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Greddy Profec B Spec 2, PSI display... extremely inaccurate

Old 04-22-2007, 08:10 PM
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Default Greddy Profec B Spec 2, PSI display... extremely inaccurate

So I've been using my profec b for the last year and I have it set to display in PSI. I never really paid attention to it because I have a boost gauge infront of me and my controller hidden. I have always noticed that the profec displays the current PSI on the display inaccurately.

Is it just my unit or has others experiance this too? For example, my boost gauge would read 10psi but my profec would display 19psi. My gauge would read vaccum at -20/30 at idle but my profec would display -80. I have everything routed correctly plus I am using the supplied hoses. Nothing is kinked and everything works fine. Am I reading it wrong, is it not real PSI but I still have to multiply it or something? Inputs please...
Old 04-23-2007, 01:57 AM
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mine too, all the same symptoms
Old 04-23-2007, 04:08 AM
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Default Re: (mrbsponge)

I have sold 100s of these, Most we've tuned. I havn't seen any issues with these, They have all been on the money compared to logging with Hondata and other gauges.
Old 04-23-2007, 05:38 AM
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Default Re: (CRVRX)

it reads in a different increment of vacuum i do believe. Ive never had issues with it reading boost improper except for when you let off after a pull, it will usually show 1 psi higher than it actually made, like it catches a slight peak or something.


Modified by SPOOLINmatt at 11:20 AM 4/24/2007
Old 04-23-2007, 07:54 AM
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hm so whats going on? some say its on the dot, others have the same problem?
Old 04-24-2007, 06:49 AM
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anybody else?
Old 04-24-2007, 07:20 AM
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Default Re: (rebo0t)

i had several of them and all of them have done the same thing as what i said above including friends that i set for.
Old 04-24-2007, 08:58 AM
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Biggest Piece of **** ever...get a manual controller or a Turbo XS Dual Stage and call it a day, please...
Old 04-24-2007, 11:17 AM
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I sold mine before installing it and bought a Profec Type S. It's been perfect.
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