boost gauge question
#2
Autometer is not an expensive gauge. At least not the mechanical ones, they ALL have the needle move away from the zero after time, i have seen ones up to 3psi away.
Defi, GReddy, SPA Design. All quality, Autometer not so much.
The chinese stuff is copied so well, there isnt much difference. Until you get into non mechanical gauges, where basically everybody is good.
#5
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The mechanical gauges, as explained, are terribly inaccurate. But that's not what makes them useful. You watch them for trends, not for exact values. IE if you normally idle at xx vacuum, and the car starts to run like **** and your gauge shows less than xx vacuum, you know you have a vac leak. Or if you're used to seeing YY PSI boost at WOT, and you see way more or way less, you know you have a problem, etc.
If you want accuracy, get an electronic gauge. Or an EBC with a gauge display.
If you want accuracy, get an electronic gauge. Or an EBC with a gauge display.
#9
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never seen an autometer that read 0 at 0 psi. look at them at any store.
never seen an adjustment on one either.
i suspect it's the internal damping preventing it from reaching 0 and that the fluid damped ones are better but i'm not positive.
never seen an adjustment on one either.
i suspect it's the internal damping preventing it from reaching 0 and that the fluid damped ones are better but i'm not positive.
#11
lmao braineack its funny you say that because i did the same **** the other day. It was pissing the hell outta me so i ripped the glass off the gauge and adjust the needle where i wanted it. 2 seconds later it was back to 2 psi on shut off. I really want the AEM electronic boost gauge cuz i think it would match my aem uego wideband that i just bought
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If you want accurate, get a MAP sensor. If you need to know ballpark, condition of tune, trends, etc, the mechanical gauge is perfect.
#20
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scaling and zeroing are different things. I'm curious what you'd see if you put a vac pump on it and checked the calibration. zero is pretty unimportant compared to peak boost if engine life is your concern.