With cars becoming affordable and reliable, more people are taking the bold move of modifying it in ways. While some people just look for minor cosmetic mods, some go for a bit serious performance boost. We totally understand the joy of getting a bit more power from your everyday ride and performance exhausts are a good option to achieve that. They allow the engine to breathe freely and generate a couple more horses while giving you an aural treat. While it is easy to replace the exhaust system, there are a lot of things that you should keep in mind before you go ahead with such a job.
When you add a performance exhaust to your vehicle, you will end up with a void warranty in most cases. So first you have to decide if the modification is worth losing your warranty over. If your vehicle is already out of its warranty period then you won’t have to worry about this bit. The other thing is that changing the exhaust would put some more strain on your engine. So it is not advisable to do this until your car has done some highway trips and has already been serviced a couple of times. We are not allowed to temper with the catalytic convertor on the car so unless you are making something for track use only, the easiest way to replace the exhaust is getting a cat back exhaust. A cat back exhaust replaces the exhaust system after the catalytic convertor to obtain better performance. This would give you a smooth free revving engine. Here are a couple of things you should consider when you go ahead with the exhaust change.
Dimensions of Exhaust
Generally a rule is followed for the volume of mufflers. It should be at least five times the engine capacity or there is no point replacing it. So if you are putting it on a 1.5 litre engine, make sure it has a volume of at least 7.5 litres in overall capacity. This would ensure that the flow of exhaust gases is smooth and the exhaust valves aren’t strained.
The diameter of pipes should also be larger than the stock pipes to ease the flow of gases. See if the exhaust pipes have a diameter about 30-40 percent larger than the stock pipes. However you should avoid very large exhaust tips as they tend to look out of place on small cars and don’t really offer any advantage.
If you have decided to fabricate an exhaust for your car, make sure you use the best quality of steel pipes available. They should be seamless so that the flow of gases is as smooth as possible. You can also choose to use stainless steel pipes. It would offer better performance as compared to steel pipes. This is because stainless steel won’t react with the gases easily and it would also last longer for this reason. However it would be more difficult to fabricate one in stainless steel as its welding is tougher than steel. Try to keep the number of bends minimum as they would just add to the resistance for the gas flow. The bends that have to be added should be very smooth so that they don’t disrupt the flow because excessive back pressure could damage the engine. Before you finally weld and seam the muffler bodies, make sure that you stuff as much glass wool stuffing as possible.
Don’t Just Replace the Exhaust
Well you should follow this tip if you are looking to make the most out of your performance exhaust. There is no denying the fact that a performance exhaust would give you minor bump in performance but you can make more out of it by making a couple more changes. With a performance exhaust, you are allowing the air to flow out easily. You can also replace the stock air filter on your car for a better one so that more air flows in the system. If the new setup is causing drop in power at high engine speeds, it is possible that the engine is running at bit lean. A minor ECU tweak would set things right and make it a perfect performance package. You will notice an immediate improvement in the acceleration and throttle response of the vehicle.