Boost level accuracy with torque pro?
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Senior User
Joined: Aug 2012
Posts: 223
Likes: 1
Boost level accuracy with torque pro?
Hey ya'll, if this has come up before in the many other TP discussions, I couldn't find it with the search function.
I know that a true boost gauge would be better, but I'm curious what kind of accuracy those of you that have both are seeing with torque pro.
According to TP the highest I get at all (when I'm on it pretty good) is about 8psi. I "think" that it feels like it's low powered when driving, but since I haven't driven this truck new, I could be imagining it in my head because I'm seeing low numbers on TP.
Just curious how accurate it really is before I start diving in to figuring out where my boost leaks and such are.
I know that a true boost gauge would be better, but I'm curious what kind of accuracy those of you that have both are seeing with torque pro.
According to TP the highest I get at all (when I'm on it pretty good) is about 8psi. I "think" that it feels like it's low powered when driving, but since I haven't driven this truck new, I could be imagining it in my head because I'm seeing low numbers on TP.
Just curious how accurate it really is before I start diving in to figuring out where my boost leaks and such are.
Lead Driver
Joined: Jun 2007
Posts: 7,760
Likes: 27
From: Hampton, Maryland.
Torque pro SHOULD be very accurate up until about 23-25PSI. It reads exactly what the PCM see's from the MAP sensor, so if you are seeing 8PSI, thats what the computer sees. Either way, you have a problem. Search "boost leak detector" and start there.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
If you have "-BARO" in the equation, that doesn't work - it subtracts 14.7 PSI from the MAP no matter what your altitude is. If you drive significantly higher than sea level, like in many parts of the West - the boost will appear to be dismal.
Here are the equations I use:
Long name:Barometer
Short name: BARO
PID: 221442
Max/Min: 15.0/10.0
Unit: PSI
Equation: ((A*256)+B)*0.03625
Header: C410F1
The Min/Max values above are for realistic altitudes, but those who traverse the Rockies may see lees than 10 PSI (over 10,000 feet). If you do, you can change the Max/Min to 15.0/9.0.
Boost
(AKA Manifold Gauge Pressure)
Short Name: Boost
PID: 221440
Units: PSI
Max/Min: 30.0/0.0 (stock) 40.0/0.0 (performance)
Equation: (((A*256)+B)*0.03625)-[221442]
"-[221442]" subtracts the Barometric sensor (located on the PCM on some trucks, external on others) reading from the MAP reading - and this gives you just the boost pressure above atmospheric pressure.
Here are the equations I use:
Long name:Barometer
Short name: BARO
PID: 221442
Max/Min: 15.0/10.0
Unit: PSI
Equation: ((A*256)+B)*0.03625
Header: C410F1
The Min/Max values above are for realistic altitudes, but those who traverse the Rockies may see lees than 10 PSI (over 10,000 feet). If you do, you can change the Max/Min to 15.0/9.0.
Boost
(AKA Manifold Gauge Pressure)
Short Name: Boost
PID: 221440
Units: PSI
Max/Min: 30.0/0.0 (stock) 40.0/0.0 (performance)
Equation: (((A*256)+B)*0.03625)-[221442]
"-[221442]" subtracts the Barometric sensor (located on the PCM on some trucks, external on others) reading from the MAP reading - and this gives you just the boost pressure above atmospheric pressure.
Thread Starter
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Senior User
Joined: Aug 2012
Posts: 223
Likes: 1
I was using the PID that was already loaded in Torque Pro for boost reading. It says its getting info from the ECU, so it's what I've been using. I'll have to see if I can look at the equation it's using. I'm not sure.
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