PORSCHE BOXSTER 2005 2.G Owners Manual

Vehicle Identification, Technical Data
261
Transmission Boxster
Boxster S Gear ratios5-speed
manual transmission6-speed
manual transmissionTiptronic S
1st gear 3.50 : 1 3.67 : 1 3.66 : 1
2nd gear 2.12 : 1 2.05 : 1 2.00 : 1
3rd gear 1.43 : 1 1.41 : 1 1.41 : 1
4th gear 1.09 : 1 1.13 : 1 1.00 : 1
5th gear 0.84 : 1 0.97 : 1 0.74 : 1
6th gear0.82 : 1
Reverse 3.44 : 1 3.33 : 1 4.10 : 1
Final drive ratio 3.75 : 1 3.875 : 1 4.379 : 1
Gear ratios6-speed
manual transmissionTiptronic S
1st gear 3.67 : 1 3.66 : 1
2nd gear 2.05 : 1 2.00 : 1
3rd gear 1.41 : 1 1.41 : 1
4th gear 1.13 : 1 1.00 : 1
5th gear 0.97 : 1 0.74 : 1
6th gear 0.82 : 1
Reverse 3.33 : 1 4.10 : 1
Final drive ratio 3.875 : 1 3.908 : 1

262
Vehicle Identification, Technical Data
Tires, Rims, Tracks Boxster Tires Rim Rim offset Track
Summer tiresfront 205/55 ZR 17 91Y 6.5 J x 17 H2 55 mm 58.7 in./1490 mm
rear * 235/50 ZR 17 91Y 8 J x 17 H2 40 mm 60.4 in./1534 mm
or front 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 18 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46 mm 60.0 in./1522 mm
Snow tiresfront 205/55 R 17 91V M+S 6.5 J x 17 H2 55 mm 58.7 in./1490 mm
rear * 235/50 R 17 96V M+S 8 J x 17 H2 40 mm 60.4 in./1534 mm
or front 235/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “V”) are minimum requirements.

Vehicle Identification, Technical Data
263
fWhen changing tires or fitting new ones: Please observe the chapter “WHEEL BOLTS” on Page 222.
Danger!
Installation of sizes not authorized by
Porsche may have a dangerous effect on
the driving stability and could result in
severe personal injury or death.
fBefore mounting new tires, check with yourPorsche dealer about the current release status. Boxster S Tires Rim Rim offset Track
Summer tiresfront 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y XL 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 19 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46+ mm 60.0 in./1522 mm
Snow tiresfront 255/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “Y”) are minimum requirements.
Tire and rim sizes
Extensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has information
about approved tires and wheels and is happy to assist you. If aftermarket tires and/or wheels are installed which are not
approved by Porsche, the vehicle’s roadability and handling characteristics might be impaired. Since Porsche has no data on
such combinations, Porsche cannot stand behind the safety or durability of these aftermarket combinations.
* Snow chains Can be mounted only on the rear wheels; maximum speed 30 mph/50 km/h. Use only Porsche authorized fine-link
cross-type or edge chains. Snow chain clearance can be guaranteed only with the tire + rim combination marked.

264
Vehicle Identification, Technical Data
Tire pressure for cold tires fThese tire pressures apply only to the tire makes and types approved by Porsche.
Please observe the chapter “WHEEL BOLTS” on Page 222. Summer and snow tires
17 inch wheels front 29 psi (2.0 bar)
rear 36 psi (2.5 bar)
18 inch wheels front 29 psi (2.0 bar)
rear 36 psi (2.5 bar)
19 inch wheels front 32 psi (2.2 bar)
rear 36 psi (2.5 bar)

Vehicle Identification, Technical Data
265
Driving Performance* * At DIN empty weight and half load, without performance-inhibiting extra equipment. Boxster Manual transmission Tiptronic S
Maximum speed
5-speed transmission
6-speed transmission159 mph/256 km/h
160 mph/258 km/h155 mph/250 km/h
Acceleration 0 – 60 mph 5.9 seconds 6.8 seconds
Acceleration 0 – 100 km/h (62 mph) 6.2 seconds 7.1 seconds
Boxster S Manual transmission Tiptronic S
Maximum speed 167 mph/268 km/h 162 mph/260 km/h
Acceleration 0 – 60 mph 5.2 seconds 6.0 seconds
Acceleration 0 – 100 km/h (62 mph) 5.5 seconds 6.3 seconds

