Sender: "Marvin Kaye" <marv@lancaironline.net>
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Date: Fri, 31 Dec 2004 14:00:03 -0500
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From: W Atkinson <Walter@advancedpilot.com>
Subject: Re: [LML] Re: RAM, SLAM, BAM - MAP, WHAP, ZAP - HUH?  


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Scott:

**That's interesting,=A0 3 psi is 6.1" Hg. - not possible for me no=20
matter how fast I go.=A0 The best I can hope for is 0 psi at WOT or by=20=

flying=A0with a greatly reduced throttle setting.=A0But, at least it is=20=

not=A0negative psi.=A0 Does this mean that turbo/super charged systems=20=

maintain=A0such a differential?=A0 If only I could use the 12-port=20
electronic injectors supplied with my motorcycle and, they don't need=20
no stink'nr to help with atomization.=A0=A0**

If there is no differential pressure, there is no atomization.  The=20
fuel comes out in a stream, not a fog.  Having a slight differential=20
pressure is very helpful.  I must not understand your setup.  Is it NA=20=

or TC'd?  If it is NA, then the upper deck pressure under the cowl is=20
higher than MP and that is the source of the differential pressure for=20=

the injector.  If it's TC'd, the upper deck pressure comes through the=20=

controller off of the turbo and is forced through the injector under a=20=

3psi differential (above current MP), otherwise, the fuel wouldn't go=20
into the port without a  very high fuel pressure.  I have some pics of=20=

this difference in fuel stream out of injectors if you'd like to see=20
them.

Walter

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Scott:


<fontfamily><param>Arial</param><smaller>**That's interesting,=A0 3 psi
is 6.1" Hg. - not possible for me no matter how fast I go.=A0 The best I
can hope for is 0 psi at WOT or by flying=A0with a greatly reduced
throttle setting.=A0But, at least it is not=A0negative psi.=A0 Does this
mean that turbo/super charged systems maintain=A0such a differential?=A0
If only I could use the 12-port electronic injectors supplied with my
motorcycle and, they don't need no stink'nr to help with
atomization.=A0=A0**


</smaller>If there is no differential pressure, there is no
atomization.  The fuel comes out in a stream, not a fog.  Having a
slight differential pressure is very helpful.  I must not understand
your setup.  Is it NA or TC'd?  If it is NA, then the upper deck
pressure under the cowl is higher than MP and that is the source of
the differential pressure for the injector.  If it's TC'd, the upper
deck pressure comes through the controller off of the turbo and is
forced through the injector under a 3psi differential (above current
MP), otherwise, the fuel wouldn't go into the port without a  very
high fuel pressure.  I have some pics of this difference in fuel
stream out of injectors if you'd like to see them.


Walter<smaller>

</smaller></fontfamily>=

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