[Diy_efi] Mopar Small Block EFI Project

don.broadus at exeloncorp.com don.broadus
Tue Sep 5 13:46:26 UTC 2006


Looks Great !  Keep up the good work.

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Clair Davis
Sent: Sunday, September 03, 2006 12:19 PM
To: diy_efi
Subject: [Diy_efi] Mopar Small Block EFI Project


For a brief recap on the project, I'll include some links to photos I've
collected over the last couple of years.  No formal web page yet, I've only
gotten as far as uploading the photos.  Goal is to have a fun daily driver
with old-school style and modern reliability and handling.  She'll also see
a few autocrosses every year.

Here's the car, a 1969 Plymouth Valiant 2-door post sedan:
http://users2.ev1.net/~clairdavis/webimages/69sedan/In_The_Park2-PS-Clipped.JPG

Engine is a low-compression 340ci/5.6L V-8 from the early 70's, freshened up
by me in the late 90's.  In carbureted form, it makes 260 hp and 290 lb-ft
of torque at the rear wheels.  Runs just fine on 89 octane, and might
tolerate 87, but I haven't tried.
http://users2.ev1.net/~clairdavis/webimages/340/72tweaked340-Chassis-640.jpg

The nuts and bolts are that I've got a '730 ECM & wiring harness, a pile of
GM sensors, a pile of Mopar sensors, and a pile of Mopar hard parts, and
I've been working to make those three piles in to one coherent package.

Mopar Performance makes, or made, an EFI-ready single plane intake for the
Magnum V-8 trucks to replace the restrictive beer-barrel intake manifold,
using all the OEM Magnum fuel goodies - rails, injectors, sensors, throttle
body, etc.  This is the intake I have:
http://users2.ev1.net/~clairdavis/webimages/69sedan/upgrades/efi/M1_Magnum_Intake-01.JPG

Distributor is a no-advance unit from a late-1980's "Lean Burn" carbureted
small block:
http://users2.ev1.net/~clairdavis/webimages/69sedan/upgrades/efi/Reluctor_Pickup-01.JPG

Throttle body is also a Mopar Performance piece, 1000cfm 4V, billet
aluminum, all the Magnum sensors (TPS, MAP, IAC).
http://users2.ev1.net/~clairdavis/webimages/69sedan/upgrades/efi/Throttle%20Body.JPG

I still have to wire up the coil & mount the 8-pin HEI ignition control
unit, but that's about it for wiring.  That's also where I've got a couple
remaining questions, but I'll get to those later.  I'm really looking
forward to getting the old girl back on the road, and then seeing how far I
can tune the EFI to improve the package.

Clair
Fort Worth, TX

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