Camshafts

From Nissan 350Z & 370Z Wiki

Stock Camshaft Specs

• NOTE: Intake/Exhaust duration is in degrees ( ° ) Lift is listed in mm.
• VQ35DE: 238° (Intake) and 240° (Exhaust) w/ 9.2 mm lift.
• VQ35DER: ---° (Intake) and ---° (Exhaust) w/ --- mm lift.
• VQ35HR: ---° (Intake) and ---° (Exhaust) w/ --- mm lift.

Available camshafts

Amuse List: $1980 Intake: 280° - 11mm Exhaust: 260° - 10.5mm Notes: (List reflects included ROM Tune, Rom Tune Japan only)	Central 20 List:$1115.00 Intake:２６４° - 10.2mm Exhaust:２６４° - 0.2mm Notes: See Z Sport	Esprit List: $1299.00 Intake: 270° - 10.5mm Exhaust: 270° - 10.5mm	HKS Camshafts.jpg HKS 'List: Intake: Exhaust: Notes: IN DEVELOPMENT
Impul Camshaft.jpg Impul List: $2,068 Intake: 256° Exhaust: 256°	JWT List: $1,019 Intake: 260° - 10.9mm Exhaust: 260° - 10.9mm	Mines Camshaft.jpg Mines List: Intake: 256° - 10.8mm Exhaust: 264° - 11.5mm	Nismo R Spec List: $1299.00 Intake: 262° Exhaust: 256° Lift: .426"
Nismo Spec 1 List: $1499.00 Intake: 276° Exhaust: 256°	Nismo Spec 2 List: $2499.00 Intake: 284° Exhaust: 268°	Tomei List: $1115.00 - $1375 per set of 4 Intake: 256/264° - 10.2mm & 268° - 10.5mm Exhaust: 256/264° - 10.2mm & 268° - 10.5mm Notes: 264/268° require upgraded springs and some lifters will need adjusted	Z Sport List: $1115.00 Intake: 264° - 10.2mm Exhaust: 264° - 10.2mm

About Camshafts

The camshaft uses lobes (called cams) that push against the valves to open them as the camshaft rotates; springs on the valves return them to their closed position. This is a critical job, and can have a great impact on an engine's performance at different speeds

The advantages of chains and belts are light weight, the ability to separate the two gears by some distance, and the ability to connect many gears together on the same chain or belt. For example, in a car engine, the same toothed belt might engage the crankshaft, two camshafts and the alternator. If you had to use gears in place of the belt, it would be a lot harder.

Most modern engines have what are called overhead cams. This means that the camshaft is located above the valves. The cams on the shaft activate the valves directly or through a very short linkage. Older engines used a camshaft located in the sump near the crankshaft. Rods linked the cam below to valve lifters above the valves. This approach has more moving parts and also causes more lag between the cam's activation of the valve and the valve's subsequent motion. A timing belt or timing chain links the crankshaft to the camshaft so that the valves are in sync with the pistons. The camshaft is geared to turn at one-half the rate of the crankshaft. Many high-performance engines have four valves per cylinder (two for intake, two for exhaust), and this arrangement requires two camshafts per bank of cylinders, hence the phrase "dual overhead cams."