LostCRX

I'm looking for way to convert stock MAP voltage to PSI, i searched and found several but they were not accurate.

Mag00n

http://www.supramania.com/conversions.html

rioninja

I copied this a few months ago. Unfortunatly, i cant remember
which thread it was, or who originaly posted it. At a glance it
looks fairly acurate, although i have not double checked it.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UNKNOWN &raquo;</TD></TR><TR><TD CLASS="quote">
Voltage mbar

0.12 76
0.32 199
0.52 322
0.72 445
0.92 568
1.12 691
1.32 814
1.52 937
1.72 1060
1.92 1183
2.12 1306
2.32 1429
2.52 1552
2.72 1675
2.92 1798
3.12 1921
3.32 2044
3.52 2167
3.72 2290
3.92 2413
4.12 2536
4.32 2659
4.52 2782
4.72 2905
4.92 3028


OEM Honda map

0.4 100
0.67 200
0.94 300
1.22 400
1.50 500
1.77 600
2.05 700
2.32 800
2.60 900
2.87 1000
3.15 1100
3.42 1200
3.69 1300
3.97 1400
4.25 1500
4.52 1600
4.80 1700
</TD></TR></TABLE>

LostCRX

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SICKSOLVTEC-T &raquo;</TD></TR><TR><TD CLASS="quote">http://www.supramania.com/conversions.html</TD></TR></TABLE>
I don't think that would help much.

dennis

probably floating around on pgmfi.org. Could also use a vacuum/pressure pump and a volltmeter.

LostCRX

The reason I ask is this:

This is the datalog from my Zeitronix, the bottom number is the number from the "user define" which has a range of 0 to 5v, I hooked it up to my Map sensor in attempt to log boost. According to the above list and if the number is right, I would be running around 6.5psi at the this point of the datalog, but I wasn't running that at all, I don't think I even got out of vacuum yet since I barely went into WOT. The green number is AFR, the blue is RPM, the yellow is EGT, the purple is TP percentage and lastly is user's input. I"m thinking it's not displying voltage but somethign else.

shadow103rd

when you give it gas, does the blue numbers move at all in relation to how much throttle is given? does it come back down when the throttle is released???

Jon

rioninja

I've already posted all the info you should need to properly calibrate the datalogging program.

Most of the programs ive used are able to interpolate between a few set values.
The stock map is fairly linear, so just feeding in a few values is all you need.

for example:

2.87v is 1000mbar, which is "0" psi
4.25v is 1500mbar, which is 7 psi
4.80v is 1700mbar, which is 10 psi

LostCRX

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rioninja &raquo;</TD></TR><TR><TD CLASS="quote">I've already posted all the info you should need to properly calibrate the datalogging program.

Most of the programs ive used are able to interpolate between a few set values.
The stock map is fairly linear, so just feeding in a few values is all you need.

for example:

2.87v is 1000mbar, which is "0" psi
4.25v is 1500mbar, which is 7 psi
4.80v is 1700mbar, which is 10 psi
</TD></TR></TABLE>
Maybe that's where the confusion is from. I thought mbar was milibar, so wouldn't 1000mb equal to 1bar which is 14.xx psi?

USDM 4G VTEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LostCRX &raquo;</TD></TR><TR><TD CLASS="quote">I'm looking for way to convert stock MAP voltage to PSI, i searched and found several but they were not accurate.</TD></TR></TABLE>

heres ur answer courtesy of PGMFI.com

READ THE ******* WIKI!!!! lol



heres the link
http://www.pgmfi.org/twiki/bin...ensor

rioninja

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LostCRX &raquo;</TD></TR><TR><TD CLASS="quote">
Maybe that's where the confusion is from. I thought mbar was milibar, so wouldn't 1000mb equal to 1bar which is 14.xx psi?</TD></TR></TABLE>
Yes thats true, but you have to figure in atmospheric pressure, which is 14.xx psi.