• 4g91 Carburetor Manual
• 4g91 Carburetor Manual Transmission
• 4g91 Carburetor Manual Download
• 4g91 Carburetor Manual Pdf
• 4g91 Carburetor Manual Diagram

Carburetor (T2075-81000) 8. Lever, choke (T2070-82410) 9. Air-funnel (848ES08300) 10. Spacer (1142-83110) 11. Screw (0263-30555) Make sure that gasket and carburetor are mounted as the picture. If carburetor is mounted upside down position, the engine does not start as carburetor does not work correctly. CAUTION Fig.1 Fig.2: Affix the gauge. MANUAL MIXTURE CONTROL. – The Carburetor has a manual mixture control, which adjusts the Carburetor for all throttle positions and loads. It is not normally employed under 5,000 feet msl. – Both primary and secondary idle air vents ensure proper air and fuel emulsion for starting and idling.

Download the Carb Tuning Guide

Watch the Super E & G Carb Basic Setup video

1. Verify carburetor is set to stock settings:
• Idle mixture screw, 11/4 turns from lightly seated.
• Idle speed screw, ½ turn clockwise from engagement point.
• Accelerator adjustment screw, two turns counter-clockwise from seated.
2. Start bike, bring to operating temperature.
3. Set idle speed adjusting screw, clockwise to increase rpm, counter-clockwise to decrease rpm. Idle rpm range should be 950 to 1050 rpms.
4. Adjust idle mixture by turning idle mixture screw slowly clockwise until the engine runs poorly. Note position. Slowly turn the screw counter-clockwise until it starts to stumble. Note position. Set the idle mixture screw halfway between the positions, or at the strongest idle.Inconsistent idle may indicate a manifold leak.
5. With engine idling, turn accelerator adjustment screw clockwise until it lightly seats. Snap throttle open—engine should stumble. Turn screw counter-clockwise ¼ or ½ of a turn at a time, until engine responds to throttle twist with smooth, quick response.
6. Ride motorcycle in various rpm ranges, and then try to maintain a consistent 40- to 50-mph. If the engine has a flat spot, or is popping/sneezing in the air cleaner, it can indicate a lean condition. If you notice stumbling or sputtering, it can indicate a rich condition.
7. Low rpm operation is controlled by the intermediate jet (#11). If sneezing or popping is experienced below approximately 3000 rpm’s the intermediate jet must be replaced with a larger sized (richer) jet. If the engine does not run smoothly at low speeds, fouls plugs, blows black smoke or gets bad gas mileage a smaller (leaner) intermediate jet needs to be installed. Always readjust the idle mixture (#2) and idle speed (#1) screws after making a jet change.
8. To test the main jet, do a roll-on from 50-mph to 70-mph in 3rd gear. If the engine backfires or breaks up in the carb, increase the main jet size .004'. If the engine is flat or will not accelerate, decrease the main jet by .004'.
9. Since 2004 S&S shorty carbs have been fitted with an adjustable main jet air bleed (#13). Changing this jet to a larger size will delay the signal to the main jet, therefore aiding with high speed tuning as described in step 8. This also aides with tuning an engine that is fitted with an exhaust system that is not intended for high performance. The air bleed uses main jets, the stock size is 40. If it needs to be changed the range is normally 50 to 60.
10. NOTE: Drag or straight pipes, especially large diameter or long designs, can prevent you from obtaining optimum carburetor performance.
11. If the S&S teardrop air cleaner is being replaced with an aftermarket air cleaner, be sure to remove the auxiliary bowl vent screw (#14). Never use a velocity stack on a street driven motorcycle! Poor throttle response will be experienced.
12. Always be sure to attach the hose to the overflow tube fitting (#6) and route it toward the back of the engine.

4g91 Carburetor Manual

The Mitsubishi 4G9 engine is a series of straight-4automobile engines produced by Mitsubishi Motors. All are 16-valve, and use both single- and double- overhead camshaft heads. Some feature MIVECvariable valve timing, and it was the first modern gasoline direct injection engine upon its introduction in August 1996.

