Replace Your Exhausts For More Oomph
A difference to your cars performance can be made by altering the exhaust system. Price normally comes into the equation when it comes to manufacturers making exhausts, so performance may suffer. The other thing is to make a standard exhaust system cheap and quiet it has to be fairly restrictive. More performance can be gained by putting a less restrictive type on.
Start by looking at the manifold section as your first port of call. The standard exhaust fitted to cars usually have sharp bends in them and are normally made from cast iron. The gas flow gets quite restricted because of the tight bends. An improvement in gas flow can be achieved by matching the cylinder heads to the exhausts ports. To get a good match, by matching up the ports using a small grinding stone on a drill can make a big difference. The performance is also determined by how the manifold is designed. Some of the better type designs are the four into two into one and the four into one.
The next step to check out the silencer section of the car. The normal silencers will tend to be pretty restrictive as they tend to push the gasses through a U-turn to get them through the silencer baffles to keep the car quiet. So buying a new one is not an unusual special birthday gift to buy for their cars. By fitting a straight bore exhaust silencer can help get rid of some of these restrictions.
You will have to be careful about going to large a bore as some back pressure is still required to help with performance. Losing all of the back pressure can actually lead to loosing power. Some of the back pressure is needed to pull the gasses from the engine, so having a tuned exhaust for the car is more beneficial. You will find that cars with no exhaust actually have no performance whatsoever. So if you are considering buying an exhaust as a present for him, make sure it is suited correctly for the car. You may have been in a position in the past where your exhaust has broken as you have been driving and you can tell how much power is suddenly lost.
Make sure that any new exhausts that are fitted, are still legal as they will tend to be sometimes louder than the original type. This loud noise can become fairly irritating if you use your car for many long journeys. however some people like the sound of these sporting exhausts. Fitting a new tubular manifold can offer more power gains. However when tuning exhausts in general, try to aim for more mid range power for road use.
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