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Contents 1 Old Infiniti G20 entry for me to play with 1.1 Marketing 1.2 Engine 1.3 Body, Suspension & Steering 1.3.1 P10 1.3.2 P11 1.4 Brakes 1.4.1 P10 1.4.2 P11 1.5 Exterior Dimensions 1.5.1 P10 1.5.2 P11 1.6 Interior Dimensions 1.6.1 P10 1.6.2 P11 1.7 Capacities 1.7.1 P10 1.7.2 P11 1.8 First Generation 1991-1996 (P10) 1.9 Second Generation 1999-2002 (P11) 1.10 End of Production 1.11 Tuning 1.11.1 Engine Modifications 1.11.1.1 Engine Upgrades 1.11.1.2 Engine Swaps 1.11.2 Transmission 1.11.3 Suspension 1.11.4 Wheels 1.11.5 Brakes 1.11.6 Other 1.12 G20 community 1.13 Additional Facts 1.13.1 Paint codes 1.13.2 Keyless entry (fob) part numbers 1.13.3 Sales by Calendar Year (CY) 1.13.4 Common reliability problems 1.14 Awards 1.15 Gallery 1.16 External links 1.17 External links 1.18 Notes 2 G20 Ideas

[edit] Old Infiniti G20 entry for me to play with

The G20 was Infiniti's entry-level luxury car during most of the 1990s and into the 2000s. The G20 was a product of badge engineering as it was virtually identical to the Japanese/European market Nissan Primera sedan, although the G20 offered a variant of Nissan's 2.0 liter inline 4-cylinder engine. Two generations of the G20 exist in the United States, the HP10 (P10), built from 1991 to 1996, and the HP11 (P11), built from 1999 to 2002. Two major trim packages were offered: Touring, badged G20t, available from model years 1994 to 1996 and 1999 to 2001, and Sport (with no badge modification) which was offered during model year 2002. All G20s were front-wheel drive and were built in Oppama, Japan.

[edit] Marketing

The G20 was marketed in the United States as a competitor to European luxury sport coupes such as the BMW 3-series, reflected in advertisements with the tagline "Born in Japan, Educated in Europe, Now Available in America." However, at dealers it was marketed primarily to middle-aged professional women, and as such was not as popular as its main competition, the similarly-priced Acura Integra. Therefore, despite the lofty ambitions of the Nissan marketing department, it only achieved niche status as a competitor to other contemporary offerings from Acura and BMW.

As previously mentioned, the G20 was a badge-engineered version of the Nissan Primera, but because Infiniti was pitched as a premium brand, it featured a high level of equipment compared to its European and Japanese relatives. Power windows, locks, and mirrors, air conditioning, four-wheel disc brakes with ABS, alloy wheels, a theft-deterrent system, cruise control, floor mats, and a leather-wrapped steering wheel and gearshift knob were all standard. Leather and a power moonroof were common options, and were later offered in a package that included power seats and keyless entry. Later models also featured dual front and eventually side-impact airbags, and almost all P11s had automatic climate control.

[edit] Engine

The G20 was powered by an electronic sequential multi-point fuel injectioned transversely mounted DOHC NA reciprocating internal combustion engine, the SR20DE, a 2.0 liter (1998 cc) square (Bore × Stroke: 86.0 × 86.0 mm or 3.39 in. X 3.39 in.) Inline 4-cylinder. This engine was also shared with the US-spec Nissan Sentra/Nissan 200SX SE-R, Nissan NX2000, and a host of non-US Nissan vehicles. The particular engine used in the G20 produced 140 crank horsepower at first, and 145 in '00+ editions (116 to 126 whp; stock range) and 132 ft·lbf or 136 ft·lbf of torque (111 to 120 wft·lbf; stock range). These engines were also fairly high-revving with a redline of 7450 rpm for 1991 through 1996 editions, 6950 rpm for the 1999 edition, and 6750 rpm for 2000+ editions. Like other SR-powered cars, the G20 has become extremely popular among "tuners" who like the engine for its flexibility, reliability, fuel economy and high power-handling capabilities. These factors combined with a low buy-in cost have caused used SR-powered Sentras, 200SXs and G20s to become popular and prominent in the tuner or "import scene" subculture.

There were three major variants of the SR20DE used in the G20. The first, used from 1991 to 1993.5, was the highport, in which the injectors and fuel rail were located above the intake plenum. In 1994, due to tightening emissions restrictions, Nissan switched to a lowport design, in which the injectors/fuel rail and the intake plenum switched places. This design also featured a milder intake camshaft; switching it out for the highport intake cam is a popular upgrade to gain more power. This design was used from 1994 to 1996 and again in 1999. In 2000 Nissan replaced the valvetrain with a roller-rocker lifter design in place of the hydraulic lifters previously used, but kept the lowport intake design; many performance parts are not interchangeable between roller-rocker and highport/lowport engines, most notably camshafts.

