This is topic whats the difrence in forum Tech Talk at Northern California Ford Owners  .


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Posted by STANGBOY (Member # 7868) on :
 
between mass air and non mass air
 

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Posted by 96232 (Member # 9375) on :
 
mass air uses the manifold absolute pressure sensor to determine airflow based on manifold pressure for correct a/f ratio. Mass air uses the barometric pressusre sensor(looks similar to map sensor on speed density) to determine air density and a mass air meter to determine airflow for correct a/f ratio.
 

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Posted by STANGBOY (Member # 7868) on :
 
waaat lol to technical for me bro,so is there any difrence in power,y do people change to mass air

[ December 23, 2009, 07:23 PM: Message edited by: STANGBOY ]
 

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Posted by STANGBOY (Member # 7868) on :
 


[ December 23, 2009, 07:22 PM: Message edited by: STANGBOY ]
 

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Posted by 96232 (Member # 9375) on :
 
mass air responds better to cam changes than speed density. Its more tuneable and the speed density is a good system for a stock car, but if you are going to modify it then convet to mass air
 

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Posted by Adam5.0 (Member # 6995) on :
 
Fox's dont have a map sensor. airflow entering the engine is determined by the maf, tps, IAT and baro.

with speed density the car will not respond well to cam changes because the ecu is only expecting a certin amount of air entering the engine. your basically upgrading to a "smarter" ecu
 

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Posted by STANGBOY (Member # 7868) on :
 
will it be fine if i just put some headers,h=pipe,and mufflers
 

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Posted by STANGBOY (Member # 7868) on :
 
anybody
 

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Posted by 89bluenotch (Member # 7454) on :
 
yes you can run exhaust....even heads/intake. I think it will start running like crap with a aggressive cam, Keep the stock one
 

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Posted by phildog (Member # 1214) on :
 
The 'B' cam was designed to be compatible with SD. You can go fast with SD, but you reach a point after HCI and other bolt ons that you need the real-time air measurement of MAF. MAF systems measure the amount of air, SD systems calculate it by using other factors to tune the A/F curve to match.
 

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Posted by Big block 66 f100 (Member # 8867) on :
 

quote:

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Originally posted by Adam5.0:
Fox's dont have a map sensor. airflow entering the engine is determined by the maf, tps, IAT and baro.

with speed density the car will not respond well to cam changes because the ecu is only expecting a certin amount of air entering the engine. your basically upgrading to a "smarter" ecu

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