bennifits of running no cat

[b16bri]

Whats the bennifits or down side of running a cat on a turbo civic vs not running a cat. Sound ? power ?

[Schister66]

Emissions?

[igorka_91]

google dot com. have you heard about it lately?

What Are the Benefits of Removing the Catalytic Converters From Cars?



Catalytic converters, which are responsible for igniting and burning unburned engine exhaust gases, became standard automotive equipment on all cars beginning with model year 1975. Although catalytic converters help to make engine exhaust gases cleaner, they are not without their minuses. What follows is a brief list of the potential benefits of removing automotive catalytic converters.

Increased Horsepower
Cars that have their catalytic converters removed experience an increase in engine horsepower. Catalytic converters create a significant source of engine back-pressure due to the constrictive effects they have on exiting engine exhaust gases. Removal of catalytic converters from cars allows exhaust gases to exit their engines much faster and at higher levels.

Better Gas Mileage
Since catalytic converter removal allows for exhaust gases to exit a car's engine at increased speeds, engine back-pressure is reduced, which lessens engine strain. This reduction in engine back-pressure and engine strain enables an engine to work more easily, and thus reduces fuel consumption and increases gas mileage.

Lower Engine Operating Temperature
Since removing a catalytic converter lessens the burden on a car's engine by enabling engine exhaust to vacate the engine more easily, a net effect is a reduction in engine operating temperature. The more easily an engine functions and the less work it has to do results in less friction, less load and, ultimately, a lower operating temperature.

More Fuel Options
Cars equipped with catalytic converters run only on unleaded gasoline. Lead-based gasoline, which produces more power and better engine combustion, quickly destroys the inner catalyst materials of catalytic converters. A car with no catalytic converter will be able to run on a variety of lead-based and/or high-performance fuels that would not be possible with a catalytic converter.

Healthier Exhaust Sound
Catalytic converters operate like car mufflers, whose sole purpose is to muffle the sound of exiting engine exhaust gases. Although catalytic converters burn unburned exhaust gases exiting an engine, thus making tail pipe emissions cleaner, they also further muffle a car's exhaust sound and bestow a somewhat timid, tempered exhaust sound. Without a catalytic converter, a car's exhaust sound becomes a little louder, a little deeper and more distinctive.

5 seconds to look it up.

[crispchris]

if this is your daily driver i'd strongly recommend against it. You can find good prices on high flow cats that should give you very similar performance gains over the stock cat

[b16bri]

it's not my daily. and on my last set up i had a high flow cat. I was just wondering if the sound would change and how much more horsepower yould be gained running no cat.

[pcguy760]

I barely noticed a whp gain when I installed a high flow cat. It did make the car sound deeper and louder though..