MAP Sensor Reading Peaks Out - Not Matching Mechanical Gauge
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From: Hiboosta, IL, USA
MAP Sensor Reading Peaks Out - Not Matching Mechanical Gauge
On my first turbo setup I ran a damaged (compressor blade) T3 Super 60 with the VAFC Hack. I had a manual boost controller but I could never raise the boost higher than ~.65 kg/cm^2.
I have since replaced my turbo with a T3/T04e, new manifold, some new charge pipes, and switched the map sensor out for the JDM one that came with one of my swaps. Now I'm running a .7 bar spring. The VAFCs peak pressure value still only goes to .65. Even with an electronic boost controller hooked up I can watch my mechanical gauge go high into the 12-13PSI range and the VAFCs peak value doesn't change.
All of my vacuum lines are tight and have zip ties on them. This wouldn't bother me but it's making my tuning less acurate because I have to use the 8.0PSI colum for adjustments I'm making that are really taking place at 10PSI. Any ideas of what could be going on?
CLIFF NOTES: VAFC wont read over .65kg/cm^2, replaced turbo, manifold, wastegate, vacuum lines, and map sensor. Still is showing .65kg/cm^2 when running > 10 psi.
I have since replaced my turbo with a T3/T04e, new manifold, some new charge pipes, and switched the map sensor out for the JDM one that came with one of my swaps. Now I'm running a .7 bar spring. The VAFCs peak pressure value still only goes to .65. Even with an electronic boost controller hooked up I can watch my mechanical gauge go high into the 12-13PSI range and the VAFCs peak value doesn't change.
All of my vacuum lines are tight and have zip ties on them. This wouldn't bother me but it's making my tuning less acurate because I have to use the 8.0PSI colum for adjustments I'm making that are really taking place at 10PSI. Any ideas of what could be going on?
CLIFF NOTES: VAFC wont read over .65kg/cm^2, replaced turbo, manifold, wastegate, vacuum lines, and map sensor. Still is showing .65kg/cm^2 when running > 10 psi.
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From: Hiboosta, IL, USA
Re: MAP Sensor Reading Peaks Out - Not Matching Mechanical Gauge (blundar)
Really!?! I thought the stock map would scale through 10.5psi for obd-0 and .1bar more for obd-1.
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From: Hiboosta, IL, USA
Re: MAP Sensor Reading Peaks Out - Not Matching Mechanical Gauge (underpressure02)
I have a Apexi Electronic Peak/hold gauge and a Faze Mechanical. The VAFC is the only thing not reading correctly.
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From: Dothan, AL
Re: MAP Sensor Reading Peaks Out - Not Matching Mechanical Gauge (underpressure02)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by underpressure02 »</TD></TR><TR><TD CLASS="quote">What boost guage are you using? I know my autometer one is like 2-3 psi off. It reads 2-3 psi higher. </TD></TR></TABLE>
My greddy is also..
My greddy is also..
Joined: Aug 2002
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From: Hillburn, NY, USA
Re: MAP Sensor Reading Peaks Out - Not Matching Mechanical Gauge (beta13)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beta13 »</TD></TR><TR><TD CLASS="quote">Really!?! I thought the stock map would scale through 10.5psi for obd-0 and .1bar more for obd-1.</TD></TR></TABLE>
OBD0 is generally 9.6 psi give or take...OBD1 is slightly higher. All MAP sensors are not equal and will vary.
For example...max raw voltage I can log on mine is roughly ~4.3 volts, which is less than 9.6 psi.
OBD0 is generally 9.6 psi give or take...OBD1 is slightly higher. All MAP sensors are not equal and will vary.
For example...max raw voltage I can log on mine is roughly ~4.3 volts, which is less than 9.6 psi.
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