3 bar my arse.....everything else says 1.1 bar

Well my car must have heard me, the apexi (after 3 years) now correlates correctly with the factory one, who knows why it's been out for so long from brand new and why it changed overnight??????

Jay11 Community Regular

Jay11

Posted
  • Author
Posted
Well my car must have heard me, the apexi (after 3 years) now correlates correctly with the factory one, who knows why it's been out for so long from brand new and why it changed overnight??????

Haha tru.

Hmm I think I might just stick with the stocko's for the moment, gotta buy new coils and spark plugs and few other stuff first.

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