General question

[adh at an.bradford.ma.us]

	From: pantera at dris.com (David Doddek)
	Subject: Re: General question
	
	                                              Firing on the open valve
	is a controversial subject.  Some research says that firing on the open
	valve does not give a good burn since the droplets from the injector are
	too large.  It is believed that injecting on the closed valve will allow
	some of the heat of the valve to be used to evaporating the fuel, (
	liquid gas does not burn, only the vapor. thus the catoletic converter.)
	It is also believed that the high velocety air present when opening the
	valve will create better atomization then the injector.  

in line with this, i've been thinking about preheating the gas in the
fuel rails so that it would vaporize better upon injection.  this
would work best with avgas, which has a narrow [and high] vapor range.

temperature control is one obvious requirement.  gasoline consistency
is another.

on balance, i don't really think it will work, because you would
constantly be on the bleeding edge of vapor lock...
_______________________________________________________________________________
Andrew Hay
	    LIFE, n: A phenomenon that resists the second law of thermodynamics
adh at an.bradford.ma.us						---Schroedinger