[edit] Body, Suspension & Steering

[edit] P10

The P10 was given an all-steel unibody with front bumper and side fender panels. The front suspension for the P11 follows an independent multi-link with coil springs and stabilizer bar design.

[edit] P11

The P11 was given an all-steel unibody with front bumper and side fender panels. The front suspension for the P11 follows an independent multi-link with coil springs and stabilizer bar design. While the rear suspension follows a rear multi-link beam and stabilizer bar design. Steering is managed engine-speed-sensitive power-assisted rack-and-pinion steering. The relatively stiff frame, the firm suspension, and steering system couple to provide class leading high speed handling. However, with a steering ratio of 17.70 and a turns from lock to lock of 3.28 turns leads to a bottom of class turning circle (curb to curb) of 37.4 feet.

[edit] Brakes

[edit] P10

[edit] P11

[edit] Exterior Dimensions

[edit] P10

[edit] P11

[edit] Interior Dimensions

[edit] P10

[edit] P11

[edit] Capacities

[edit] P10

[edit] P11

[edit] First Generation 1991-1996 (P10)

The first 1991 G20 was completed on July 10, 1990. The final 1996 G20 was completed on July 19, 1996. The P10 featured the first application of Nissan's multi-link front suspension in a front-wheel-drive car, with an independent strut setup in the rear. It came standard with a 5-speed manual transmission. The only options to begin with were an automatic transmission, leather interior, and a power glass moonroof; a Touring package (labeled G20t) was introduced in 1994 and featured a black leather interior with sport front buckets and fold-down rear seats, as well as a limited-slip differential in the transmission and a spoiler on the rear decklid.

The main changes for the P10 came as a midyear refresh in 1993 (model year 1993.5), when dual airbags replaced motorized seatbelts, leather interiors came standard with power front seats, body-colored side moldings replaced matte-black ones, and the audio system was upgraded to six speakers with a CD player instead of the previously-standard cassette deck. In addition, the 1994 model year was given a new chrome grille, a lowport engine (replacing the original highport SR20DE in which the intake plenum is below the fuel injectors and fuel rail), and larger 195/60R14 tires. The 1993 1/2 model year also saw the air conditioner converted from R12 to R134a refrigerant, a change in the vehicle's self-diagnostic system to OBD-II, and other new options such as remote keyless entry. The G20 was temporarily discontinued after the 1996 model year, leaving the I30 as Infiniti's lowest-priced car for the 1997 model year.

[edit] Second Generation 1999-2002 (P11)

The second-generation G20 underwent several changes, including adopting the multi-link beam rear suspension very similar to the 1995-1999 Nissan Maxima with a continued use of the independent multi-link strut front suspension of the P10 (similar to 300ZX and Skyline GT-R). Despite enthusiasts' aversion to the beam, several publications praised the handling of the updated G20^[1]. The P11 has a lateral grip figure of between 0.80 and 0.94g plus a 61/39 weight distribution (61% front/39% rear). With the increased size and luxury options, however, the stock 140-145 crank horsepower engine was seemingly underpowered.

The first second-generation 1999 G20 was completed on May 18, 1998. The final second-generation 2002 G20 was completed on January 11, 2002. All models featured a higher level of standard equipment than the P10, including automatic climate control on all but the 1999 models with cloth seats, 15" 16-spoke alloy wheels, a higher-quality double-DIN Bose radio/CD/cassette player standard, keyless entry, standard power moonroof, and later, side-impact airbags. The Touring models continued to feature a limited-slip differential, but also had unique 12-spoke alloy wheels, and the upgraded sports seats were now available in beige leather and "sport cloth" (the latter as a factory-order option) in addition to the previously-offered black leather.

Several noteworthy changes for the P11 came as a refresh in the 2000 model year, when the 145 crank horsepower roller rocker variant of the SR20DE engine was implemented, newer automatic and manual transmission variations were introduced, anti-theft immobilizer circuitry was added, anti-glare side mirrors became standard, and a remote trunk release was added to the keyless entry fob. In 2002, the G20t was dropped and a Sport model was introduced; in addition to the prior G20t's limited slip differential and decklid spoiler, this model featured two-tone leather/suede sport seats, 16" wheels, and a variety of minor cosmetic modifications. The 2002 base G20 received the 12-spoke Touring alloy wheels as standard.

