Is a 3.5 exhaust too big?
The short answer is that a 3.5-inch exhaust is generally not too big, and can be a suitable choice for many vehicles. However, the appropriateness of the exhaust size depends on factors like the engine size, power output, and the intended use of the vehicle. In this article, we'll explore the considerations around choosing the right exhaust size.
Understanding Exhaust Sizing
The size of an exhaust system is primarily determined by the engine displacement and the desired performance goals. A larger exhaust diameter allows for better flow of exhaust gases, which can improve engine efficiency and power output. However, an exhaust that is too large for the engine can also have drawbacks, such as reduced low-end torque and potentially louder noise levels.
Factors to Consider
When determining if a 3.5-inch exhaust is appropriate, you should consider the following factors:
- Engine Size: Larger engines, such as V8s, typically benefit from a 3.5-inch or larger exhaust system to handle the increased exhaust flow. Smaller engines may be better suited for a 2.5-inch or 3-inch exhaust.
- Power Goals: If you're looking to maximize power and performance, a 3.5-inch exhaust can provide the necessary flow. However, if your goal is primarily improved fuel efficiency, a smaller exhaust may be more appropriate.
- Vehicle Type: Larger vehicles, such as trucks and SUVs, often use 3.5-inch or larger exhaust systems to match their engine size and power output. Smaller cars may be better suited for a 3-inch or even 2.5-inch exhaust.
- Noise Considerations: A 3.5-inch exhaust may produce a louder, more aggressive exhaust note compared to a smaller system. If you're looking for a quieter setup, a 3-inch or smaller exhaust may be a better choice.
Ultimately, the decision on exhaust size should be based on a combination of your vehicle's specifications, your performance goals, and your personal preferences.
Conclusion
In summary, a 3.5-inch exhaust is generally not too big and can be a suitable choice for many vehicles, especially those with larger engines or performance-oriented goals. However, it's important to consider the specific factors of your vehicle and your desired outcomes to ensure you choose the right exhaust size.
What size exhaust is best for power?
General Exhaust Tube Diameter Guidelines
| Power Level | Single Exhaust Diameter (OD) | True Dual Exhaust Tubing Diameter (OD) |
|---|---|---|
| Up to 250 HP | 3″ | — |
| Up to 300 HP | 3.5″ | — |
| Up to 425 HP | 4″ | 2.5″ |
| Up to 500 HP | — | 3″ |
Is 3.5 inch exhaust good?
It's simply deeper and way more menacing. With a better sound, more power and a quicker spool up, it's safe to say the move to 3.5-inch piping is a worthwhile modification to this Supra, and we'd expect it to help most other large turbo cars in this power range as well.
What size exhaust for 700 hp?
For 700 horsepower, a true dual exhaust with 3.5-inch pipes is recommended. A 3-inch dual exhaust can also be sufficient, especially if the system includes catalytic converters, but a 3.5-inch setup offers more potential for peak power and quicker spool-up.
Dual exhaust recommendations
- 3.5-inch dual exhaust: Recommended for power levels up to 700 HP and offers more benefits for peak performance. Some sources suggest a 3.5-inch system can handle up to 700 HP, while others state a dual 3-inch system is sufficient up to 500 HP. A 3.5-inch system can help gain power compared to a 3-inch system at this level, notes MotorTrend.
- 3-inch dual exhaust: A 3-inch dual system is generally suitable for engines making up to 500 HP, and for 700 HP, it's recommended to use a 3.5-inch dual system to reduce backpressure and gain power.
Factors to consider
- Engine type: The specific engine and its characteristics (e.g., naturally aspirated, turbocharged, or supercharged) will influence the ideal exhaust size.
- Exhaust system: The type of exhaust components, such as the headers, catalytic converters, and mufflers, will affect performance. For example, a full 3-inch exhaust without catalytic converters will allow for more flow than a system with converters.
- Desired outcome: If you prioritize peak power and quicker spool-up, a 3.5-inch system is the best choice. If you are more concerned with exhaust speed and torque, a 3-inch system may be sufficient.
What happens if your exhaust is too big?
This means that an extremely large exhaust pipe will actually cause SLOWER exhaust flow, and decreased performance.
