[Diy_efi] GMC 747 and Ford duraspark

[Bill USN-1]

Peter,
My first suggestion would be a search of the tech articles on the jeep
sites.
Your conversion has been done numerous times by others. I think you
could get something real close and some good pointers.

I currently use the 7747 setup on my international V8 motors.
I converted the distr to the duraspark pickup to run the EFI following
the TFI upgrade which I'm sure your familiar with.
The wiring diagrams for the DS are listed in the stickys at the top of
the post at www.justinternationals.org
Just go to the FI forum.
I would also suggest the www.thirdgen.org site for a lot of general
tech.

You definitely want the timing control!!!

HTH


Bill
USN-1


-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
On Behalf Of Peter Jonasson
Sent: Monday, July 05, 2004 1:29 PM
To: 'A list for Do-It-Yourself EFI'
Subject: [Diy_efi] GMC 747 and Ford duraspark

Hello

I am putting together my own TBI kit for my 87 Jeep yj, using an 88
AstroVan
as a donor vehicle. This will put a 4.3L 1227747 TBI system onto a Jeep
4.2L
ex-carb breather.

Initially I will only be using the MAP, TPS, CTS, O2 and speed sensors
for
feedback. Currently I am designing an adapter plate (TBI to intake),
hopefully one piece.

Now to my questions... 
(all are assuming installation on a 87 Jeep 4.2L (258 cu. in))

Does anyone have a bin, or recommend a bin from the diy-efi archives I
can
load as a starting point for tuning?

I want to, at some point, control ignition timing with the 747. Can you
hook-up the stock Duraspark ignition system to the GM 747? 

If the Duraspark is a no-go, can you recommend a GMC HEI system that
both
fits the 4.2L and works with a 747? I know the 77 to 84 GMC 250 HEI will
work, stand alone (gear change required), but can it be modified to work
with the 747?

Does anyone have experience using the GM EGR electric solenoid in
controlling the valve?

What is the Park/neutral switched used for in a 747? My Jeep is
standard.

What is an EAC solenoid?

Lots of questions, but at some point I hope to make it all work.

I am currently running a Weber carb with a Duraspark HEI system, both
are
upgrades from stock. I want to go TBI to improve emissions and
driveability.

Thanks for all the help.

Regards... Peter 
"There are 3 types of Engineers..."
"Those that can count... and those that can't"

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