User:Ridge Runner/Sandbox/cars

From Wikipedia, the free encyclopedia
Jump to: navigation, search
2ZZ-GE Engine in the Corolla XRS
Supercharged 2ZZ-GE installed in Lotus Elise SC
Disintegrated oil pump

The 2ZZ-GE is a Toyota 1.8 L (1796 cc or 109.6 in³) engine built in Japan. Bore is 82 mm (3.23") and the stroke is 85 mm (3.35"). It uses MFI fuel injection, has VVTL-i, and features forged steel connecting rods. Compression ratio is 11.5:1, necessitating "premium" gasoline (91 octane or above in the (R+M)/2 scale used in North America[1]). Power output for this engine varies depending on the vehicle and tuning, with the Toyota Celica, Toyota Corolla T-Sport [2] [3], Lotus Elise and Lotus Exige offering 141 kW (189 hp) but the American versions of the 2003 Toyota Corolla, Toyota Matrix, and Pontiac Vibe versions only developing 180 hp[1] with all later years offering anywhere from 173 hp in 2004 to 164 hp in 2006 due to a recurved powerband. The differing power numbers from 2004 through 2006 are due to changes in dynamometer testing procedures. The Australian variant Corolla Sportivo is 141 kW@7600 and 181N·m Torque due to noise regulations. (Toyota recalled them for a flash of the PCM to up their output to classify them in the more lenient "sports car" noise category.) The Corolla Compressor and Lotus Exige S add a supercharger to achieve 225 hp (168 kW), while the Exige 240R's supercharger increases output to 240 hp (179 kW).

Unique to the ZZ family, the 2ZZ-GE utilizes a dual camshaft profile system (the "L" in VVTL-i, known by enthusiasts as "lift") to produce the added power without an increase in displacement or forced induction. The table below lists the specifications of the camshafts. This is similar in concept to Honda's i-VTEC, but the two systems are very different in design and execution.

Excluding the 2003 MR2, the engine is also the only model in the ZZ engine family to use a six-speed manual transmission, as well as the only one to have been available with a four-speed Tiptronic-style automatic. These gearboxes were unique to this engine; since then, only a few Toyota engines have been paired with either a six-speed manual or a Tiptronic-style automatic (and only one other engine, the 4GR-FSE, has received both).

Toyota commissioned Yamaha to design the 2ZZ-GE and it shares several similarities with street bike engines, the most notable being the relatively high RPM design. The high-output cam profile is not activated until approximately 6,200 rpm (the exact point of engagement is different depending on the vehicle, year, and PCM involved) and will not engage until the engine is sufficiently warmed up. The Toyota PCM electronically limits RPM to about 8200 RPM (or 8400 RPM in some earlier cars) via fuel and/or spark cut. Consequently, it's impossible to "over-rev" the engine with the throttle alone; a downshift from a higher gear must be involved. A typical "over-rev" can damage the oil pump, commonly disintegrating the lobe ring, resulting in damage similar to the picture at right. The oil pump is the Achilles heel of the 2ZZ, though incidents are rare and usually occur due to fault of the driver. Unfortunately, starving this particular design of oil is almost always fatal to the engine, even when caught quickly.

The engine will easily run at speeds of around 4,000 rpm for extended periods of time and is designed to periodically run at the 8,400 RPM redline without issue. For the first few years of production, the engines were notorious for failing "lift bolts". This didn't damage the engine, but would hamper performance, as the high output cam profile was unable to properly engage. Toyota fixed the problem in late 2002 with a redesigned bolt that was installed on later engines. Earlier engines with the problematic bolts can be fixed via a Toyota-issued TSB simply requiring the new bolt to be installed in place of the old one.

Also, 2004 and newer Matrix and Corolla XRSes were sold with smog pumps and have an extra hole in the engine block and header where the "air" is extracted for induction into the intake.

Specifications[edit]

Displacement 1795 cc (109.6 in³)
Bore X Stroke 82 mm (3.23") X 85 mm (3.35")
Compression Ratio 11.5:1
Bore Height 87.5 mm (3.45")
Bore Wall 5.5 mm (0.22")
Valve Diameter Intake: 34 mm (1.34")

Exhaust: 29 mm (1.14")

Dry Weight 115 kg (250 lbs)
Camshaft Intake Exhaust
Duration Valve lift Duration Valve lift
Low Cam 228° 7.6mm 228° 7.6mm
High Cam 292° 11.2mm 276° 10.0mm

Applications[edit]

Vehicle Region HP kW PS
Toyota Celica SS-II Japan 187 140 190
Toyota Celica GT-S North America 180 134 183
Toyota Celica 190/T-Sport UK 189 141 191
Toyota Corolla Sportivo Australia 189 141 191
Toyota Corolla TS Europe 189 141 191
Toyota Corolla Compressor Europe 222 166 225
Toyota Corolla XRS North America 164-170 122-127 166-172
Toyota Corolla Fielder Japan 189 141 191
Toyota Corolla Runx Japan 189 141 191
Toyota Matrix XRS North America 164-180[1] 122-134 166-183
Pontiac Vibe GT North America 164-180[1] 122-134 166-183
Lotus Elise North America, UK 190[4] 142 193
Lotus Exige North America, UK 190[5]

243[6]

142

181

193

246

Lotus Exige Supercharged North America, UK 243[6] 181 246

References[edit]

  1. ^ a b c d "The Next Band Wagons" - Motor Trend, Chris Walton. May 2002
  2. ^ http://www.zeperfs.com/fiche367.htm
  3. ^ http://web.archive.org/web/20050509154910/motor.terra.es/motor/contactos/c_ficha.cfm?id=MOT21278
  4. ^ "Lotus Elise R - Vehicle Description". Group Lotus PLC. Retrieved 2008-06-24. 
  5. ^ Chris Walton (2006-06-28). "Full Test: 2006 Lotus Exige". Edmunds Inc. Retrieved 2008-06-24. 
  6. ^ a b Greg N. Brown. "Newcomers: 2007 Lotus Exige S". MotorTrend. Source Interlink Media, Inc. Retrieved 2008-06-24. 

[[Category:Toyota engines]]