Fw: [Diy_efi] EFI bug

[Justin Albury]

if you have a close look at the spacing of th 18x and th 3x on the balancer 
you will see that they are not in the same place ...ie 120 apart.  this is how 
the dif module knows which cyl or in a v6 which pair of cylinders (being waste 
spark and all)
hope this helps

justin

Quoting Geoff Harrison <geoff_h at smartchat.net.au>:

> Hi all, I am also a new member. Still learning the techniques used in EFI.
> Please correct me if I am incorrect with the following suggestions.
> The V6 GM EFI used on Australian Commodores is US manufacture.
> The Ausie V6 is the US Buick 3800 or 231CID. Mine is a 91 model,
> and stayed the same till 96. It uses 2 interrupters mounted on the back
> of the harmonic balancer. One interrupter has 18 slots, the other has 3.
> 2 Hall sensors are mounted adjacent to each other. It has direct fire
> ignition, using 3 double sided coils.
> 
> This unit should work on a 4 Cyl if interrupters can be made, using
> 12 and 2 slots, discarding the 3rd coil.
> What I haven't figured out yet, is how the EFI controller knows which
> stroke a given cylinder is on. There has to be a mechanism to determine
> which coil gets the spark. The post 96 models have a cam position
> pickup, and uses sequential firing of the injectors. The earlier unit used
> a MAP sensor, the later a hot wire airflow sensor.
> 
> You could use oil temp in lieu of the usual coolant temp sensor.
> Your idea of the V6 throttle body on a VeeDub. It wont be undersized!
> You could probably set up the idle valve as a cruise control.
> 
> As for the Ford IL6. Our Ford sixes of the early 90s came with MPI.
> This was a 4 litre with alloy head, OHC. I don't know if its the same as
> US 6s. But the injection system was good.
> I too have been thinking of IL6 with EFI. Rather than turbo, I like the
> idea
> of 6 TBs with ram tubes.
> 
> Cheers for now
> 
> ----- Original Message ----- 
> From: "Michael Kaczmar" <abbynrml94 at yahoo.com>
> To: <diy_efi at diy-efi.org>
> Sent: Tuesday, January 04, 2005 3:26 PM
> Subject: [Diy_efi] EFI bug
> 
> 
> > Hello:
> > I am a new member to this list, and have been lurking for a short time
> > now. I am interested in two DIY-EFI projects, and am looking for a
> > little info. As a brief resume, previous EFI projects include, Ford
> > EEC-IV Mass Air 5.0L Engine into my 53 F-100, converting a 93 GM LT1
> > harness over to the 94-95 8051 controller in my buddies Porsche 944,
> > and some LT1 tuning via TunerCat, as well as other late model GM stuff.
> > So, I do not consider myself a pro, but probably a little over a
> > novice. I am a Mechanical Engineer struggling to get these circuit
> > boards to tell my engine what to do. I have no problem with wiring, and
> > have access to a chip burner.
> >
> > My first DIY-EFI project is to setup EFI on an Air cooled VW bug motor.
> > I was planning on using a version of the GM-TPI controller. I have
> > experience with newer and late model GM-EFI systems, and TBI, but not
> > too much on the older speed-density controllers. I have been doing some
> > research, and is seems the "730" controller is what everybody refers
> > to. Other research indicates that the early 90's V6's used this same
> > basic controller? Finally, it also seems that the software has a
> > constant for # of cylinders. I plan on using GM sensors, and a GM
> > throttle body. A batch fire system should be fine, and once I have this
> > running, I will be adding a turbo, and 2/3-bar MAP sensor. Since I
> > understand GM EFI better, I'd like to use a GM controller if possible.
> > I have considered the Megasquirt, but I trust OEM-spec controllers over
> > aftermarket stuff. Call me crazy if you will.
> >
> > The questions I have are:
> > 1) Ignition. Can I run a coil pack setup, or do I modify a VW
> > distributor to work?
> > 2) What other sensors do I need to run a distributorless ignition? Is
> > it just a crank sensor,  a cam sensor or both? Just trying to figure
> > out how the controller determines which bank of injectors/what
> > cylinders to fire? This is where I am not clear.
> >
> > Plumbing high pressure fuel lines and fab work is not a problem for me,
> > it's getting the basics working on the EFI-side.
> > I'd like to figure out how to setup the firing order, and what needs to
> > be done to make this controller work on a flat-4 engine.
> >
> > I think this is enough typing for now, if I am off the deep end let me
> > know. In the long run, I would like to also do a turbo EFI Ford L6.
> >
> > Thanks folks..
> >
> > =====
> > Michael Kaczmar
> > Creator 77/94/95/96 Caprice a.k.a. Frankenstein LT1/MN6
> > 2004 Impulse Blue GTO, LS1/M12
> > 53 F-100 5.0/T5, Mustang II, T-bird IRS.....
> > 70 F-100 302/C4, Edelbrock, MSD, 1-off bodywork ;-)
> > 65 F-100 289
> > see http://www.geocities.com/abbynrml94 for project pics!!
> >
> >
> >
> > __________________________________
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> >
> >
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