Twin injector system?

[Roger Heflin]

It hits me that having dual injectors would be the way to go, but you
would need to rework alot of stuff to make everything work correctly,
ie the computer.  

There is at least one person on the f-body list (camaro/firebird) who
is running something called the Carroll superfueler, it is apparently
a TBI add on with three injectors that goes behind the TB and adds 
additional fuel when it is needed.  I do not know how much computer
control it has with it, or if it has any at all, but that seems
to be the buyable implementation that at least one person is using.
Iguess it kind of works like the NO2 type fuel injections systems, and
realisticly you may not need much control with it, just dump in
enough fuel that you are able to properly adjust things the rest of
the way way with the injectors that are currently in the vehicle.

I am also not that sure that the idle gets that bad if the computer
understands how big the injectors are.  My care is running injectors
in the 34 lb range (given the fuel pressure I am running, compared
to where the injectors were rated), and idles and starts just fine.
				
			Roger


> 
> Low RPM/daily driving tends to be a bit rough with large injectors in a
> hi-hp engine, and then upper RPM lean out-out performance driving gets
> to be a problem. My idea was to try and get the injectors to take up
> some of the slack of a radical cam on a daily driven street engine, such
> as I use mine, and then have everything you need when it's time to mash
> it. My engine is supercharged (via Carroll Supercharging/Paxton SN-89
> blower). Just searching for the best of both worlds, and electronics is
> the only way to get there from here. Problem is, I am a mechanic not an
> EE... :) or should that be an :(
> I've got lots of feasable ideas, just no way to impliment them on my
> own.
> Other places such as Mallet, AMG, Lingenfelter ect. all use pretty much
> standard mechanics to try to acheive the best of both worlds, but with
> the polution laws they are tied down. With my way, the
> pollution/performance problem is nill, and performance is greatly
> enhanced. Also, gas mileage would be maximized for both types of driving
> and not reduced to the normal gas-hog status.  It it were not for trying
> to find a way to do something better, this list would not exist, and we
> would still be driving Model T's....<smiles>
> Also on my wish list is a variable length plenum/runner design,
> electronically controlled of course. maybe I should go back to school
> for my EE degree? <smiles>
> Critique, ideas and suggestions are always cheerfully accepted! Thanks.
> 
> diy_efi at efi332.eng.ohio-state.edu wrote:
> > 
> > -----Original Message-----
> > From: Daniel Ciobota <dciobota at hiwaay.net>
> > Subject: Re: Twin injector system?
> > 
> > >Barrett Flowers wrote:
> > 
> > >> My idea is a fairly simple one, the smaller injector is only used at
> > >> idle and part throttle, as rpm's increase the second injector takes
> > >> over
> > >> from the first, and at WOT both injectors kick in.
> > 
> > Not as simple as you might think, for getting the hand off points right,
> > 
> > Lots easier IMHO  just to add.....
> > 
> > >> Would someone be willing to build a system like this so I can test it
> > >> on
> > >> my supercharged 600HP Corvette?
> > >>  <snip+clip>
> > >>      -Barrett
> > 
> > Just a point to consider, the GN boys run 50#/hr injecttors on a 231
> > v-6 no problem.  On a 8 lets see 8*50=400,    400/.5=800 HP
> > Other than just being trick, why all the extra work?.
> > 40's and a raising rate fuel magement regulator, and that would seem
> > good to me.  Course I'm not signing the checks.
> > Course I'm really stuck at KISS
> > Cheers
> > Bruce
>