266
Vehicle Identification, Technical Data
Capacities Use only fluids and fuels authorized by Porsche. Your authorized Porsche dealer will gladly advise you.
Your Porsche has been designed so that it is not necessary to mix any additives with oils or fuels.
EngineOil change quantity without oil filter approx. 1.98 U.S.gallons/7.5liters
Oil change quantity with oil filter approx. 2.05 U.S.gallons/7.75 liters
Please observe the chapter “ENGINE OIL RECOMMENDATION” on Page 174.
Coolant Boxster
Manual transmission: approx. 5.86 U.S. gallons/22.2 liters
Tiptronic S: approx. 6.37 U.S. gallons/24.1 liters
Boxster S
Manual transmission: approx. 5.94 U.S. gallons/22.5 liters
Tiptronic S: approx. 6.42 U.S. gallons/24.3 liters
Manual transmission and differential 5-speed: approx. 2.4 quarts/2.25 liters, 6-speed: approx. 3 quarts/2.8 liters
Tiptronic Sapprox. 2.51 U.S. gallons/9.5 liters
Differential with Tiptronic Sapprox. 0.21 U.S. gallons/0.8 liters
Power steeringapprox. 1.1 quarts/1 liter hydraulic fluid Pentosin CHF 11 S
®
Brake fluidapprox. 0.4 quarts/0.39 liters; use only Original Porsche brake fluid
Windshield washerapprox. 0.66 U.S. gallons/2.5 liters without headlight washer
approx. 1.59 U.S. gallons/6 liters with headlight washer
Fuel tankRefill volume approx. 16.9 U.S. gallons/64 liters, including approx. 2.6 U.S.gallons/10 liters reserve.
Fuel qualityYour engine is designed to provide optimum performance and fuel economy using unleaded premium fuel with
an octane rating of 98 RON (93 CLC or AKI).
Porsche therefore recommends the use of these fuels in your vehicle.
Porsche also recognizes that these fuels may not always be available. Be assured that your vehicle will operate
properly on unleaded premium fuels with octane numbers of at least 95 RON (90 CLC or AKI), since the engine’s
“Electronic Oktane™ knock control” will adapt the ignition timing, if necessary.

Vehicle Identification, Technical Data
267
Weights
Dimensions Boxster Manual transmission Tiptronic S
Empty weight (depending on equipment) 2855 lbs. to 3109 lbs. 2987 lbs. to 3208 lbs.
1295 kg to 1410 kg 1355 kg to 1455 kg
Maximum gross weight 3549 lbs./1610 kg 3649 lbs./1655 kg
Maximum axle load, front* 1709 lbs./775 kg 1709 lbs./775 kg
Maximum axle load, rear* 2017 lbs./915 kg 2017 lbs./915 kg
Boxster S Manual transmission Tiptronic S
Empty weight (depending on equipment) 2965 lbs. to 3153 lbs. 3053 lbs. to 3241 lbs.
1345 kg to 1430 kg 1385 kg to 1470 kg
Maximum gross weight 3594 lbs./1630 kg 3682 lbs./1670 kg
Maximum axle load, front* 1709 lbs./775 kg 1709 lbs./775 kg
Maximum axle load, rear* 2072 lbs./940 kg 2072 lbs./940 kg
*The maximum gross weight must not be exceeded.
Note: If additional accessories are installed, the useful load will be correspondingly less.
PAS M
Length 170.4 in./4329 mm
Width 70.9 in./1801 mm
Height 51.0 in./1295 mm 51.0 in./1295 mm
Wheelbase 95.1 in./2415 mm
Ground clearance 4.0 in./101 mm 3.7 in./95 mm
Turning circle 36.4 ft./11.1 m

268Diagrams Acceleration diagram
Values have been determined at DIN empty
weight and with a 50 % load without
additional equipment.
Transmission diagram
The transmission diagram is based on
standard values on the basis of a mean
effective scrub radius. Changes of the scrub
radius, the tire tolerance, wear and tear,
deviating country equipment and tire slip
have not been taken into account.
Boxster S: Engine diagram at full power

269
Boxster: Engine diagram at full power

270Boxster: Acceleration diagram
Manual transmission