[Diy_efi] batch or not to batch...

[ScottyGrover at aol.com]

In a message dated 7/17/2006 8:08:58 A.M. Pacific Daylight Time,  
rfrey at iupui.edu writes:

For  maximum efficiency and lowest pollution, sequential firing is a
plus.   Otherwise, batch fire is just fine.  Sequential injection  allows
slightly, very slightly, better idle, efficiency, and emissions at  low
rpms.  At any kind of power requirement, your injector duty cycle  will
be 80 - 90% which means they're open nearly all of the time, so  batch
firing is about the same as sequential at that point.   Individual
injectors per cylinder is a must, but batch firing is, although  not the
best, just fine.

My opinion,

rick  frey



A better idea is to size your injectors for max. power at no more than 80%  
duty cycle. Numerous books and magazine articles have this information.   
You'll need this (but definitely) if you're going to use a turbo--that's what  
Buick did.
Scotty