Project “CFI to EFI” — 1984 Mustang 5.0 LX Coupe

Recently purchased by Mikes Mustangs as a shop project car is a 1984 Mustang 5.0 LX Coupe (Notchback). This car was purchased from a second owner and will be converted from a CFI (Central Fuel Injection Primitive Ford Fuel Injection) to a late-model style multi-port fuel injection. Stay tuned as this project gets underway.

Episode I — Removal of the Sith

We started by removing the rusty single exhaust system that was the original stock system. One catalytic converter and one muffler with a dual tip exiting on the driver’s side of the car. We will trash the single hump crossmember and replace it with a later model double hump unit. Next we removed the original 7.5 rear axle housing and installed our tried-and-true 3.73 5-lug 28 spline from our original ’88 LX Mike’s Mustangs Race Car. This rear is now going into its fifth Mustang (actually fourth, not counting a 1983 Capri).

We have always preferred a 5-lug wheel configuration as it lends itself to more rim selections and is also a personal preference over the standard 4-lug setups. We have already removed the remainder of the existing drive train – engine and transmission as well as the CFI’s cheesy fuel system which consisted of an internal and externally mounted fuel pump. We also removed the prehistoric EEC computer and harness. The wiring harness and vacuum bundle was discarded and will be replaced with a late model mass air harness.

NEXT UP – ENGINE PREP, WIRING, AND FUEL LINES

Here’s a look at the parts that are currently being used in the assembly of Mike’s Mustangs Project CFI to EFI

SPEC SHEET

PROJECT CFI to EFI

ENGINE:

1989 ROLLER BLOCK
STOCK CRANK
STOCK RODS
TRW 2488 FORGED FLAT TOP PISTONS app. 9.5 : 1 COMPRESSION .030 OVERBORE FOR 306 c.i.
FORD RACING ALUMINUM GT-40 “Y” TURBO-SWIRL
CYLINDER HEADS RE-PORTED BY FRANKIE FORD – FEL-PRO 1262 INTAKE/1415 EXHAUST PORT CONFIGURATIONS
EDELBROCK PERFORMER RPM EFI INTAKE MANIFOLD
MELLING M68 STANDARD VOLUME OIL PUMP
TRICK FLOW STAGE I HYDRAULIC ROLLER CAMSHAFT
FORD RACING DOUBLE ROLLER TIMING CHAIN
FORD RACING ROLLER ROCKER ARMS 1.72 RATIO
ARP ROD BOLTS
ARP HEAD BOLT KIT w/ STEPPED WASHERS
MAC 1 5/8 SHORTY HEADERS
FORD RACING 24lb INJECTORS
PRO-MASS AIR SYSTEMS 75MM MASS AIR
DRIVETRAIN: FREDDIE BROWN STREET /STRIP AOD
PRO-TORQUE 11” STREET STRIP CONVERTER
FORD RACING ALUMINUM DRIVESHAFT
AUTO SPECIALTIES UNDERDRIVE PULLEYS
DOWNS FORD 190LPH FUEL PUMP