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Author
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Topic: whats the difrence
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STANGBOY
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Member # 7868
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posted
 
 
between mass air and non mass air
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1986 mustang notchback
she's good from far but far from good
Posts: 2510 | From: SAN JOSE | Registered: Aug 2007
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96232
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Member # 9375
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posted
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.
Posts: 118 | From: Pine Grove | Registered: Aug 2009
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STANGBOY
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Member # 7868
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waaat lol ![[Confused]](confused.gif) 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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1986 mustang notchback
she's good from far but far from good
Posts: 2510 | From: SAN JOSE | Registered: Aug 2007
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STANGBOY
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Member # 7868
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posted
[ December 23, 2009, 07:22 PM: Message edited by: STANGBOY ]
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1986 mustang notchback
she's good from far but far from good
Posts: 2510 | From: SAN JOSE | Registered: Aug 2007
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96232
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Member # 9375
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posted
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
Posts: 118 | From: Pine Grove | Registered: Aug 2009
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Adam5.0
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Member # 6995
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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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want something old and japanese
Posts: 1609 | From: Brentwood | Registered: Aug 2006
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STANGBOY
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Member # 7868
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posted
will it be fine if i just put some headers,h=pipe,and mufflers
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1986 mustang notchback
she's good from far but far from good
Posts: 2510 | From: SAN JOSE | Registered: Aug 2007
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STANGBOY
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Member # 7868
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posted
anybody
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1986 mustang notchback
she's good from far but far from good
Posts: 2510 | From: SAN JOSE | Registered: Aug 2007
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89bluenotch
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Member # 7454
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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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-Gunnar
89 coupe
54 f100
R.I.P. SILVERLX
Posts: 1857 | From: HEALDSBURG | Registered: Feb 2007
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phildog
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Member # 1214
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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.
Posts: 1554 | From: 510 | Registered: Apr 2002
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94 fobra
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Member # 8867
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quote:
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
hummm thats funny!then what would YOU call that little black sensor on the firewall that has a hose that goes to the intake.
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Im done with this ford vs chevy fight with "cafords" members. Aka big block 66 f100 but she's no longer:(
Posts: 2996 | From: Stockton | Registered: Jan 2009
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1965FALCOON
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Member # 8773
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EARLY FOXES WERE SPEED DENSITY BUT LATER WERE MASS AIR IF SPEED DENSITY SUCK SO MUCH WHY ARE ALL THE REALLY FAST AFTERMARKET FI COMPUTERS ALMOST ALL SPEED DENSITY
Posts: 91 | From: SANTA ROSA | Registered: Nov 2008
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