Pulse Width at -40 degrees

[Bruce Plecan]

Note a universal formula, depends on engine.  If you were to look thru the
hacs at www.tunercat.com there is lots of useful info  about air temp.,
coolant temps for the gm ecms.
Grumpy

| Other than the fact that the colder air is denser and drier how much
longer
| should the pulse width be extended relative to a pulse width at say
freezing
| temperatures?  5% 10% 100% 200%
|
| Is there anyone out there in a cold climate that can measure the pulse
width of
| a cold engine at -20 to -40 compared to what it is when the engine has
been
| parked in a garage at just above freezing?
|
| The problem is that where I live the Winter temperature is currently +2C
and
| still fairly humid in this temperate rain forest.  An engine we have
installed
| out where it's -20C has a heck of a time starting unless they warm up the
engine
| compartment with a space heater.  I realize this is a problem that people
in
| California do not have.  Same with people who only race in the summer.
Anyone
| done and DIY_EFI for an ice racer?
|
| Thanks,
|
| John
|
|
|
|