K-Jet /PIC hybrid

[The Punisher]

So what you are saying is that they all use the same injector. That works 
into my plan perfectly.
I plan to use either a servo or stepper controlled valve.
I dont know the proper name of the type of valve I intend to make. Its a 
small diameter hardened shaft turned down in a section in the middle. A 
crossdrilled hole at one end of the chamber supplies pressurized fuel. A 
long slot running most of the length of the chamber provides fuel to the 
injectors. The movement of the valve inside the chamber uncovers more or 
less of the slot. This method seemed to work just fine on my old predator 
carbs and they used a hole not a slot. the idea of the slot is to make the 
flow rate more linear in relation to valve position.
also the main fuel pressure regulator could be adjusted electronicly.

This project could be done with a single PIC or AVR.

Ever since I first helped a friend with a 'Ron's Flying Toilet' injected 
drag car I have thought a constant flow/electronic hybrid would work. Last 
weeks trip to the pick-youre-part showed me that there is ALOT of K-Jetronic 
stuff sitting there that nobody seems interested in(understandable).Also I 
seen a web site that showed sandrails being fitted with K-jet's and the 
owners seemed real pleased(tune with screwdrivers instead of computer).
I have alot more planning/research to do. Thanks for the injector info.

The Punisher


>From: Bernd Felsche <bernie at innovative.iinet.net.au>
>Reply-To: diy_efi at diy-efi.org
>To: diy_efi at diy-efi.org
>Subject: Re: K-Jet /PIC hybrid
>Date: Mon, 23 Apr 2001 12:58:28 +0800 (WST)
>
>The Punisher tapped away at the keyboard with:
>
> > anybody know anything about the flow rates of K-jetronic injectors? The
> > VW/audi/volvo 4-5 cylinder systems, NOT the V8 versions.
> > Just doing a little thinking about a REAL simple 8-bit micro
> > controlled constant flow system with inexpensive oem parts
> > (K-jet's are plentifull at the wrecking yard).
> > And before I get replies about how bad they suck, I was only
> > thinking about the injectors and lines, not the wacky airflow
> > sensor. airflow sensing would be basic speed density/n-alpha combo
> > for realy wild cams.
> > Any k-jet injector info would help me determine if its workable.
>
>Each injector flows enough to produce in excess of 100bhp; dependent
>on fuel pressure and supply flow rate. vis Audi Quattro turbo,
>Porsche 944 Turbo.
>
>Golf GTI has about 200cc/minute/injector fuel flow at nominal
>battery voltage.
>
>How will you be regulating the fuel pressure and flow rate to the injector?
>
>--
>Bernd Felsche - Innovative Reckoning, Perth, Western Australia
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