Ford's turbocharged 2.3 Lima powered a whole family of 80s cult cars: the Mustang SVO, Thunderbird Turbo Coupe, Merkur XR4Ti, Cougar XR-7 and the early carbureted Mustang and Capri turbos. Boost Lab, Inc. rebuilds the Garrett TB0322 and TB0344 hardware across the line, the verified 465978 and 466586 families, with the correct Ford 9G438 cross references. One engine, five cult followings, one rebuild bench. Nationwide ship-in service.
The Lima turbo program ran a decade and the hardware evolved with it. Match your car to its Garrett.
The first turbo Mustangs ran a draw-through carbureted setup on early Garrett TB03 hardware, no intercooler, and famously fragile oiling. Surviving cores are rare and rough, but rebuildable, and originality on these first-year cars is worth preserving.
Port fuel injection transformed the 2.3 in 1983. These cars run the Garrett TB0322, the 465978 family: -0003 and -0005 under Ford E3ZE-9G438-AE and -AF for 1983, -0007 and -0009 under E3ZE-9G438-AG for 1984. Non-intercooled but strong, and the foundation of the whole platform.
The intercooled SVO is the collector king of the family. 1983-1984 development and early cars carry 465978-0004, -0010 (E4ZX-9G438-AA), -0006 (E4ZX-9G438-AB) and -0008 (E4ZE-9G438-AA); the 1985-1986 205 hp cars move to the TB0344, 466586-0003 under E5ZE-9G438-BB. SVO originality matters and we document these rebuilds.
The intercooled 1985-on Turbo Coupe and Cougar XR-7 run the TB0344 466586 family: -0002 under E5ZE-9G438-AB and -0004 under E5SE-9G438-AA. The 1987-1988 Turbo Coupe added an intercooler and IHI-era refinements to the program's strongest street package.
Ford's German-built Sierra-based Merkur ran the same 2.3 turbo formula, sharing the TB0344/466586 architecture with the Cougar and Turbo Coupe. XR4Ti support through Ford channels is long dead, which makes the shared 2.3 parts ecosystem this car's lifeline.
Every injected 2.3 turbo runs proven Garrett TB03-architecture journal-bearing hardware with deep parts support, and the cars share components across five nameplates. Whatever badge is on the fender, the bench process is the same, and 360-degree thrust upgrades are available for cars running more than stock boost.
The 2.3 turbo's reputation for eating center sections traces to period oil habits: conventional oil, long intervals, and hot shutdowns coked the feed line and center section until the bearings starved. The engines that got synthetic oil and an idle-down habit ran their turbos for hundreds of thousands of miles. When we rebuild yours, inspect or replace the oil feed line, it is cheap insurance, and give the car 30 seconds of idle after a hard pull.
Verified Garrett catalog numbers with Ford 9G438 engineering numbers from period application data. Search by any number.
| Turbo PN | Model | OEM PN | Application | Notes |
|---|---|---|---|---|
| 465978-0003 | Garrett TB0322 | Ford E3ZE-9G438-AE | 1983 Mustang Turbo GT, Thunderbird Turbo Coupe | First injected year |
| 465978-0005 | Garrett TB0322 | Ford E3ZE-9G438-AF | 1983-1984 Mustang, Thunderbird | Running revision |
| 465978-0007 / -0009 | Garrett TB0322 | Ford E3ZE-9G438-AG | 1984 Mustang, Thunderbird | Late TB0322 street units |
| 465978-0004 / -0010 | Garrett TB0322 | Ford E4ZX-9G438-AA | 1983-1984 Mustang SVO | Intercooled SVO spec |
| 465978-0006 | Garrett TB0322 | Ford E4ZX-9G438-AB | 1984 Mustang SVO | SVO revision |
| 465978-0008 | Garrett TB0322 | Ford E4ZE-9G438-AA | 1984 Mustang SVO | Late 1984 SVO |
| 465978-0001 | Garrett TB0322 | Verify by tag | 1985 Capri / Mustang 2.3 Turbo | Carryover street unit |
| 466586-0002 | Garrett TB0344 | Ford E5ZE-9G438-AB | 1985+ Thunderbird Turbo Coupe, Cougar XR-7, Merkur XR4Ti | The shared TB0344 street unit |
| 466586-0003 | Garrett TB0344 | Ford E5ZE-9G438-BB | 1985-1986 Mustang SVO 205 hp | Late SVO spec |
| 466586-0004 | Garrett TB0344 | Ford E5SE-9G438-AA | 1985+ Cougar, Mustang, Thunderbird | SE-prefix application |
| Tag-specific | Garrett TB03 (draw-through) | Verify by tag | 1979-1981 Mustang / Capri carbureted turbo | First-generation cars; rare cores |
| Tag-specific | IHI (1987-1988 refinements) | Verify by tag | 1987-1988 Thunderbird Turbo Coupe | Late program hardware; tag governs |
The Lima turbo failure patterns are well documented after 40 years. Here is what the bench confirms.
The defining 2.3 turbo failure. Conventional 1980s oil plus hot shutdowns baked the center section and choked the feed line until the bearings starved. Every rebuild gets passages cleaned to bare metal, and modern synthetic plus an idle-down habit prevents the repeat.
These are all 35-to-45-year-old turbos now, and shaft play, whine, and oil consumption are the standard arrival condition. Caught before wheel contact, the housings and wheels survive and the rebuild is routine.
SVOs and Turbo Coupes sit between shows, and storage hardens seals. Blue startup smoke that clears is the classic sign. A reseal with modern materials plus bearing inspection usually returns a better-than-new unit.
The 2.3 community discovered the boost screw in 1984 and never looked back. Overworked thrust bearings let the compressor wheel walk into the housing. We fit 360-degree thrust upgrades on cars running more than stock boost.
The 2.3's exhaust manifold and turbo flange crack with heat cycles, bleeding drive pressure and mimicking a lazy turbo. Check the manifold before condemning the cartridge; we will tell you honestly if your core tests healthy.
Cheap kits and no balancing: we open plenty of 2.3 turbos that were rebuilt by mail-order kit decades ago. Mismatched clearances and unbalanced assemblies whine and wear fast. Every assembly we build is balanced before it leaves.
Same architecture, different specs. The intercooled SVO runs its own 465978 and 466586 dash numbers; the Turbo Coupe, Cougar and XR4Ti share TB0344 street hardware. The Ford 9G438 number on your tag identifies exactly which unit you have.
Yes. The TB0322 and TB0344 are Garrett TB03-architecture units with deep rebuild support. Your original casting is the only scarce piece, and it is almost always serviceable.
Almost certainly. Whine plus idle smoke is the classic worn-bearing, tired-seal presentation, and if the wheels have not contacted the housings the rebuild is routine. Ship it in and we will confirm the core before any work begins.
Yes. SVO values reward originality, and we photograph collector rebuilds at every stage, preserve original external hardware, and balance to factory spec. Note the car in your submission.
Tell us your boost level and we will build accordingly: 360-degree thrust upgrade, appropriate clearances, and an honest conversation about the stock frame's limits for your power goal.
Start at repair.theboostlab.com, photograph the tag, drain the oil passages, cap the openings, and double-box. Ship to Boost Lab, Inc., 37833 Pineapple Ave, Unit A, Dade City, FL 33523.