Why is the auto trans version derated so much? The loss of HP vs. Man. trans is pretty substantial. Are there mechanical differences engine wise? Also, are all model years(05') being upgraded with the flashes(N)? I own a 350Z but am trying to stay current on the 8 because my sister in law just got hers. Her husband and I enjoy our cars(cruising,mods) but he kinda relies on me to keep up with whats happening.
Hope this isn't in the wrong place....Thanks

 

You can use the search to check around the forum. there has been some talk on it.

the reason for the price and power difference is the fact that they are 2 different engines. both are 1.3L 2-rotors but the intake port system is different (4 port (auto) vs 6 port 9 (manual) i belive)

That is part of the cause of losing the HP and also why it doesnt rev as high.

The auto is a 4speed vs 6speed for the manual.

Its common for the auto version of a car to have slightly less HP and slightly more TQ for driveablity.

anyone else chime in.

 

Automatic transmissions rely on a device called a Torque Converter

http://auto.howstuffworks.com/torque-converter.htm

The problem is in making a torque converter than can handle 9000 rpms. So a more conventional unit is used and the engine is modified to produce fewer rpms. To compensate, the AT version of the Renesis develops more torque at lower rpms.