[Shotimes] MAF vs. Speed Density

[Kevin & Cheryl Airth]

Don:
 I am surprised that a new motor would have a speed density system on it?

The speed density is cheaper and simpler. Uses less sensors. It usually is a
stop gap setup used after carburetors and before a full on MAF system. Most
aftermarket EFI setups use speed density.

The MAF is a much more precise engine management system. Almost all vehicles
were forced to a MAF system to meet the fuel economy standards as well as
emissions and drivability.

Maybe GM found an advantage going back to the speed density?
.
.

> What are the advantages again of using a MAF vs. Speed Density, if any?
>
> My 2003 Trailblazer XL has a nice motor I wish could show up in a car,
DOHC
> 4.2l Inline 6 with VVT, coated pistons, etc., and uses Speed Density.
>
> Don McKinnon
> 95 MTX