BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 (edited) ]mines actually on +5 on idle...(auto) and jumps to 20 when i rev out its a mechanical cobalt series boost/vac gauge i just tap'd it into the line at the front of the manifold like described in a step by step posted on here i know its wrong coz my stock gauge sits in the - and jumps accordingly.. Edited May 31, 2011 by nismo07 Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842449 Share on other sites More sharing options...
BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 any idea's? Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842544 Share on other sites More sharing options...
GT32 Posted May 31, 2011 Share Posted May 31, 2011 (edited) any idea's? Hmm, not sure. I've always tapped boost gauges directly off the plenum itself. Never really tried to tee it off an existing line. It definitely should be reading somewhere in the negatives on idle though. Edited May 31, 2011 by GT32 Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842622 Share on other sites More sharing options...
BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 Hmm, not sure. I've always tapped boost gauges directly off the plenum itself. Never really tried to tee it off an existing line. It definitely should be reading somewhere in the negatives on idle though. Was thinking maby trying it at the rear where the stock line goes in from the little box right near the brake booster? if i was to pull that off and run the gauge straight in be fine right? doesnt matter if i disconnect the stock gauge at all does it?? Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842715 Share on other sites More sharing options...
GT32 Posted May 31, 2011 Share Posted May 31, 2011 Nah won't matter if the stock gauge is disconnected or not. Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842719 Share on other sites More sharing options...
BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 Ran the tube from the gauge straight into the plenum and still same result.. got me stumped maby my gauge is faulty or something from factory :S Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842813 Share on other sites More sharing options...
BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 also shouldnt the gauge reset to 0 when the ignition is off? it sits on 15+ ?? Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842827 Share on other sites More sharing options...
GT32 Posted May 31, 2011 Share Posted May 31, 2011 Hmm, you could be right. Possibly a faulty gauge. I used to have an Omori boost gauge on my old 32. The gauge looked ancient! Was a mechanical type and I remember it was always 1-2psi out. When I had the car dynoed a few years ago, their dyno chart always displayed 1-2psi higher than what the boost gauge in the cabin displayed. It was probably due to wear and tear though. Is the gauge you're using brand new or second hand? Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842838 Share on other sites More sharing options...
BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 Hmm, you could be right. Possibly a faulty gauge. I used to have an Omori boost gauge on my old 32. The gauge looked ancient! Was a mechanical type and I remember it was always 1-2psi out. When I had the car dynoed a few years ago, their dyno chart always displayed 1-2psi higher than what the boost gauge in the cabin displayed. It was probably due to wear and tear though. Is the gauge you're using brand new or second hand? Brand new from autobarn was a cobalt autometer so thought it was quality rofl... Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842843 Share on other sites More sharing options...
GT32 Posted May 31, 2011 Share Posted May 31, 2011 Hmm, could be faulty. Bring it back and exchange it for another one to see if it still does the same thing. I'm not even gonna bother using a conventional boost gauge this time around in my new car. Once my AVC-R goes in then I'll just rely on that from now on to show me how much boost I'm running. . Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842859 Share on other sites More sharing options...
GT32 Posted May 31, 2011 Share Posted May 31, 2011 also shouldnt the gauge reset to 0 when the ignition is off? it sits on 15+ ?? Sorry, didn't see this. Yes it should revert back to +-0 when the ignition is off. If it sits on +15 then there definitely is a problem lol. Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842882 Share on other sites More sharing options...
BrOwnY GT Posted May 31, 2011 Share Posted May 31, 2011 Yea what i thought lol ill return it tommorow and wait another 4 days another to come in lol... sigh... first time ive had issues with autometer though :S Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842901 Share on other sites More sharing options...
GT32 Posted May 31, 2011 Share Posted May 31, 2011 Yeah Autometer is normally quite good. I'm actually using a mechanical Autometer boost gauge on my car at the moment and it's very accurate. Shame it's about to get ripped out though. Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5842944 Share on other sites More sharing options...
BrOwnY GT Posted June 1, 2011 Share Posted June 1, 2011 definitely was the gauge lol... funny on the phone to them were trying to blame installation but once they actually looked at it they said "yea its stuffed"... lol dont know how it could be my fault when the needle resets to +15psi and wont go below 5+ anyways yea overnight delivery Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5844036 Share on other sites More sharing options...
GT32 Posted June 1, 2011 Share Posted June 1, 2011 Haha, I love it when retailers will firstly always try and blame the buyer or installation to try and cover their own arses. Whatever happened to good old decent customer service these days... Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5844751 Share on other sites More sharing options...
Mayuri Krab Posted June 1, 2011 Share Posted June 1, 2011 kool on another note what should the boost be reading on idle?? -7 like the stock gauge? Different units, the stock gauge reads in mmHg x100 for both positive & negative pressure. Most aftermarket boost gauge will read in inHg for negative & either PSI or Bar for positive pressure. 15 - 20 inHg is the norm for idling pressure with the car stationary, anything lower than 15 inHg & you may have a leak somewhere. Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5844775 Share on other sites More sharing options...
Addicted2BoostR34 Posted June 1, 2011 Share Posted June 1, 2011 anyluck ? Link to comment https://www.sau.com.au/forums/topic/340243-boost-gauge-reading-wrong/page/2/#findComment-5844860 Share on other sites More sharing options...
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