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Old 02-29-2008, 12:06 AM
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Default General knowladge. Altima 07+

I will add more. this is all i can recall now

1.Coupe and Sedan Differences
the only parts shared externallty between both cars is the hood. thus the tails, bumper, grille and all that wont fit

However both models share the exact same power plants as each other

2. Side mirrors
the 3.5SE comes with mirrors with lights. they can be installed on a 2.5, its just a plug and play

3. Fogs

All 3.5SE's and all Canadian models are prewired for fogs. so if you have a U.S. spec 2.5 and wish to add fog lights you must do a custom wiring, or you can have the dealer do factory wiring but its not cost effective

4. factory wheels
base 2.5 - 16" steel wheels with 215/60/16 continental ProContact
2.5s with premium, and 2.5SL and 3.5SL - 16" aluminum alloy wheels with 215/60/16 continental ProContact
Sedan 3.5SE - 17" 5 spoke aluminum alloy with 215/55/17 Bridgestone Turanza
Coupe 3.5SE - 17" multi spoke aluminum alloy with 215/55/17 Bridgestone Turanza

Factory Offset on all wheels are +45mm
bolt pattern 5x114.3

5. CVT
the CVT is unlike your Standard Automatic Transmission that is loaded with gears and what not, CVTs only have three basic components:

* A high-power metal or rubber belt
* A variable-input "driving" pulley
* An output "driven" pulley

^That is a picture of a Nissan CVT
CVTs also have various microprocessors and sensors, but the three components described above are the key elements that enable the technology to work. The variable-diameter pulleys are the heart of a CVT. Each pulley is made of two 20-degree cones facing each other. A belt rides in the groove between the two cones called V-belts. V-belts get their name from the fact that the belts bear a V-shaped cross section, which increases the frictional grip of the belt.

When the two cones of the pulley are far apart (when the diameter increases), the belt rides lower in the groove, and the radius of the belt loop going around the pulley gets smaller. When the cones are close together (when the diameter decreases), the belt rides higher in the groove, and the radius of the belt loop going around the pulley gets larger. CVTs may use hydraulic pressure, centrifugal force or spring tension to create the force necessary to adjust the pulley halves.

Variable-diameter pulleys must always come in pairs. One of the pulleys, known as the drive pulley (or driving pulley), is connected to the crankshaft of the engine. The driving pulley is also called the input pulley because it's where the energy from the engine enters the transmission. The second pulley is called the driven pulley because the first pulley is turning it. As an output pulley, the driven pulley transfers energy to the driveshaft.

The distance between the center of the pulleys to where the belt makes contact in the groove is known as the pitch radius. When the pulleys are far apart, the belt rides lower and the pitch radius decreases. When the pulleys are close together, the belt rides higher and the pitch radius increases. The ratio of the pitch radius on the driving pulley to the pitch radius on the driven pulley determines the gear. as seen in the figure bellow

When one pulley increases its radius, the other decreases its radius to keep the belt tight. As the two pulleys change their radii relative to one another, they create an infinite number of gear ratios -- from low to high and everything in between. For example, when the pitch radius is small on the driving pulley and large on the driven pulley, then the rotational speed of the driven pulley decreases, resulting in a lower “gear.” When the pitch radius is large on the driving pulley and small on the driven pulley, then the rotational speed of the driven pulley increases, resulting in a higher “gear.” Thus, in theory, a CVT has an infinite number of "gears" that it can run through at any time, at any engine or vehicle speed.

The simplicity and stepless nature of CVTs make them an ideal transmission for a variety of machines and devices, not just cars. CVTs have been used for years in power tools and drill presses. They've also been used in a variety of vehicles, including tractors, snowmobiles and motor scooters. In all of these applications, the transmissions have relied on high-density rubber belts, which can slip and stretch, thereby reducing their efficiency.

The introduction of new materials makes CVTs even more reliable and efficient. One of the most important advances has been the design and development of metal belts to connect the pulleys. These flexible belts are composed of several (typically nine or 12) thin bands of steel that hold together high-strength, bow-tie-shaped pieces of metal.

For more info there is also a video about CVT that is helpfull

Last edited by QR; 02-29-2008 at 01:46 PM.
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Old 04-26-2008, 01:38 PM
Join Date: Apr 2008
Location: Canada
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Hi there. I am looking for either a clear or chrome bug deflector for my 2007 Nissan Altima. Does such a thing exist?
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Old 05-05-2008, 10:49 PM
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That sounds pretty gay. I hope it doesnt!!
2008 Altima 2.5SL CVT - Dark Slate - Black Leather 8000k HID Kit

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