can you trick a map sensor?
12-02-2004, 07:54 AM
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can you trick a map sensor?
i know you can get a missing link or check valves, but can you just take the map sensor out and let it stay there? technically it would read 0 vac so i dont think it would throw a code...
12-02-2004, 07:58 AM
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It would throw a code, because technically then the map sensor would not think your car was running. At idle your car sits at 15-20 vac, and transitions to 0 at wot, then if you have a turbo, when the turbo starts to spool, you will start to read boost. But having your map unplugged will do nothing but harm your engine. It would be best to get a system that will utilize your map sensor, not (trick) it.
12-02-2004, 08:06 AM
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Re: (mattssi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattssi »</TD></TR><TR><TD CLASS="quote">It would throw a code, because technically then the map sensor would not think your car was running. At idle your car sits at 15-20 vac, and transitions to 0 at wot, then if you have a turbo, when the turbo starts to spool, you will start to read boost. But having your map unplugged will do nothing but harm your engine. It would be best to get a system that will utilize your map sensor, not (trick) it. </TD></TR></TABLE>
so a 3 bar?
so a 3 bar?
12-02-2004, 08:11 AM
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Re: can you trick a map sensor? (Btothe3rdDegree)
The MAP sensor is like... the #1 most important sensor in your motor. It and RPM are THE two things the ecu uses to fuel your motor... you can't just take it out...
Matt
Matt
12-02-2004, 08:40 AM
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Re: can you trick a map sensor? (Btothe3rdDegree)
yeah, how exactly does a 3 bar interact with a honda ecu? do they communicate enough to just use an FMU and a 3 bar and be all set? or does a 3 bar give off different voltages that the honda ECU's don't understand?
if they do work, what's the best 3 bar to get?
if they do work, what's the best 3 bar to get?
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12-02-2004, 08:43 AM
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Re: can you trick a map sensor? (Btothe3rdDegree)
12-02-2004, 08:55 AM
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Re: can you trick a map sensor? (Btothe3rdDegree)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Btothe3rdDegree »</TD></TR><TR><TD CLASS="quote">so is a 3 bar the only safe way to ad more boost? how much does a stock map sensor hold in psi?</TD></TR></TABLE>
From my knowledge a stock map sensor reads up to 11psi.but only if you areusing some kind of ecu such as hondata or aem,otherwise the computer goes limp.
If you have either of those ecu's get a 3bar,if not get both ecu and 3bar
From my knowledge a stock map sensor reads up to 11psi.but only if you areusing some kind of ecu such as hondata or aem,otherwise the computer goes limp.
If you have either of those ecu's get a 3bar,if not get both ecu and 3bar
12-02-2004, 12:06 PM
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Re: can you trick a map sensor? (86hatchfire)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 86hatchfire »</TD></TR><TR><TD CLASS="quote">so - if one is to run a 8psi wastegate and uberdata, a stock MAP will work great?
i'm sorry for stealing the post... </TD></TR></TABLE>
Yep.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Btothe3rdDegree »</TD></TR><TR><TD CLASS="quote">yeah i run uber</TD></TR></TABLE>
Good. You NEED to get a 3 bar mapsensor if you expect to go over 11 PSI. The stock ones are 1.75 Bar (1.75BAR = ~11PSI). I got a GM 3 bar map sensor for $65 shipped by calling up Motec. Someone told me to just call them so i got there number at there website and I ordered one.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 86hatchfire »</TD></TR><TR><TD CLASS="quote">yeah, how exactly does a 3 bar interact with a honda ecu? do they communicate enough to just use an FMU and a 3 bar and be all set? or does a 3 bar give off different voltages that the honda ECU's don't understand?
if they do work, what's the best 3 bar to get?</TD></TR></TABLE>
You have to run a full standalone system (AEM EMS) or hondata/Uberdata to use a 3 bar map sensor. No if/ands/ or buts on that one. This is because your entire fuel maps and ignition maps won't work if your ECU still thinks you run the stock one. Yes the voltage is different, but you also have to tell the ECU that the voltage means different things.
