wannabe calloway turbo kit?

[Jason Gray]

  I too am playing with the idea of converting my stock '87 4Kq into a "bolt
on" turbo engine. I can handle the fabrication of any of the piping needed
to install the 85 5000 turbo manifolds, K26, oil cooler etc that I have
collected. I just dont want to spend the considerable time and $ that it
would take to transplant the complete engine and fuel system from a 5000. I
seriously doubt that I have the skills and electrical system knowledge to do
the wiring harness/dashboard modifications needed to successfully adapt the
complete 5000 fuel system so staying with the 4000 parts appeals to me, even
if this ultimately limits me to 6-8psi.

I have studied the book BOSCH FUEL INJECTION & ENGINE MANAGEMENT by Charles
Probst extensively to hopefully learn enough about the stock 4K CIS KE fuel
system to pull off the turbo swap.  Th KE uses a pressure actuator (grey box
on front side of fuel distributor unit) to allow the electronic "brain" to
precisely modify the delivery of fuel from the basic mechanical CIS fuel
curve. Typical "neutral" input signal for the pressure actuator is 10mA for
normal warm engine operation, and during cold startup input signal of up to
70mA is used to richen the mixture.  One idea I had was to try modifying
input signal to the pressure actuator in response to boost to provide
richened air/fuel mixture. Perhaps use a hobbs pressure switch to intercept
the input signal from the electronic control module (in response to boost
pressure)  and instead supply a constant, stronger (70mA?) electronic signal
to the pressure actuator. This should at least richen the mixture up to the
point where you run out of capacity at the injector (analogous to 100% duty
cycle with pulsed EFI). Signal modification might even provide capacity for
adequate fueling at a higher boost pressure or RPM? Perhaps a adjustable
rheostat could be put inline with the intercepted Hobbs switch signal to
allow adjsutability of the boost richening?

 Perhaps a cruder method of fueling modification would be to attempt to
change the geometry of the sensor air funnel cone. My making the cone
"steeper" toward the top, the sensor plate metering lever would be depressed
further by a given amount of airflow yet fuel delivery curve could remain
unchanged at lower airflow (cruising and non-boosted  airflow range).
Altering the cone shape could only deliver the max amount of fuel sooner, no
provision for supplying additional fuel to support higher boost pressure or
RPM .

Anyone have any suggestions for modifications to the CIS-KE system?

What sort of intercooler installation has worked well on 4KQT converted
cars? I am looking at removing the A/C condensor and installing an
intercooler in this location just ahead of the radiator. Any suggested
alternate IC placement?  I have heard that the 5000 IC is not particularly
desirable, anyone have suggestions for a better Volvo, SAAB or Ford IC that
could be adapted?

Thanks-
Jason K  Gray
Wasilla Alaska
'87 4Kq
'71 2-door 510 w/ L20B, DCOEx2
'73 2-door 510, L20B, garret T3, SUx1
510 website http://home.att.net/~jason510/

Those are not oil stains in the driveway, they are bluebird droppings.