[Diy_efi] sequential injection timing

[Marteney, Steve]

I thought the LS1 V8 did exactly that, fire at an open intake valve?  I
remember seeing drawings (by GM) of the injector spray pattern just =
going
past the space between valve and valve seat and them touting "injector
targetting" as being key.

Just my bad memory perhaps,
Steve

-----Original Message-----
From: Bruce [mailto:nacelp at bright.net]
Sent: Sunday, July 30, 1995 11:01 AM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] sequential injection timing



Ever look at the injector pattern, at short pulse widths in slow =
motion?.
An intake valve is closed 3/4 of the time.   So like I said earlier, =
the
trick is getting the backflow of exhaust to atomize the fuel.
I have yet to hear of an oem firing the injector in what we'd call a
conventional engine at any time other then valve closed.  If you read =
thru
the GNTtype archives you can read up what happens when you try to fire =
the
injector at an open intake valve.
Bruce


----- Original Message -----
From: <Djfreggens at aol.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, July 30, 2002 10:29 AM
Subject: Re: [Diy_efi] sequential injection timing


im not a EFI guru but the obeject is the same as in a carberator. =
sheering
the fuel into vapor. most likely the best way to do this is to create a =
90=B0
angle to airflow. keeping the injector close to the vavle is crucial =
for
good
dry flow chareteristics but its not nearly as importnat as sheering the =
fuel
into vapor. the optimum placemnt for the injector would be right before =
the
short side radious in the intake port. and the timing would have it =
squirt
right as the valve began to open. thats my 2cents.

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