1st Gen GP Most liked posts in thread: GP Intercooler wanted

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  1. UKXPAT

    UKXPAT New Member

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    #42 UKXPAT, Mar 22, 2010
    I got Jan's (RMW) old Scangauge II. Not sure if he ever set it up completely, but what do I need to do to get accurate MAP readings. I hear about the 'subtract 14.5', but at low rpm I would have a negative number if I did this. What kind of readings should I expect to see? This may mean Jan set it up for CA. I still need to set up for DFW area in TX, so an advice would be welcome.
     
  2. Nathan

    Nathan Founder

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    #43 Nathan, Mar 22, 2010
    You should see negative numbers unless on boost. Remember the engine pulls a vacuum when not boosted.
     
  3. BlimeyCabrio

    BlimeyCabrio Oscar Goldman of MINIs
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    #44 BlimeyCabrio, Mar 22, 2010
  4. UKXPAT

    UKXPAT New Member

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    #45 UKXPAT, Mar 22, 2010
    I see positive. About 8.0 at idle.
     
  5. BlimeyCabrio

    BlimeyCabrio Oscar Goldman of MINIs
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    #46 BlimeyCabrio, Mar 22, 2010
    That's MAP, not boost.

    8 psi MAP is about -6 psi boost (vacuum).
     
  6. Newbs49

    Newbs49 New Member

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    #47 Newbs49, Mar 23, 2010
    Your about right. Idle should be about -10
     
  7. UKXPAT

    UKXPAT New Member

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    #48 UKXPAT, Apr 17, 2010
     
  8. ScottinBend

    ScottinBend Space Cowboy
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    #49 ScottinBend, Apr 18, 2010
    So I think I got mine working right......when would I see the boost go positive on the Scangauge....only WOT?

    I am also seeing a reading of -6.o at idle. I am at about 3500 ft elev.
     
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