I'm confused about MAF, IAT, Barometric and MAP sensors + breakout cables...
06-28-2017, 12:06 PM
#1
I'm confused about MAF, IAT, Barometric and MAP sensors + breakout cables...
I thought I had it all sorted in my head with regards to getting my S/C'd, Meth injection Stringray ready for tuning.
I was going to relocate my IAT sensor into the intake manifold by cutting a couple of the wires from the MAF.
Then I was going to simply replace the stock MAP sensor (i'm assuming its the one thats on the drivers side of the intake manifold) with an LS7 one, make the required changes in HP Tuners and be done.
But then I see the pre-wired relocation harnesses that talk about relocating both the IAT and the barometric sensor, and now I'm confused.
Is the barometric sensor not the MAP sensor, and if not, why does it need to be relocated and is it a big deal if it isn't?
I was going to relocate my IAT sensor into the intake manifold by cutting a couple of the wires from the MAF.
Then I was going to simply replace the stock MAP sensor (i'm assuming its the one thats on the drivers side of the intake manifold) with an LS7 one, make the required changes in HP Tuners and be done.
But then I see the pre-wired relocation harnesses that talk about relocating both the IAT and the barometric sensor, and now I'm confused.
Is the barometric sensor not the MAP sensor, and if not, why does it need to be relocated and is it a big deal if it isn't?
06-28-2017, 07:56 PM
#2
Le Mans Master
Sounds like you want to relocate the IAT sensor to be post-blower, which makes sense.
On the MAP, though, wouldn't an LS7 MAP sensor be a single-bar sensor though? If you're adding a supercharger, you need a 2 bar map.
On the MAP, though, wouldn't an LS7 MAP sensor be a single-bar sensor though? If you're adding a supercharger, you need a 2 bar map.
06-28-2017, 08:38 PM
#3
I'm Batman..
Pro Mechanic
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 6,130
Received 908 Likes
on
561 Posts
Tech Contributor
I thought I had it all sorted in my head with regards to getting my S/C'd, Meth injection Stringray ready for tuning.
I was going to relocate my IAT sensor into the intake manifold by cutting a couple of the wires from the MAF.
Then I was going to simply replace the stock MAP sensor (i'm assuming its the one thats on the drivers side of the intake manifold) with an LS7 one, make the required changes in HP Tuners and be done.
But then I see the pre-wired relocation harnesses that talk about relocating both the IAT and the barometric sensor, and now I'm confused.
Is the barometric sensor not the MAP sensor, and if not, why does it need to be relocated and is it a big deal if it isn't?
I was going to relocate my IAT sensor into the intake manifold by cutting a couple of the wires from the MAF.
Then I was going to simply replace the stock MAP sensor (i'm assuming its the one thats on the drivers side of the intake manifold) with an LS7 one, make the required changes in HP Tuners and be done.
But then I see the pre-wired relocation harnesses that talk about relocating both the IAT and the barometric sensor, and now I'm confused.
Is the barometric sensor not the MAP sensor, and if not, why does it need to be relocated and is it a big deal if it isn't?
Ant
06-28-2017, 10:36 PM
#4
Race Director
Member Since: Jul 2007
Location: Texas Hill Country
Posts: 10,763
Received 2,379 Likes
on
1,238 Posts
I recommend you break out the Baro so it doesn't read boost/wrong Baro while boosted air is going by the MAF.
Putting the Baro in open air allows it to not be affected by charge air and allows the ECM to properly calculate Pressure Ratio, which it needs for volumetric efficiency.
I think it's more important to break the Baro sensor out than the IAT sensor.
Putting the Baro in open air allows it to not be affected by charge air and allows the ECM to properly calculate Pressure Ratio, which it needs for volumetric efficiency.
I think it's more important to break the Baro sensor out than the IAT sensor.
07-19-2017, 12:39 PM
#5
Supporting Vendor
I recommend you break out the Baro so it doesn't read boost/wrong Baro while boosted air is going by the MAF.
Putting the Baro in open air allows it to not be affected by charge air and allows the ECM to properly calculate Pressure Ratio, which it needs for volumetric efficiency.
I think it's more important to break the Baro sensor out than the IAT sensor.
Putting the Baro in open air allows it to not be affected by charge air and allows the ECM to properly calculate Pressure Ratio, which it needs for volumetric efficiency.
I think it's more important to break the Baro sensor out than the IAT sensor.
Steven Fereday
__________________
Worlds Quickest C8 Corvette 8.83@160MPH
FIRST C7 Corvette in the 7's & 9's
FIRST C7 Corvette in the 7's & 9's
2019 ZR1 LT5 8.874 @ 155
Current C7 World Record Holder 7.55 @ 184 MPH
Quickest and Fastest GEN5 LT Powered Vehicle
LMR1200HP Supercharged C7 8.84 @ 160
LMR1200HP Twin Turbo C7 9.35@155mph-2014
2 TIME OUTLAW DRAG RADIAL LSX CHAMPION 2008/2010
9.47 ZR1 Corvette-2009
LATE MODEL RACECRAFT
713-466-9900
LateModelRacecraft.com
Too many PMs, please call or email instead, thanks!
Current C7 World Record Holder 7.55 @ 184 MPH
Quickest and Fastest GEN5 LT Powered Vehicle
LMR1200HP Supercharged C7 8.84 @ 160
LMR1200HP Twin Turbo C7 9.35@155mph-2014
2 TIME OUTLAW DRAG RADIAL LSX CHAMPION 2008/2010
9.47 ZR1 Corvette-2009
LATE MODEL RACECRAFT
713-466-9900
LateModelRacecraft.com
Too many PMs, please call or email instead, thanks!
07-19-2017, 12:45 PM
#6
02-18-2018, 05:42 PM
#12
Drifting
