Since it's introduction in 1982, the Nissan Sentra has stood out from other compact economy cars as a result of the availability of performance engine options from the factory. While the engine in the original SE-R Sentra performance model produced an impressive 140 horsepower, the current SE-R engine produces 200hp. Despite the impressive output from the current SE-R engine, it is possible to get more horsepower from all Sentra engines including the SE-R by modifying the vehicle's exhaust, air intake and engine management systems.
Replace the factory air box with an aftermarket cold-air intake designed to increase the flow of cold air into the engine. The increase in the amount of cold air flowing into the engine allows for a level of performance that is impossible to achieve with the restrictive factory air-intake system in place. Cold-air intakes designed specifically for the Nissan Sentra are widely available and do not require professional installation.
Modify the Sentra's engine management software by adding a chip to the vehicle's electronic control unit or having the unit reprogrammed by a professional tuning company. Changes to the software that controls the engine's functions will result in more aggressive, performance oriented function from the engine as the software will be tweaked for all out performance with no concern for fuel economy. As the electronic control unit is an extremely expensive and sensitive piece of equipment, it is best that any modifications be done by a professional in order to minimize the chance of damage to the unit.
Remove the entire factory exhaust system and replace it with a performance focused system produced specifically for the Sentra. The larger diameter and more free-flowing exhaust system will not only lead to noticeable performance gains but will also give the vehicle the added benefit of a more aggressive exhaust note. As a vehicle lift and welding equipment is required for installation it is best for a professional to handle the installation process.
