2 or 3 bar map sensor
2 or 3 bar map sensor I guess i never ever thought about this....do i need to buy a new map sensor for my car when it is turboed...I have FFI live to tune with but do i still need a new sensor?
Unless you have the EFILive OS that's setup for a multibar sensor, all you'll be doing is creating headaches for yourself.
We've been running without a boost reference for years. MAF sensors are good like that
Now if you're going to a SD tune or custom OS, etc then yes you need the sensor.
We've been running without a boost reference for years. MAF sensors are good like that
Now if you're going to a SD tune or custom OS, etc then yes you need the sensor.
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i was gonna say what Harlan said....i was under the impression the stock map sensor was a 2 bar and was good til 1 bar of boost....on my aeroforce scan gauge it says that it should only read boost if the car came factory equipped with a turbo....well when i set it on manifold pressure it read boost so i dont see what the problem is unless you want to run more boost than that.
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can someone fill me in on this. i have a 408 ebing built for a procharger and want to go with an sd tune. from what i heard i will be maxing out my maf. so what do i need to get here?
im told i should be at 700+ rwhp / dont know about the torque with afr 225's
cam is 24x/25x .6xx/.6xx 115
im told i should be at 700+ rwhp / dont know about the torque with afr 225's
cam is 24x/25x .6xx/.6xx 115
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Joined: Nov 2003
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From: Norn Iron
Some sensors may have a little lee-way on those numbers.
Ive heard the factory Honda sensor will still read up to 9psi positive pressure
Early Subarus for example only read about 0-214Kpa.
Does your ecu actually recognise everything in the range 100kpa-200kpa ???
Strictly speaking the voltage output will simply flatline once beyond its range.
Some people just tune around it for their maximum boost. SO it would matter if the engine had 1.2 bar or 1.9 bar, the fuel/ign settings would be the same, which is far from ideal, but still functional.
The pcm doesnt actually know the difference.
Same way when the MAF flow limit is exceeded. Some people just tune around it.
Ive heard the factory Honda sensor will still read up to 9psi positive pressure
Early Subarus for example only read about 0-214Kpa.
Does your ecu actually recognise everything in the range 100kpa-200kpa ???
Strictly speaking the voltage output will simply flatline once beyond its range.
Some people just tune around it for their maximum boost. SO it would matter if the engine had 1.2 bar or 1.9 bar, the fuel/ign settings would be the same, which is far from ideal, but still functional.
The pcm doesnt actually know the difference.
Same way when the MAF flow limit is exceeded. Some people just tune around it.
Originally Posted by ddnspider
my stock ECU is reading boost
WOT is a no no til i go tune next friday.i was just saying that if the stock ECU isnt supposed to be able to read boost,then why is my scan gauge which connects directly to the OBD2 port reading positive pressure when i go up to 2psi,which is the most boost i wanna go to until i get my full tune.Ive got a very safe base tune so i know it'd be ok but why chance it.doesnt make sense to me.im going to take the car out tomorrow with a friend and have him note the different values its giving for each sensor
Originally Posted by ddnspider
WOT is a no no til i go tune next friday.i was just saying that if the stock ECU isnt supposed to be able to read boost,then why is my scan gauge which connects directly to the OBD2 port reading positive pressure when i go up to 2psi,which is the most boost i wanna go to until i get my full tune.Ive got a very safe base tune so i know it'd be ok but why chance it.doesnt make sense to me.im going to take the car out tomorrow with a friend and have him note the different values its giving for each sensor
When you say your scan gauge sees 2psi...what is the actual output? Meaning, does it say "2 psi" on the screen?
yes it actually said 2psi on the screen...unfortunately i dont have any tuning software handy other than the scan gauge...go to http://www.aeroforcetech.com/GMtech.html and i can tell you any of those parameters.i got it to watch for knock but its got other little handy parameters.