[edit] End of Production

The G20 was discontinued in favor of 2003's rear wheel drive G35, a badge engineered export version of the JDM V35 Nissan Skyline which was introduced in 2001. The G35 received significant praise from the automotive press and became a sales success for Infiniti despite being priced approximately USD$5,000 above the G20's average MSRP of $23,000, in the dollars of the time. The G35, significantly larger and more powerful than the G20, was aimed more at the entry luxury-sports car market instead of the G20's luxury-sport compact market. The Nissan Primera was continued as the slightly restyled HP11-144 and the significantly restyled HP12 in non US markets with a final end to all production in 2006 as a 2007 model.

[edit] Tuning

[edit] Engine Modifications

[edit] Engine Upgrades

Forced induction (turbocharging) is often used to upgrade SR20DE powered G20s to higher levels, as much as 200 to 300 whp. Because the turbocharged SR20DET has a very similar design to the SR20DE, many components from the former can easily be used with the latter. More common than forced induction upgrades are the use of bolt-on aftermarket parts such as intakes and exhausts. Using only the bolt-ons, around 155 whp is possible.

Common engine modifications can include intakes (WAI, CAI), intake manifold, larger MAF, larger fuel injectors, fuel rail, header, exhaust (cat back, axle back), underdrive pulleys, lightened flywheel, camshafts, camshaft gears, pistons, valvetrain (7500 to 9000 rpm), headwork, and bore or stroker kits (2.2 to 2.4 L). As the SR20DE is a popular tuning engine there are also vast numbers of unusual or custom upgrades.

[edit] Engine Swaps

With certain SR20DET engine swaps, high levels of around 400 whp are possible. The newer Nissan SR engines can also be swapped into the G20. Factory turbocharged SR20VET Neo-VVL swaps are possible but rare, and output is difficult to estimate. The naturally aspirated SR20VE Neo-VVL can also be used in an engine swap which can (with bolt-ons) generate around 190 whp and can also be turbocharged. Front-wheel drive VQ35DE swaps are also theoretically possible.

[edit] Transmission

Common manual transmission modifications include: Cryo treating, shot peening, transmission case welding, aftermarket LSD, aftermarket axles, and aftermarket clutches. Common automatic transmission modifications include: Built valve body, aftermarket torque converters, ATF coolers, inline additional ATF filter, and aftermarket TCU. A higher rated torque converter from an AWD SR20DET powered car can in theory be used.

Stock manual transmissions are typically usable up to approximately 250 whp, while stock automatic transmissions can only handle about 155 whp. Most front wheel drive transmissions from other SR powered cars can be used with few modifications. Higher rated (425whp/400wtq) transmission swaps from front-wheel drive QR or VQ powered cars such as the 2002-2006 Nissan Sentra SE-R Spec-V are also theoretically possible.

[edit] Suspension

Common suspension modifications include lowering springs, shocks, coilovers, strut bars (front and rear), pillow-ball strut mount (front only for P11 with front and rear for P10), sway bar (rear), lower control arm braces, and traction bars.

[edit] Wheels

P10 tire fitments:

• 195/60/14 - 23.2 in. diameter (35-45 mm offset required) - ('91-'93.5 P10 & '94-'96 Touring)
• 195/65/14 - 24 in. diameter (35-45 mm offset required) - ('94-'96 P10 Standard)

centerbore = 66.1 mm bolt pattern = 4x114.3 mm

P11 tire fitments:

• 195/65/15 - 25 in. diameter (35-45 mm offset required) - ('99-'02 Standard)
• 195/60/15 - 24.2 in. diameter (35-45 mm offset required) - ('99-'01 Touring)
• 205/50/16 - 24.1 in. diameter (35-45 mm offset required) - ('02 Sport)

centerbore = 66.1 mm bolt pattern = 4x114.3 mm

[edit] Brakes

Common brake modifications can include calipers, pads, and steel brake lines. Several "big brake" kits are available which fit oversized brake systems.

[edit] Other

Aftermarket ECU and various engine management systems are available, as are carbon fiber body parts and various body kits. "Universal" parts such as steering wheels and seats can often be used. Also, several OEM Nissan Primera parts from around the world (primarily JDM and UKDM) can be used; these parts include dual lamp headlights and rain guards. Custom parts are sometimes fabricated by G20 owners; these include fuel rails, big brake kits, and custom body pieces (eyebrows, bumper lips, grilles).

[edit] G20 community

As with many "tuner" cars, G20 owners have fostered a strong sense of community, largely through the internet. Owners often partake in group buys of brand name products for a collective discount, with some internet forums seeing as many as one group buy request every four days.^[2] Members of the community may also congregate in a car tuning "meet", where multiple owners meet in person to talk about their love of the G20 and gain camaraderie with fellow G20 fans.

