Hyundai Beta engine

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The Hyundai Beta engine is a 1.6 L to 2.0 L straight-4 built in Ulsan, South Korea. All Beta engines are DOHC designs.

1 1.6
2 1.8
3 2.0
4 Beta II
5 References
6 See also

[edit] 1.6

The G4GR (also called the 1.6 D) is a 1.6 L (1599 cc) DOHC engine. Output is 114 hp (85 kW) at 6000 RPM and 106 ft.lbf (143 Nm) at 4900 RPM. The engine's bore is 77.4 mm and its stroke is 85 mm.

[edit] 1.8

The G4GM (also called the 1.8 D ) is a 1.8 L (1795 cc) DOHC engine with a larger 82 mm bore. Output is up to 130 hp (96 kW) at 6000 RPM and 126 foot pounds of torque (170 Nm) at 4200 RPM.

[edit] 2.0

The G4GF (also called the 2.0 D) is the 2.0L (1975cc) version. It shares the larger 82mm bore of the 1.8 but is stroked to 93.5 mm. It has a cast iron engine block and aluminum DOHC cylinder heads. It uses MFI fuel injection, has 4 valves per cylinder and features forged steel connecting rods. Output is 140 hp (104 kW) at 6000 rpm and 133 foot pounds of torque (180 N·m) at 4800 rpm.

The 2.0L Beta engine is renowned amongst Hyundai tuners for its potency and power potential when coupled with a turbocharger, in otherwise stock form.

With only the addition of a turbocharger the engine has been proven to withstand powers that exceed 300 bhp (220 kW) without any internal engine modifications,^{[citation needed]} even with its high 10.3:1 compression ratio, which tends to promote detonation on traditionally fuel injected engines.

With lower (8.5:1) compression ratio pistons (or simply a thicker headgasket) and the addition of a turbocharger, the engine will support upwards of 420 bhp (310 kW) before needing stronger connecting rods.^{[citation needed]}

[edit] Beta II

During 2001-2002, the new Beta II engine made its debut in models such as the XD Elantra and GK Tiburon. Output is 138 hp (102 kW) at 6000 RPM with 136 foot pounds of torque (184 N·m) at 4500 RPM. It has a cast iron engine block and aluminum DOHC cylinder heads. The latest version of the 2.0L Beta engine (G4GC) features CVVT, which only in intake side, a first for Hyundai/Kia. The following changes were noted.

Redesigned block with external contouring of cylinder bores (ilo flat sides), extra ribbing & one extra transaxle fixing point (now 5)(less NVH)
Crankshaft now has 8 counterweights ilo 4.(NVH)
Cast & ribbed aluminium sump pan (ilo pressed steel sheet) with stronger joint to transaxle (NVH)
Reshaped combustion chambers, ports & pistons (performance, [fuel] economy, emissions)
20mm longer intake rams, 8% smaller surge tank, resonator added, spark timing & valve lift optimized, lighter valve springs, denser conrod bearings, returnless fuel system (ilo return type) with higher fuel pressure & smaller injectors (torque spread & econ)
Cylinder head machined to more precise tolerances
Head gasket now 2-layer (ilo 3)
Idle speed reduced to 700 rpm from 800 rpm (NVH)
Hydraulic engine mounts (4) ilo rubber (NVH)
Heat shield installed between engine & air filter, reducing heating of induction air (+2% output).
New camcover with I-piece high-specific gravity polypropylene baffle (ilo 2-piece pp)
Oil flow reduced (econ)
Mechanical valve lash adjusters (solid lifters) replace hydraulic, improving valve clearance precision (durability).
Lower valve spring load reduces valve train friction (perf).
Engine cover installed (NVH & dress up engine bay)
Catalytic converter now upstream adjoining exhaust manifold (ilo under car) (emissions)
Other detail changes to: alternator, intake manifold brace, power steering & a/c pulleys, idle speed actuator, oil filler cap & drive plate between engine & torque converter[1]