4.3 multi-port fuel injection

Ryan Harrell cyborne at murlin.com
Sun Mar 31 18:49:37 GMT 1996


john spears wrote:
> 
> I've been observing the list for awhile, thought I'd through my $.02 in. The
> 4.3L CPI engine is a huge improvement over the TBI version. Although it only
> uses one injector, the CPI design allows you to deliver the fuel where it
> belongs and also allows for some nice manifold air tuning in the process;
> thins you just can't do when you're carrying an A/F mixture. I've done about
> three of these engines and have turned out well. What would be ideal is to
> find a damaged one in the junkyard and get the manifold assembly for your
> engine. I use the factory ECM on most of my projects as they are fairly
> cheap and have all the bases covered. A little EPROM programming to cover
> your specifics and you're on your way!
> 
>                John Spears
>        Speartech Fuel Injection Systems

As the original poster of this 4.3 discussion, I'd like to know if anybody 
has some information on Vortec's supercharger they are designing for the V6 
engine.  I called Fuel Injection Specialities, whose name I found in a 
magazine, for info.  They stated that Vortech would have a sequential 
central-port injection supercharger in a couple of months.

Also, FI Specialties priced the SCPI kit at $1895 and I was wondering if 
anybody knew of a cheaper price anywhere else.  I'd like to ask Mr. Spears 
how hard would it be to adapt a centrifugal supercharger not designed for 
SCPI to it.  The reason for this is because ATI Technologies makes an 
extremely powerful superchager that I'd like to use.  Also, I plan to 
racing heads, roller cam, bore out the engine, and just about any other idea 
I can find to produce more horsepower (my goal for this engine is around 
500-600HP on a $6000 budget) However, I know little about programming EPROMs, 
and have no idea on what equipment or software is required for reprogramming 
(although I am willing to learn). If you can recommend a book or other 
instrucion tool to help me I'd be appreciative.

Finally, is there any R&D going on for a true port injected 4.3L V6?

I GREATLY APPRECIATE all the help I've gotten from this mailing-list



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