i'm sorry for stealing the post... </TD></TR></TABLE>
Yep.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Btothe3rdDegree »</TD></TR><TR><TD CLASS="quote">yeah i run uber</TD></TR></TABLE>
Good. You NEED to get a 3 bar mapsensor if you expect to go over 11 PSI. The stock ones are 1.75 Bar (1.75BAR = ~11PSI). I got a GM 3 bar map sensor for $65 shipped by calling up Motec. Someone told me to just call them so i got there number at there website and I ordered one.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 86hatchfire »</TD></TR><TR><TD CLASS="quote">yeah, how exactly does a 3 bar interact with a honda ecu? do they communicate enough to just use an FMU and a 3 bar and be all set? or does a 3 bar give off different voltages that the honda ECU's don't understand?
if they do work, what's the best 3 bar to get?</TD></TR></TABLE>
You have to run a full standalone system (AEM EMS) or hondata/Uberdata to use a 3 bar map sensor. No if/ands/ or buts on that one. This is because your entire fuel maps and ignition maps won't work if your ECU still thinks you run the stock one. Yes the voltage is different, but you also have to tell the ECU that the voltage means different things.
12-02-2004, 12:27 PM
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Re: can you trick a map sensor? (adseguy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adseguy »</TD></TR><TR><TD CLASS="quote">Good. You NEED to get a 3 bar mapsensor if you expect to go over 11 PSI. The stock ones are 1.75 Bar (1.75BAR = ~11PSI). </TD></TR></TABLE>
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.
I think somewhere you have to factor in the -14.7 psi of vacuum (which is actually measured in "HG instead of PSI) that a stock MAP measures too. Not quite sure but I know it comes into play.
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.
I think somewhere you have to factor in the -14.7 psi of vacuum (which is actually measured in "HG instead of PSI) that a stock MAP measures too. Not quite sure but I know it comes into play.
12-02-2004, 12:50 PM
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Re: can you trick a map sensor? (IslandSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IslandSi »</TD></TR><TR><TD CLASS="quote">
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.
</TD></TR></TABLE>
http://www.pgmfi.org/twiki/bin...ssure
education 0wns you.
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.
</TD></TR></TABLE>
http://www.pgmfi.org/twiki/bin...ssure
education 0wns you.
12-02-2004, 02:47 PM
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Re: can you trick a map sensor? (IslandSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IslandSi »</TD></TR><TR><TD CLASS="quote">
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.
</TD></TR></TABLE>
Just to make you feel even more silly 1 bar is 14.5 psi
14.7 psi is typical atmospheric pressure of 101.3Kpa
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.
</TD></TR></TABLE>
Just to make you feel even more silly 1 bar is 14.5 psi
14.7 psi is typical atmospheric pressure of 101.3Kpa
12-02-2004, 04:57 PM
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Re: can you trick a map sensor? (Btothe3rdDegree)
On my old set up, built d16z6, stock ecu, apex vafc & Itc, 600cc inj .I made 440whp 365 ft/lbs on a stock map sensor w/ 5 one way check valves, t3 60-1, 22 psi & 50 shot n2o (for spool up & to burn thru the fuel) .So i guess it just depends ghetto or not, you can fool a map sensor ! 
12-02-2004, 08:52 PM
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Re: can you trick a map sensor? (IslandSi)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IslandSi »</TD></TR><TR><TD CLASS="quote">
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.</TD></TR></TABLE>
Yeah I factored in the 14.5 PSI of pressure that is on top of our heads because of that whole damn gravity thing!
. So in other words you have 25.5-14.5 which about 11 PSI above atmospheric pressure to over in. Thank god honda put in a 1.75 BAR instead of just a 1BAR. I wonder why?
Uhmmm, no. 1 BAR is 14.7 psi. So a 1.75 is actually about 25.7 psi or so.
Don't know if you can use your stocker up that high. Just wanted to correct that.</TD></TR></TABLE>
Yeah I factored in the 14.5 PSI of pressure that is on top of our heads because of that whole damn gravity thing!
. So in other words you have 25.5-14.5 which about 11 PSI above atmospheric pressure to over in. Thank god honda put in a 1.75 BAR instead of just a 1BAR. I wonder why?
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