Correct unit selection for measuring boost psi in FP

FlashPro Manager software
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steve47co1
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Correct unit selection for measuring boost psi in FP

Post by steve47co1 »

I am using FlashPro with the latest software and firmware and I have the Hondata 4 bar sensor installed. (I also have the CT-e SC Stage 2 kit installed with the 3.15" pulley and 1000cc injectors.) I make the 4 bar selection under sensors and indicate "psi" under measurement unit for MAP window.

When I am driving, I see psi ranging all the way up to 16-18 at WOT. This does not look right to me. I am tuning with Vit and he says I should be seeing 7-8 psi and the rest is vacuum?

Can anyone clarify this for me? Should I be using a different measurement unit in the selection menu for MAP?

Thank you.
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Hondata
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Re: Correct unit selection for measuring boost psi in FP

Post by Hondata »

Use "/psi for the unit rather than psi. Psi is absolute; "/psi is the bastard atmospheric relative unit that is popular here.
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steve47co1
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Re: Correct unit selection for measuring boost psi in FP

Post by steve47co1 »

Thanks, Hondata; tried that and I get negative numbers in the MAP window?
pepperdanky
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Re: Correct unit selection for measuring boost psi in FP

Post by pepperdanky »

Relative to atmospheric pressure, vacuum is negative.
steve47co1
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Re: Correct unit selection for measuring boost psi in FP

Post by steve47co1 »

Basic question, then; is it possible to see boost numbers accurately in FlashPro manager or do I have to interpolate?
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Hondata
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Re: Correct unit selection for measuring boost psi in FP

Post by Hondata »

The numbers are accurate; what unit and reference to you want?
If you select "/psi then vacuum is negative inches and boost is positive psi.
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steve47co1
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Re: Correct unit selection for measuring boost psi in FP

Post by steve47co1 »

Then I surmise I need to customize/add another window to the FP display to show psi, because MAP shows negative numbers now and there is no other window that would show psi? Am I on track?
steve47co1
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Re: Correct unit selection for measuring boost psi in FP

Post by steve47co1 »

Got it. As suggested, use "/psi and the MAP window in FP display will show vacuum numbers (-) until you increase throttle, then it will show atmospheric pressure (+) numbers.
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