GSC R3 Camshafts – 5.0L Coyote Gen 3 (2018–2023 Mustang 5.0)
Max-effort race cams for ported-head Gen-3 Coyote. Built for high rpm and methanol-capable combos. Spring upgrade required. DI/HPFP lobe retained. Fuel: Methanol
The GSC R3 is a max-effort, high-RPM profile for ported heads and methanol builds. It’s engineered to carry power where the Coyote lives on the limit, with lobe design modeled against ported Gen 3 cylinder head behavior and rocker geometry. Each set is cut from our U.S.-made forged billet blanks and finished with BLACK ISE for reduced friction and long life. DI note: the high-pressure fuel pump (DI/HPFP) lobe is kept to OEM spec for proper pump operation.
Fuel
Methanol
RPM (Active VCT)
6,500–10,000 (≈9,500 peak)
RPM (Locked VCT)
6,700–8,900 (≈8,400) or 7,800–10,000 (≈9,500)
Valve Springs
Upgrade required (GSC springs + Ti retainers)
Use Case
Extreme Race · high-RPM
Head Type
Ported heads
DI Pump Lobe
OEM geometry retained (HPFP compatible)
Highlights
- Profile intent: Max-effort, high-RPM for ported heads and methanol fuel combos
- Valve springs: Upgrade required (use GSC-matched springs; Ti retainers recommended)
- VCT options: Supports Active VCT or Locked phasers (see timing reference below)
- Manufacturing: MADE IN THE USA; forged from proprietary U.S.-sourced bearing-grade steel, BLACK ISE surface treatment, CNC to tighter-than-OEM tolerances
- Fitment: 2018–2023 Mustang GT 5.0L
Tuning & Install Notes
- Fuel: Methanol. Gasoline/Ethanol blended fuels wont reach peak powers with this profile.
- Clearance: Always verify piston-to-valve with your exact heads/pistons/gasket stack. With OEM pistons & deck heights, the full phaser range is typically usable without clearance issues.
- Use upgraded valve springs (and Ti retainers) set to the tuner’s rev limit; check installed height and coil bind.
- Active VCT requires a calibrated phasing window; locked setups require a lockout kit and fixed timing calibration.
- See install sheet for torque sequence and procedures; prime oiling and fuel (HPFP follower inspection) on reassembly.
Camshaft Specifications – GSC R3 (Gen 3 Coyote)
| Cam | Advertised Duration | Duration @ .050" | Centerline (CL) | Max Lift | Cam Timing @ Peak Power (Active & Locked) |
|---|---|---|---|---|---|
| Intake | 300° | 246° | 120° | .560" | Active VCT: 118.5° ATDC Locked (≈8,400 peak): 112° ATDC Locked (≈9,500 peak): 118.5° ATDC |
| Exhaust | 316° | 252° | 138° | .560" | Active VCT: 118° BTDC Locked (≈8,400 peak): 115° BTDC Locked (≈9,500 peak): 118° BTDC |
