Technical Specifications

At Cartell Motors, Lda, we ensure that all our high-performance crate engines and transmissions meet or exceed rigid engineering standards. Below you will find the comprehensive technical blueprints, dimensional metrics, adjustment parameters, and fluid dynamics guidelines required for precise installation and long-term powertrain durability.

1. High-Performance Crate Engines (V8 Configurations)

Our crate engines (such as the Chevy 383 Stroker and Ford Coyote-style variants) are machined to precise tolerances to minimize friction, optimize thermal dissipation, and deliver continuous horsepower under severe street, track, or marine conditions.

Specification Metric
Engine Tolerance & Value Details
Block Material & Finish
Cast iron or performance aluminum alloys; multi-stage deck plate honed to +/- 0.0005" accuracy.
Crankshaft Balance
Digitally balanced internal or external configurations; rotational variance within 2 grams.
Compression Ratios
Ranges from 9.5:1 (for pump-gas and marine utility) up to 11.0:1+ (for high-octane performance setups).
Valve Seat Concentricity
Multi-angle radius cuts with less than 0.001" total runout for optimal high-RPM cylinder seal.
Ignition & Timing Setup
HEI distributor or coil-on-plug setups; base timing standard 10-12° BTDC, total timing 32-34° at 3,500 RPM.

2. Automatic & Manual Transmissions

Our remanufactured and upgraded gearboxes are built to sustain strict shift logic parameters and handle high-input torque thresholds.

Gearbox Parameters
Technical Allowances & Configurations
Torque Capacity Thresholds
Street/Towing setups rated up to 450 lb-ft; extreme performance units rated up to 750 lb-ft input torque.
Clutch Pack Air-Gaps
Precision clearance measured at 0.045" - 0.060" to maintain fast lockup without friction drag.
Electronic Architecture
12V CAN-bus integration modules; internal solenoid resistances calibrated to 10-15 ohms at 20°C.
Spline Interface Counts
Standard 27, 30, and heavy-duty 31-spline output arrangements dependent on target axle loads.

3. Fluid capacities & Thermal Threshold Layouts

Adhering to correct operational temperatures and fluid capacities prevents systemic component breakdown and retains structural warranty validity.

Powertrain Class
Recommended Lubricant Fluid
Optimal Operational Thermal Band
Automotive V8 Blocks
Premium 5W-30 or 10W-30 Full Synthetic (approx. 4.7 - 6.5 Liters)
82°C – 105°C (Coolant temp limits)
Marine Inboard Motors
High-Stability SAE 25W-40 Marine Certified Oil (approx. 5.5 Liters)
70°C – 85°C (Lower thermal limits for raw water scaling control)
Automatic Gearboxes
Dexron VI / Mercon LV High-Shear Fluid (approx. 9.5 - 12.0 Liters total fill)
75°C – 95°C (Max transient peak limit 110°C before fluid degradation occurs)
Manual Gearboxes
SAE 75W-90 Synthetic GL-4 or specialized syncchromesh fluid formulas
60°C – 90°C ambient running ranges

4. Quality Control & Dyno-Testing Validation

Every powertrain built or remanufactured under Cartell Motors, Lda must pass strict dynamic qualification processes before distribution:

• Cylinder Leak-Down Mapping: Verified across all combustion chambers; maximum threshold variance allowed is less than 4% drop per cylinder.
• Dynamic Line-Pressure Profiling: Automatic units are benchmarked on our electronic dyno test rigs across all forward gears to verify valve body response times.
• Ultrasonic Casting Inspections: All blocks and structural main cases pass density check loops to eliminate hidden internal micro-fractures.
• Static Priming: Prior to test runs, oil galleries are pre-pressurized to guarantee clean, unmarred initial crank operations.