1993 Ford Mustang — Current Build Specs

Vehicle

Model/Year: 1993 Ford Mustang (Fox‑body)

Body/Trim: LX/GT (exact trim not specified)

Engine

Base Engine: 5.0 L Windsor small‑block (306 cid), stock short‑block assumed

Camshaft: Ford Racing X‑303 roller cam — 286° adv / 224° @0.050", 0.542" lift (w/1.6 rockers), 110° LSA

Forged internals with dss flat top pistons.

Throttle Body: 90 mm aftermarket unit

Intake: Cold‑air intake (fender‑mount style)

Fuel Injectors: 34 lb/hr from a friends coyote

Fuel Pressure Regulator: OEM (vac‑referenced) — base 39 psi (assumed)

Wideband O₂: AEM X‑Series 30‑0300; analog 0–5 V signal wired to DB37 pin 23 (EGO1)

Exhaust

Headers: Shorty headers (equal‑length, 1‑5/8")

Mid‑Pipe: High‑flow crossover (X‑pipe

Full 2.5" exhaust with Borla mufflers ( no cats)

Engine Management & Tuning Hardware

ECU: MegaSquirt PNP‑2 (MSPNP2‑EEC48A) — hardware v2.0, firmware 3.4.4

Tuning Software: TunerStudio MS Ultra

Strategy: Speed‑Density; closed‑loop EGO with VE‑Trim learning enabled

Current VE/Spark Tables: “hp_timing_plus1.msq” (34.5° total timing above 4 400 rpm)

Driveline

Transmission: Tremec RS‑7003J Magnum 6‑speed (retains mechanical speedo output)

Clutch/Flywheel: OEM specification (details not supplied)

Rear Gear: 3.73 8.8” axle

Auxiliary Systems

Idle Control: Ford PWM IAC; AC idle‑up adder active (+150 rpm)

Cooling: Aluminum radiator Moshimoto 

Ignition: Demon Coil 



WOT AFR: 12.5–12.8 : 1 (stable)

Peak Injector Duty: 92 % at 5 450 rpm, 100 kPa


Knock Retard: 0.0° logged at 34.5° total timing

Last major tune step: Added +1° timing in 4 400+ rpm / 90‑100 kPa band (2025‑06‑07).