[edit] Additional Facts

[edit] Paint codes

[edit] Keyless entry (fob) part numbers

[edit] Sales by Calendar Year (CY)

[edit] Common reliability problems

• Fifth-gear pop-out - On pre-1994 manual transmission models, a flawed 5th gear synchro can cause the transmission to pop out of gear when under load (accelerating or going uphill). To lower chance of pop-out, do not rest one's hand on the gear lever.

• Blower resistor - Failure of this component can cause the climate control to get stuck at the highest blower setting.

• Automatic Transmission Kick Down Sensor - This silver-colored box bolted to the driver side fender under the hood can cause the automatic transmission to shift roughly on the P10.

• Power antenna - The mast can get stuck, or the motor can burn out. To lower chance clean the outside of the raised mast of contaminants.

• Automatic seatbelts - Used only in model years 1991-1993, they may get stuck; there is a recall pertaining to this problem.

• P10 fuel pump failure - occurs with low levels of gasoline. To lower chance of fuel pump failure, remain above 12.5% or 1/8 of a tank; alternately, keep fill-ups under 13.913 gallons.

• Power steering hose leaks - due to faulty OEM "clamps". Replace them with better aftermarket clamps to avoid possible corrosion of other engine components.

• Starter motor - Failure of this part is common in both the P10 and P11, particularly in the 2000+ P11.

[edit] Awards

The G20 earned many automotive awards over its lifespan:

• Car and Driver: 1991 (April & September) High marks for suspension and value.
• IntelliChoice: 1993 “Best Overall Import Car Value Over $13,000” and “Best Value in Compact Class Over $16,000.”^[3]
• J.D. Power and Associates: 1996 Top Score in Customer Satisfaction Index.^[4]
• J.D. Power and Associates: 1997 Second Highest Scorer in Customer Satisfaction Index.
• IntelliChoice: 1999 G20 and G20t “A Best Overall Value - Compact Sedan Over $15,000.”^[5]
• CAR Magazine: Rated One of the Top 10 Best Handling Cars in the World (P11) McCullough, Mitch (1998), Driving Impression: 1999 Infiniti G20t (October 1998 ed.), Sport Compact Car, <http://www.sportcompactcarweb.com> 

[edit] Gallery

Aztec Red, base P11

Sandrock Beige, base P11

Silver Crystal, touring P10

Black Obsidian, base P10

[edit] External links

[edit] External links

• G20.net
• SR20 Forum
• Koojo's Turbocharged 2000 Infiniti G20
• Gdub.net
• Free G20 (1996-2002) owner's manuals (pdf) from Nissan
• Coleman, Dave (1998), Technobabble: Multilink and the Beam (November 1998 ed.), Sport Compact Car, <http://www.se-r.net/about/g20/scc/oct98/tb.html> 
• Primera Technical help site
• New Zealand Primera Car Club
• The Official Forum of the NYCGs (New York area G20/Primera Club)
• McCullough, Mitch (1998), Driving Impression: 1999 Infiniti G20t (October 1998 ed.), Sport Compact Car, <http://www.sportcompactcarweb.com> 

[edit] Notes

v • d • e Infiniti, a marque of Nissan Motor Co., Ltd., road car timeline, 1990s–present
Type	1990s										2000s
	0	1	2	3	4	5	6	7	8	9	0	1	2	3	4	5	6	7	8	9
Entry-level		G20								G20				G35				G35
Mid-size							I30				I30 / I35
				J30										M45			M35 / M45
Full-size	Q45							Q45					Q45
Coupe	M30													G35C					G37
Crossover																			EX35
														FX35 / FX45						FX35 / FX50
SUV								QX4							QX56

pt:Infiniti G20

[edit] G20 Ideas

• Maybe add gear ratio data
• Add more photos (stock cars, tuned cars, interior, sport and touring differences, etc.)
• Stock info section (wheels, interior vol, etc.)
• Top speed, MPG, other stats
• Add rare upgrades
• Find data on number of G20 still in existence
• Find weight distro for P10
• Find patents which state Prius style is based off of P11.
• Add style mods (cluster rings, rear window wing, front lip)
• Add more refs
• Fill in missing proper G20 paint code names.
• Decode ID number / destination number.
• Compression ratio difference between RR and non-RR.
• Pop culture (ads, games, etc.)
• Motor sports section.
• Wider track in the front than on the back.
• Father of the G20 (nismo pres).
• Tuners Autech, Impul, Nismo, Stillen all have body kits.
• leak on a nissan engine is te vc gasket and the oil pressure sender most common.
• Teruo Uchino the designer of the 510 was the designer of the P10.