1. Replace the air filter with a high-flow filter. This will allow your engine to breathe more easily and produce more power.
2. Clean the throttle body. A dirty throttle body can restrict airflow and reduce power.
3. Install new spark plugs and wires. Old or worn-out spark plugs and wires can cause your engine to misfire and lose power.
4. Check the fuel filter. A clogged fuel filter can restrict fuel flow and reduce power.
5. Install a cold air intake. A cold air intake will allow your engine to breathe colder, denser air, which will produce more power.
6. Add a performance exhaust system. A performance exhaust system will help your engine breathe more efficiently and produce more power.
7. Re-jet the carburetor. If your Firebird has a carbureted engine, you can re-jet it to provide a richer fuel mixture, which will produce more power.
8. Install a shift kit. A shift kit will firm up your transmission's shifts and improve acceleration.
9. Change your rear axle ratio. A higher rear axle ratio will make your car accelerate more quickly, but it will also reduce your top speed.
10. Lighten your car. Removing unnecessary weight from your car will improve its acceleration.
These are just a few of the many ways to make your 91 Firebird faster without spending a lot of money. With a little effort, you can easily add some extra horsepower and torque to your car and enjoy even more fun behind the wheel.
