Whats the difference between a Speed Density engine and a MAF engine?
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From: Oswego, IL
Car: 87 Pontiac Firebird Formula
Engine: 355 SBC-Thats all I can say or they will break my legs.
Transmission: 5 Speed
A speed density system calibrates your air fuel by MAP, TPS, IAT, and CTS. A MAF system calibrates it by measuring the amount of air coming into your engine and the temp of that air. THat is it in a nutshell.
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
There's really no difference between the engines. Just the induction control as stated above and the hardware needed to do it.
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speed density systems are aka MAP systems. they have sensors for air pressure and temperature to estimate the actual mass of air in the intake system so it knows how much fuel to spray for the ideal air/fuel ratio.
a MAF (mass airflow system) tries to measure the mass of air directly, and most use the temperature change of a heated wire in the MAF to estimate how much actual mass is in the intake system.
a MAF (mass airflow system) tries to measure the mass of air directly, and most use the temperature change of a heated wire in the MAF to estimate how much actual mass is in the intake system.
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From: E.B.F. TN
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Originally posted by five7kid
There's really no difference between the engines.
There's really no difference between the engines.
He's right.Anyway, for a nice little overview:
http://users.wpi.edu/~ktarry/dsmtech/airmetering.html
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