I was thinking of buying a new perfomance mass air sensor, what are some pros and cons about them?
New MAF sensor
I was thinking of buying a new perfomance mass air sensor, what are some pros and cons about them?
They really dont help at all. Most throw lean codes and cause problems later. Not worth it IMO.
RUN WAT U BRUNG!!!!
there isnt a thing called a performance MAF. A maf is a supporting sensor and when its time to upgrade its time to go SD. your stock 85mm is plenty
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it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
Ok, o... by the way, what is SD?Originally Posted by Quik
SD is Speed Density.
T-RAV99 GMC | 5.3 | Skinny White Guy Tuned
Can you give more info lol
OMG... lol, like what is speed density, does it have to do with higher air flow?
hahahahahaha... speed density is when the pcm uses only the volumetric efficiency table to adjust injector pulse width. The VE table is basically a table of numbers that represent the pumping effeciency of the engine. SD uses the IAT, and MAP sensors and engine rpm to reference what value of the VE table to use to adjust fueling. Stock our trucks use a combination of the MAF and the VE table. It uses the VE table at low rpm/low air flow and switches over to the MAF at higher rpm/airflow since the MAF doest get stable readings with low airflow. People run SD to be able to copletely do away with the MAF so they can route the intake without having to worry about it and several other reasons. Some will say SD is better and some say using the MAF is better. I dont really know. I like the MAF myself because it measures actual dynamic airflow and is not a "guesstimation" like the VE table. That is why when you make a change to the airflow to or from the engine (ex. headers, cam, heads, intake etc.) you need to retune the the ve and maf tables in the pcm to decrease/add fuel to compensate for the increased/decreased pumping effeciency/airflow of the engine. Thats just my .02 and understanding of the subject. I might have missed a few things or be wrong on a thing or two but anyone is welcome to correct me
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Thank you, so where would I get an SD... cause my MAF is messing up.hahahahahaha... speed density is when the pcm uses only the volumetric efficiency table to adjust injector pulse width. The VE table is basically a table of numbers that represent the pumping effeciency of the engine. SD uses the IAT, and MAP sensors and engine rpm to reference what value of the VE table to use to adjust fueling. Stock our trucks use a combination of the MAF and the VE table. It uses the VE table at low rpm/low air flow and switches over to the MAF at higher rpm/airflow since the MAF doest get stable readings with low airflow. People run SD to be able to copletely do away with the MAF so they can route the intake without having to worry about it and several other reasons. Some will say SD is better and some say using the MAF is better. I dont really know. I like the MAF myself because it measures actual dynamic airflow and is not a "guesstimation" like the VE table. That is why when you make a change to the airflow to or from the engine (ex. headers, cam, heads, intake etc.) you need to retune the the ve and maf tables in the pcm to decrease/add fuel to compensate for the increased/decreased pumping effeciency/airflow of the engine. Thats just my .02 and understanding of the subject. I might have missed a few things or be wrong on a thing or two but anyone is welcome to correct me
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