MAF Sensor Comparison - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DeltaEcho · 04-29-2018, 06:31 PM

Hi there;

The idea is this; bare with me...
My build so far I am slowly building up my car for a turbo kit.
The idea is to go piece by piece so the day I acquire the kit. There shouldn't be issues the day the kit installed.

That being said; MAP sensor..

Perrin has a 2.5BAR and there are a few other companies that sell 3BAR and 4BAR.

For a DD turbo kit and building up to it. Is there a difference between the 2.5BAR or 3BAR MAP?
When should I get a 4BAR MAP?

Kodename47 · 04-29-2018, 07:49 PM

MAP not MAF. You only "need" as high as the max boost pressure you expect to see. Don't forget that 0 Bar boost is 1 Bar MAP. The smallest you need is preferable.

wbradley · 04-29-2018, 10:43 PM

2.5 bar is plenty for the boost these car take unless built motor.

coxxoc · 04-29-2018, 11:21 PM

Most MAP sensors are going to output a 0-5v signal. You will want the lowest pressure sensor possible to provide the most granular signal in that range based on the target boost you plan to run. If you don't plan on running 20+ lbs of boost, stick with a 2.5 bar (about 21 psi) sensor

Fred E · 04-30-2018, 09:17 AM

The Omni 3 bar MAP sensor is most commonly used and is good to about 29 psi of boost (have to account for atmospheric pressure), which is more than enough for a daily driver. A 4 bar sensor is therefore highly unnecessary. Whichever one you pick, just let your tuner know so they can enter the scaling value into the tuning table.

http://omnipowerusa.com/store/Subaru...nsor-c11282089

Hags86 · 05-01-2018, 06:36 PM

Agreed. I have the omni 4 bar and regret it. Error on a sensor is measured as a percentage of full scale reading so you end up with larger errors in the reading than you would on a 3 bar.

04-29-2018, 06:31 PM	#1
DeltaEcho Senior Member Join Date: Nov 2017 Drives: 17BRZ Limited TS Location: South NJ Posts: 123 Thanks: 7 Thanked 4 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	MAF Sensor Comparison Hi there; The idea is this; bare with me... My build so far I am slowly building up my car for a turbo kit. The idea is to go piece by piece so the day I acquire the kit. There shouldn't be issues the day the kit installed. That being said; MAP sensor.. Perrin has a 2.5BAR and there are a few other companies that sell 3BAR and 4BAR. For a DD turbo kit and building up to it. Is there a difference between the 2.5BAR or 3BAR MAP? When should I get a 4BAR MAP? Last edited by DeltaEcho; 04-29-2018 at 07:55 PM. Reason: spelling...

04-29-2018, 07:49 PM	#2
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,633 Times in 1,113 Posts Mentioned: 156 Post(s) Tagged: 1 Thread(s)	MAP not MAF. You only "need" as high as the max boost pressure you expect to see. Don't forget that 0 Bar boost is 1 Bar MAP. The smallest you need is preferable. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
P0140 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 2) Help	Johnders2586	Issues \| Warranty \| Recalls / TSB	9	04-04-2023 04:32 PM
is the front o2 sensor a wideband sensor?	mad_sb	Engine, Exhaust, Transmission	19	12-13-2015 03:20 PM
Greddy informeter, boost sensor, boost sensor harness, info touch sensor apaptor	Supra2k	Audio/Visual, Electronics, Infotainment, NAV	1	02-26-2014 09:11 PM
Stock FA20 Crankshaft Angle Sensor - Anyone know what type of sensor and output?	Acree	Engine, Exhaust, Transmission	2	08-26-2013 07:39 PM

04-29-2018, 11:21 PM	#4
coxxoc Member Join Date: Dec 2015 Drives: BRZ Location: Bentonville, AR Posts: 46 Thanks: 5 Thanked 15 Times in 11 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Most MAP sensors are going to output a 0-5v signal. You will want the lowest pressure sensor possible to provide the most granular signal in that range based on the target boost you plan to run. If you don't plan on running 20+ lbs of boost, stick with a 2.5 bar (about 21 psi) sensor

04-30-2018, 09:17 AM	#5
Fred E Senior Member Join Date: Dec 2013 Drives: WRB BRZ Location: New Jersey Posts: 261 Thanks: 83 Thanked 150 Times in 96 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The Omni 3 bar MAP sensor is most commonly used and is good to about 29 psi of boost (have to account for atmospheric pressure), which is more than enough for a daily driver. A 4 bar sensor is therefore highly unnecessary. Whichever one you pick, just let your tuner know so they can enter the scaling value into the tuning table. http://omnipowerusa.com/store/Subaru...nsor-c11282089

05-01-2018, 06:36 PM	#6
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Agreed. I have the omni 4 bar and regret it. Error on a sensor is measured as a percentage of full scale reading so you end up with larger errors in the reading than you would on a 3 bar.

User Name		Remember Me?
Password