Terminator 3 bar map?
We noted recently that the LS9 sensor stops at approx 284kpa. P01 ECU, 3 bar tune.
My buddy was running 25 psi, along with the scramble button couple weeks ago at LS Fest In Vegas. I am the tuner, but not there. He was sending me logs. Turned out he was looking at the kpa in the data logs and not seeing it move so he upped the scramble dome pressure.
Boost hit 32 psi. Oops. Truck was bad *** fast though!
I never knew this was an issue with this sensor. No wonder Holley calls it a 2.5 bar map.
My buddy was running 25 psi, along with the scramble button couple weeks ago at LS Fest In Vegas. I am the tuner, but not there. He was sending me logs. Turned out he was looking at the kpa in the data logs and not seeing it move so he upped the scramble dome pressure.
Boost hit 32 psi. Oops. Truck was bad *** fast though!
I never knew this was an issue with this sensor. No wonder Holley calls it a 2.5 bar map.
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From: Seattle
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I made my own 3 bar map sensor by replacing the guts in a factory 1 bar sensor. Used a Freescale Map sensor IC. If you get the correct data, you can calculate offset and linear. I just need to remember how. If they give enough data with their sensor.
Could also be calibrated manually. But that’s real clunky.
I didn’t see where it said not for HPTuners?
Could also be calibrated manually. But that’s real clunky.
I didn’t see where it said not for HPTuners?
Last edited by RonSSNova; May 10, 2022 at 06:06 PM.
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Verdad Gallardo TECH Fanatic
Joined: Jan 2022
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From: Seattle
Scroll to the bottom of this link, it's the last sentence
"Not compatible with FAST XFI or HP tuners."
"Not compatible with FAST XFI or HP tuners."
Scroll to the bottom of this link, it's the last sentence
"Not compatible with FAST XFI or HP tuners."
"Not compatible with FAST XFI or HP tuners."
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Joined: Nov 2014
Posts: 1,308
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I've been using this type of GM 3 bar map sensor for over 20 years, They work!
Original GM 3 Bar
In addition, I like to get the map sensor a little bit away from the manifold to smooth manifold pulses and get a more accurate reading. The longer the vaccuum/boost line, the more smoothing.
Original GM 3 Bar
In addition, I like to get the map sensor a little bit away from the manifold to smooth manifold pulses and get a more accurate reading. The longer the vaccuum/boost line, the more smoothing.
An oldie but goodie. Would be interesting to measure one.
