[Shotimes] MAF vs. Speed Density

[Ron Porter]

It's one of those "it depends". The GT 5.0 had a speed-density setup until
the '89 model, and as I understand, the speed-density setup had enough
flexibility to actually work better with the typical bolt-on mods than the
later MAF. Granted, with a lot of mods, the MAF is more flexible and can be
reprogrammed more easily. OTOH, there are chips for cars with speed-density
systems (like for the Fiero GT I have) that work well for the specific mods
that they are engineered for.

Since GMs 4.2 motor is the new motor, and I'm sure that speed-density has
gotten better over the years, they probably got better performance & mileage
with the more specific programming for conditions.

Ron Porter 

-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Alan Fanning
Sent: Wednesday, June 04, 2003 1:10 AM
To: SHOtimes
Subject: Re: [Shotimes] MAF vs. 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
>

>From what I've read regarding Ford 5.0 engines, the mass air flow design
will work with a fairly wide range of mod's, whereas the mass density meters
don't have that flexibility. For a given factory setup I think maybe it
doesn't matter. Wish I could remember more of the story...

    Alan