1g Non-turbo DSMs (1990-1994 Mitsubishi Eclipses and Eagle Talons) can be modified for decent performance gains. However, if you're looking for the performance levels of the turbocharged 1G, many will agree that it will likely be less hassle and more cost efficient to simply purchase a factory turbocharged 1G.

For more questions and 1g Non-Turbo discussions, visit our Non-turbo Forum.

alt1
Tuning Guide : 1g Non-Turbo Cars
Non-turbo DSMs that were built from 1990-94 with the DOHC 2.0 liter 4G63 power plant came with 130hp on tap. These motors have higher compression pistons than the turbocharged models, and actually react pretty well to aftermarket mods - it's too bad there aren't more mods for them. To get more performance out of these cars, we've outlined a few possiblities below. Of course, some mods may not adhere to various vehicle emissions laws, so perform at your own risk.
All-Motor Upgrades
  1. Air Intake
    Replace the stock air box with a solid pipe and high-flow cone filter.

  2. Cat-back Exhaust
    Replace the stock cat-back exhaust with a higher flowing model.

  3. High Flow Cat
    Replace the stock catalytic converter with a higher flowing model.

  4. Exhaust Header
    Replace the factory exhaust manifold with a tubular steel header.
Forced Induction Options
  1. Turbo Installation
    Since the motor is basically the same layout as the turbocharged 4G63, it is possible to bolt up factory turbo parts from another car. However, with the higher compression, it won't be possible to turn up the boost enough to gain huge amounts of power. Obviously, the compression can be lowered, but it may just be cheaper and less labor intensive to go out and purchase a factory turbocharged DSM.

  2. Nitrous
    The fastest and easiest way to bolt on big power. It's also the fastest and easiest way to destroy your engine if you don't know what you're doing. Read up on nitrous systems before considering one.

  3. Turbo Engine Swap
    This project is extremely time consuming, complex and expensive due to the amount of parts needed to perform the task. The parts alone can range upwards of $5000. The basic parts needed are: Engine, transmission, ECU, intercooler (and piping), fuel pump, complete exhaust system, and possibly a few more things not mentioned. The two options above are definitely better choices for the less experienced. Consider the cost of simply buying a factory turbocharged DSM before attempting this swap.