[Diy_efi] sequential injection timing

[Mark Claywell]

> 
> 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
thr=
> u
> the GNTtype archives you can read up what happens when you try to fire
th=
> e
> injector at an open intake valve.

Talk to someone who is running a racing engine and not a street engine.
Guaranteed the are running on a partial or all open valve. Especially an
engine  that is geared more towards racing. Almost all japanese 4 banger
engines will benefit from open valve injection timing. Once again, not
saying all engines will benefit, as it is often quite engine and setup
specific. 



> 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.
sheerin=
> g
> the fuel into vapor. most likely the best way to do this is to create a
9=
> 0=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
f=
> uel
> into vapor. the optimum placemnt for the injector would be right before
t=
> he
> short side radious in the intake port. and the timing would have it
squir=
> t
> right as the valve began to open. thats my 2cents.
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi
> 
> 
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi
> 



_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi