Viking 175 Information

Type: 2L, Port Injected, Inline 4-cylinder

Horsepower: 175 @ 6800 RPM (2900 prop)

Torque: 321 ftlb @ 1,800 prop rpm

Weight: 250 lbs.

Gearbox Ratio: 2.33/1

Compression Ratio: 10.8/1

Bore and Stroke: 86.0 mm / 85.9 mm

Block Material: Aluminum

Takeoff RPM: Engine 5800 / Prop 2500

Cruise RPM: Engine 5400 / Prop 2300

Static RPM – STOL Competition: Engine 6800 / Prop 2900

Static RPM – Cross Country: Engine 4800 / Prop 2100

Idle RPM: 1400-1600 RPM

Coolant Temperatures: 200 – 220 F

Oil Temperature: Not Measured

Oil Pressure: 20 – 125 Psi

Fuel Pressure: 43 Psi from Header tank to the engine.

Fuel: 89+ Octane or higher grade - 100LL (MUST use Decalin and is not the preferred fuel)

Length: 27 in.

Height: 25 in.

Width: 24 in.

Gearbox Oil: 12 ounces 75W-90 Mobile 1 Synthetic Gear Oil.

Gearbox Temperature: Should not exceed 240 Fahrenheit.

Engine Oil: 0W-20

Coolant: Evans NPG Plus

Coolant System Pressure: 0 Psi

Maintenance:

Engine Oil Change: Every 50 hours (4 quarts)

Gearbox Oil Change: Every hour for the first 10 hours, then every 25 hours

The Viking 175 is popular with Rans and Zenith Pilots and Builders

ENGINE DETAILS

The Viking 175 engine is a 4-cylinder engine that can produce 175 horsepower at 6800 RPM. It is found in the Honda Civic Si and HRV models. The engine features an aluminum block and cylinder head with DOHC design. It has a compression ratio of 10.8:1 and a redline of 6,800 RPM. The engine is known for its high-revving capabilities and performance, as well as its fuel efficiency and reliability.

It is part of Honda’s K-series engine family. The engine features an aluminum block and cylinder head, DOHC (Double Overhead Camshaft) design, and VTEC (Variable Valve Timing and Lift Electronic Control) system, which help to improve its performance and efficiency.

Engine Origins:

• The Viking 175 engine draws inspiration from the Honda Civic Si and HRV models.

• It features an aluminum block and cylinder head with a DOHC (Double Overhead Camshaft) design.

• With a compression ratio of 10.8:1 and a redline of 6800 RPM, it’s a high-revving powerhouse.

1. Key Features:

   • VTEC (Variable Valve Timing and Lift Electronic Control): This system optimizes engine breathing at different RPM ranges, enhancing performance and efficiency.

   • 4 Valves Per Cylinder: Efficient air intake and exhaust contribute to improved engine performance.

   • Advanced Technologies: The Viking 175 leverages DOHC and VTEC for reliability, durability, and fuel efficiency.

2. Popular Choice:

   • Builders of experimental aircraft, especially those flying Rans and Zenith models, favor the Viking 175.

   • Pilots appreciate its reliability, ease of installation, and impressive performance.

HISTORY ON THE K SERIES

The reason why the K20 is so amazing is the head airflow its valves are relatively large 35 millimeter intakes and 30 millimeter exhaust valves using 5.5 millimeter valve stems.

The K20 reigns supreme, even when you rank the K-Series engines from worst to best. Introduced in 2001, the K20 was the replacement for the Honda B-series, introducing a four-cylinder engine with DOHC configuration, coil-on-plug ignition coils, and a digitally controlled ignition. As the name suggests, the K20 is a 2.0-liter engine with 221 hp and 159 lb-ft of torque, and its powerful punch was popular enough to spawn the entire Honda K-Series. The horsepower fluctuated with later versions, with the K20A1, K20A2, K20A3, and K20A4 having 159, 200, 160, and 150 hp, respectively. 

Eventually, Honda released a range of K20Z and K20C engines. The K20Z1 was an updated version with 210 hp. The K20Z2 replaced the K20A1 with 153 hp, the K20Z3 had 197 hp, and the K20Z4 increased to 201 hp. The K20C1 was a turbocharged engine with 306 hp, inspiring the K20C3 and 4, which had 272 hp and 252 hp. Meanwhile, the K20C2 was Honda's return to economy-range engines, offering 158 hp.

The original K20 was exclusive to the Japanese Domestic Market (JDM). It was inside Japan's Honda Civic Type R and Integra Type Rs from 2001 to 2006. The K20A also came in 2002 to 2008 models of the Honda Accord Euro R and Civic Type Rs from 2007 to 2011. First-generation Honda Streams, which ran from 2001 to 2006, had the K20A1 engine in the RN3 and RN4 models.

The K20A2 engine was available in Honda Civic Type R models from 2001 to 2006 in the European Domestic Market (EDM) and the Acura RSX Type S from 2002 to 2004. It also went down under, featuring in Australian and New Zealand Domestic Markets in the Honda Integra Type R from 2002 to 2004.

More widespread than the others, the K20A3 was in the 2002-2006 Acura RSX and the Honda Civic Si, SiR, and Type S models from 2002-2005. It was also in the Southeast Asian Civic 2.0 i-VTEC from 2003 to 2006. European and Australian Honda Accords from 2003 to 2006 featured the A20A6 with 155hp.

Given that the K20Z served as upgraded versions of the A series, they are in many of the same vehicles. For example, the K20Z1 was a mid-model update to the A series, so it was in the final years of the Acura RSX's production in 2005 and 2006. However, unlike the K20As, you can still get your hands on a modern-day Z series engine in the 2024 Honda HR-V. The compact crossover SUV has a K20Z5 engine inside it, offering 158 hp and 138 lb-ft of torque. The K20Z5 has been powering the Honda HR-V since the 2023 model.

Unlike the others, the K20Cs are readily available in many Honda cars. The K20C1 has been a staple of the Honda Civic Type R since 2015 in both the European and United States markets. The engine is readily available in the 2024 Type Rs and the Acura Integra Type S.

The United States market received the K20C2 via the Honda Civic LX in 2016, and the engine continues powering the sedan's latest model. Around the same time, the K20C2 made a pit stop on the racetrack, appearing in the Formula 4 United States Championship from 2016 to 2023.

Hoisting the 175. Need one 8x1.25mm bolt and one 10x1.2mm bolt