7.3L IDI Diesel

International/Navistar 7.3L IDI Specs & Information

 

By increasing the bore of the 6.9L to 4.11 inches, the 7.3L IDI was created, replacing the 6.9L in 1988. The 7.3L IDI was naturally aspirated like its predeccesor until 1993, when a turbocharged version of the IDI was introduced. The turbocharged version of the 7.3L IDI was short-lived since it was replaced mid-1994 by the 7.3L Power Stroke (turbocharged, direct injection, computer controlled). Little did Ford know then that 7.3 would become a magic number in the diesel industry. The 7.3L IDI shares a similar reputation as that of the 6.9L, with the exception of the turbocharged version. Many argue that the 7.3L IDI was not designed with turbocharging in mind, and therefore was ill-equipped to handle forced induction. Even so, the 7.3L continued on the legacy that the 6.9L started in 1983.

 

7.3L IDI Specs

Manufacturer:

International

Production Years:

1988-1994

Applications:

Ford F250, F350

Configuration:

V-8

Block/Head Material:

Cast-iron/Cast-iron

Displacement:

444 cubic inches, 7.3 Liters

Compression:

21.5:1

Bore:

4.11 inches

Stroke:

4.18 inches

Injection:

indirect injection (IDI)

Aspiration:

Naturally aspirated, non-turbo (turbo version 1993-1994)

Weight:

920 lbs (approx)

Peak Horsepower:

185 HP @ 3,000 RPM (190 w/ turbo)

Peak Torque:

360 lb-ft. @ 1,400 RPM (388 w/ turbo)

Reputation:

Reliable, later became 7.3 Power Stroke

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ford 7.3L IDI Info

• Ford introduced the turbochared 7.3L IDI in 1993 to stay competitive with GM's turbocharged 6.5L & Dodge's turbocharged 5.9L Cummins diesel powerplants.

• The 7.3L IDI had very respectable performance for being a naturally aspirated diesel engine.

• Ford's 6.9L & 7.3L IDI diesels proved extremely reliable powerplants during their 12 years of production, setting high standards for future designs by all manufacturers.

• Though a stock 7.3L IDI seems lacking in performance, rumors exist of one enthusiast pumping 1,200 horsepower out of his IDI, using extensive modifications, proving the capability of these trucks.

• Aftermarket solutions have long existed that can transform a non-turbo IDI into a turbocharged, intercooled truck, boosting performance & fuel economy dramatically.

 

7.3L IDI vs. 7.3L Power Stroke Diesel

Though the 7.3L IDI and 7.3L DI Power Stroke share the same displacement, the engines are ultimately very different:

 

7.3L IDI

7.3L Power Stroke

Displacement:

444 ci, 7.3L

444 ci, 7.3L

Compression:

21.5:1

17.5:1

Aspiration:

Non-turbo, indirect injection, turbocharged version introduced in 1993.

Turbocharged, direct injection.

Injection:

Stanadyne rotary injection pump, indirect injection

HEUI injection system, high pressure oil pump, direct injection

Peak Horsepower:

185 hp @ 3,000 RPM
190 w/turbo

275 hp @2,800 RPM

Peak Torque:

360 lb-ft @ 1,400 RPM
388 w/turbo

525 lb-ft @ 1,600 RPM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Related Topics:

6.9L IDI Specs

6.2L GM Specs

Ford Diesel Timeline

6.5L GM Specs