4G91[edit]

The 4G91 uses a bore and stroke of 78.4 mm × 77.5 mm (3.09 in × 3.05 in) for a total displacement of 1.5 L (1,496 cc). With a 9.5:1 compression ratio and DOHC, four-valve-per-cylinder head and multi-point EFI, this engine produces 115 PS (85 kW; 113 hp) at 6,000 rpm and 135 N⋅m (100 lb⋅ft) at 5,000 rpm.^[1] The 4G91 was a short-lived model, mainly built between 1991 and 1995 and rarely seen in export markets. There was also a carbureted model, with 97 PS (71 kW; 96 hp) at 6,000 rpm and 126 N⋅m (93 lb⋅ft) at 3,500 rpm.^[1]

Applications

4G92[edit]

The 4G92 displaces 1.6 L (1,597 cc). First appeared in late 1991 Japanese spec Mirage RS and Super R in DOHC form, it is basically bored out to 81 mm (3.19 in) and tuned version of the 4G91 producing 120 PS (88 kW; 118 hp). Later was introduced fuel-efficient SOHC version. But 4G92 is best known of its high-performance MIVEC equipped DOHC version, which fully replaced 'ordinary' DOHC in 1993. Power output raised as high as 170 PS (125 kW; 168 hp), as found in the Mirage Cyborg-ZR and JDM ’92 Lancer MR, making it one of the most powerful 1.6-litre naturally aspirated engines. A modular displacement (MD) version of the 4G92 MIVEC was also produced – MD is Mitsubishi's cylinder deactivation system which helps improve fuel consumption.

4G92P SOHC 16 Valve

• Total Displacement - 1.6 L (1,597 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 77.5 mm (3.05 in)
• Compression Ratio - 10.0:1
• Maximum Output (1) - 83 kW (113 PS; 111 bhp) at 6,000 rpm, and 137 N⋅m (101 lb⋅ft) at 5,000 rpm
• Maximum Output (2) - 69 kW (94 PS; 93 bhp) at 5,500 rpm, and 135 N⋅m (100 lb⋅ft) at 4,000 rpm
  • (1): Early European and JDM versions with 20°/42° intake and 54°/2° exhaust valve timing
  • (2): General export and later European versions with 14°/58° intake and 52°/16° exhaust valve timing

4G92 DOHC 16 Valve

• Total Displacement - 1.6 L (1,597 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 77.5 mm (3.05 in)
• Compression Ratio - 11.0:1
• Maximum Output - 108 kW (147 PS; 145 bhp) at 7,000 rpm
• Maximum Torque - 149 N⋅m (110 lb⋅ft) at 4,500 rpm

4G92-MIVEC DOHC 16 Valve

• Total Displacement - 1.6 L (1,597 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 77.5 mm (3.05 in)
• Compression Ratio - 11.0:1
• Maximum Output - 125 kW (170 PS; 168 bhp) at 7,500 rpm
• Maximum Torque - 167 N⋅m (123 lb⋅ft) at 7,000 rpm

Applications

4G93[edit]

The 4G93 is a 1.8 L (1,834 cc) engine available in both SOHC and DOHC versions. Turbocharged variants are also produced. In mid 1996 Mitsubishi released a gasoline direct injection (GDI) version of the 4G93. This GDI model saw a production of over a million units though it was a heavy polluter therefore only sold in the Japanese market. A partially cleaned up version (with less power) was later sold in Europe, and was among the first of the modern GDI engines. It brought good fuel economy and, if well serviced, long engine life.

4G93 SOHC 16 Valve MPI

• Multi-Point Injection (MPI)
• Total Displacement - 1.8 L (1,834 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 89 mm (3.5 in)
• Compression Ratio - 9.5:1
• Maximum Output - 86 kW (117 PS; 115 bhp)
• Maximum Torque - 166 N⋅m (122 lb⋅ft)

4G93 SOHC 16 Valve Carburetor

• Carburetor
• Total Displacement - 1.8 L (1,834 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 91 mm (3.6 in)
• Compression Ratio - 9.5:1
• Maximum Output - 74 kW (101 PS; 99 bhp)
• Maximum Torque - 154 N⋅m (114 lb⋅ft)

4g91 Carburetor Manual Transmission

4G93 DOHC 16 Valve MPI

• Multi-Point Injection (MPI)
• Total Displacement - 1.8 L (1,834 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 89 mm (3.5 in)
• Compression Ratio - 10.5:1
• Maximum Output - 103 kW (140 PS; 138 bhp) @ 6,500 rpm
• Maximum Torque - 167 N⋅m (123 lb⋅ft) @ 5500 rpm

