MAF Sensors Placement

[Todd Knighton]

Mark Eidson wrote:
> 
> Todd, with the problems you have described does MAP work better for these
> applications?  me


Mark,
	Map does get rid of the back flow, turbulence, low speed resolution hot
wire type problems, but doesn't get rid of the intake manifold resonance
problem and certainly comes with its own share of problems.  It needs
barometric, temperature and acceleration compensation, and does not
correct for engine changes over the long term.  Small changes on the
engine also affect the map sensor system whereas the hot wire works fine
with camshaft, cylinder head, and exhaust changes improving the flow.
	I've personally had quite a few bad experiences and currently go to MAP
on all our high performance systems and have been very happy with it. 
If I were an OEM, I would probably think hard towards using MAF, but
they don't run 750hp through a 3.6l twin-turbo 911 either.

Todd Knighton
Protomotive Engineering