Stage
1 - up to 30% more horsepower
These
are the recommended upgrades for a daily driven car. These
will give a strong solid improvement without needing a replacement
of the computer but would benefit from some fuel mods.
- 55mm
or 60mm throttle body
- Stage
1 camshaft
- Four
into one headers
- 2 -
1/4" exhaust system
- Rising
fuel pressure regulator set to 45psi at idle
- Fitment
of K&N Filtercharger (part number KN57-1500)
- Adjustable
Cam Gear (Not essential but recommended)
This will make it a much nicer car and will work within the
limits of the standard computer settings. Any bigger on any
of the items will take it beyond that point and lose drivability.
These should have a 1.5 near 125HP and a 1.8 near 140HP (at
the flywheel).
Stage
2 - up to 40% more horsepower
Stage
1 plus the following: With the fitment of say a Apexi
S-AFC controller or equivalent air/fuel controller,
then you can upgrade to the stage 2 cam, and valve springs.
A 60mm or 65mm throttle body would also be a good upgrade. A tranmission cooler is recommended
for automatic transmission owners and a restalled torque converter will give you more powerful launches.
An underdrive pulley would also gain you a few more
horsepower. These additional upgrades should have a
1.5 near 140HP and a 1.8 near 155HP (at
the flywheel).
Beyond
Stage 2
For 5-speed owners, a lightened flywheel and better
clutch would also help. Automatic transmission owners should switch to synthetic fluid with one bottle of Lubegard "black" added instead of the OEM fluid. Internal engine parts can be upgraded, such
as pistons and connecting rods and there are many additional
upgrades that can be performed. Don't forget to check
out the turbo and quad
throttle body systems if you want more power than
the stage 2 option! You will eventually overtax the
fuel pump and fuel injectors. Keep this in mind when
you reach the end of stage 2 and beyond. You can also
check out RPW's
site for more upgrade ideas.