4G93T DOHC 16 Valve Turbo

• Multi-Point Injection (MPI) with TD04 turbocharger
• Total Displacement - 1.8 L (1,834 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 89 mm (3.5 in)
• Compression Ratio - 8.5:1 (Upgraded to 9.1:1 in 1994)
• Maximum Output - 143 kW (194 PS; 192 bhp) @ 6,000 rpm (Upgraded to 151 kW (205 PS; 202 bhp) in 1994, and again to 158 kW (215 PS; 212 bhp) in 1995)
• Maximum Torque - 270 N⋅m (199 lb⋅ft) @ 3,000 rpm (Upgraded to 275 N⋅m (203 lb⋅ft) in 1994, and again to 284 N⋅m (209 lb⋅ft) in 1995)

4G93 DOHC 16 Valve GDI

• Gasoline Direct Injection (GDI)
• Total Displacement - 1.8 L (1,834 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 89 mm (3.5 in)
• Compression Ratio - 12.0:1
• Maximum Output -
  • Europe: 88 kW (120 PS; 118 bhp) @ 5,250 rpm / 90 kW (122 PS; 121 bhp) @ 5,500 rpm / 92 kW (125 PS; 123 bhp) @ 5,500 rpm
  • Japan: 96 kW (131 PS; 129 bhp) @ 5,500 rpm / 96 kW (131 PS; 129 bhp) @ 6,000 rpm / 110 kW (150 PS; 148 bhp) @ 6,500 rpm
• Maximum Torque -
  • Europe: 174 N⋅m (128 lb⋅ft) @ 3,500 rpm / 174 N⋅m (128 lb⋅ft) @ 3,750 rpm
  • Japan: 181 N⋅m (133 lb⋅ft) @ 3,500 rpm / 177 N⋅m (131 lb⋅ft) @ 3,750 rpm / 178 N⋅m (131 lb⋅ft) @ 5,000 rpm

4G93 DOHC 16 Valve GDI Turbo

• Gasoline Direct Injection (GDI) with turbocharger
• Total Displacement - 1.8 L (1,834 cc)
• Bore - 81 mm (3.19 in)
• Stroke - 89 mm (3.5 in)
• Compression Ratio - 10.0:1
• Maximum Output - 118 kW (160 PS; 158 bhp) @ 5,200 rpm / 121 kW (165 PS; 162 bhp) @ 5,500 rpm
• Maximum Torque - 220 N⋅m (162 lb⋅ft) @ 3,500 rpm / 220 N⋅m (162 lb⋅ft) @ 3,500 rpm

Applications

• Mitsubishi Colt GTI
• Mitsubishi Galant 1996

4G94[edit]

The 4G94 is a 2.0 L (1,999 cc) version built in Japan, used in the Mitsubishi Lancer. It has a cast iron engine block with Multi-point fuel injection and an aluminum SOHC cylinder head with forged steel connecting rods and four valves per cylinder. The 4G94 Also comes in the GDI DOHC variant which can be found in the Mitsubishi Galant.

4G94 SOHC 16 Valve MPI

• Multi-Point Injection (MPI)
• Total Displacement - 2.0 L (1,999 cc)
• Bore - 81.5 mm (3.21 in)
• Stroke - 95.8 mm (3.77 in)
• Compression Ratio - 9.5:1
• Maximum Output - 92 kW (125 PS; 123 bhp) @ 5,200 rpm
• Maximum Torque - 176 N⋅m (130 lb⋅ft) @ 4,250 rpm

4g91 Carburetor Manual Download

4G94 DOHC 16 Valve GDI

• Gasoline Direct Injection (GDI)
• Bore - 81.5 mm (3.21 in)
• Stroke - 95.8 mm (3.77 in)
• Compression Ratio: 11.0:1
• Maximum Output: 107 kW (145 PS; 143 bhp) / 5,700 rpm
• Maximum Torque: 19.5 kg⋅m (191 N⋅m; 141 lb⋅ft) / 3,750 rpm

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Applications

4g91 Carburetor Manual Pdf

See also[edit]

References[edit]

1. ^ ^abBüschi, Hans-Ulrich, ed. (10 March 1994). Automobil Revue 1994 (in German and French). 89. Berne, Switzerland: Hallwag AG. p. 388. ISBN3-444-00584-9.

4g91 Carburetor Manual Diagram

• 'The Mitsubishi 4G9x Engine Guide', Michael Knowling, Autospeed, issue 389, July 17, 2006
• 'GDI engine production tops 1,000,000 unit mark', Mitsubishi Motors press release, September 11, 2001