Corvair Efi

[peter paul fenske]

Hi Martin

Well had a chance to think about this.

First the mechanical side. You will have to fab a long runner
manifold for your flat six with the runners into a plenum.
This is necessary to use a GM throttle body with TPS and IAC.
Also you will need to mount injectors and aim at the proper angle
at the intake valve where the manifold mounts to the head. Then
you will have to fabricate fuel rails to feed and hold injectors
in place. Also you will have to mount bypass regulator. 
You will need: a 280z or jetta frame mounted fuel pump, mount
a return line to your gas tank filler, a knock sensor new type
with carbon pellet, not old hi z type, and aldl connector. Also
will have to deal with VATS. We might do this in code. Not sure
yet. I hope you are a good fabricator Martin.

Now as to ecm. Tec, DFI, and Accel would make life easy for you.
Much more user friendly than GM. Although I've seen the electronics
and GMs much better. Can't go wrong with a few billions for R&D.
Also much cheaper. And neater?

Now plan B is to rob one of the GNs of their C3 along with 
the attendant electronics. These guys have a software package
called Chipster which takes care of a lot of your problems 
Martin. Also a lot of the GN lookup is readily available. 
Albeit the component price is a bit high. A 87 GN motor
with all is about 2500$ here in Vancouver. The electronics might
be ok. I believe the same ECM is used in other 3.8 buicks. The MAF
may be hard to come by cheaply. But you do get sequential and
wastegate control.

Now to the 1227730 GM ecm. I don't absolutely know all the code.
If you get additional help this can probably be accomplished.
There are two ways to do this. One is to let the ECM do all
the fueling for non boost operation. Then we merely have to
fudge the VE maps with the Wot corrector to get the right
A-F ratio. Then if you add a fuel rail pressure modifier(fmd)
you should have it licked. If you use 5.7 injectors and limit
boost to 8 PSI. Mind you we still have vats and no
egr to contend with. Solveable but tacky. Also have to watch
the Map sensor to avoid an error code. A boost check valve 
should do it.

The more difficult way is to get the 730 to do everything. I
do not have the resources to do this. In a year maybe. There is
at least 20K of code. You would have to add a two bar Map.
This entails rewriting the Map routines of which I am yet 
unsure of. Also some code must be added. If the runtime is
tight we may have to remove some code. Don't need egr or tcc
I trust. I believe a lot of people much more competent than
me have been working on this for a long time. Maybe they will
help you in your endeavor Martin.

As to my projects have done a few gm tpi to gm conversions.
Pretty safe as long as you install everything. Now have to
do a LT1 to 4 runner Yikes this thing wants to talk to 8 
other computers and it gets hornery if missing friends. Also built
a few proto fuel controllers. Non I would install in a car.
I am working on one that I would install in a car. Borrowing
a lot from the General on this one.

Well tnx everyone for Help: peter