What component(s) of the exhaust system are responsible for creating the back pressure. Is it the cats,mufflers,diameter of piping or is it something unseen? I‘m wanting to put some mufflers on my car ( flowmasters or thrush ) and I was told that if too much of the back pressure is relieved it would cause problems. My car is a ‘94 fleetwood with the LT1 engine by the way,
No you may't. whilst the piston rises and creates a favorable rigidity wave in the process the exhaust cycle the wave (exhaust gas) passes down the exhaust pipe. whilst the wave reaches the tip of the pipe, and exits, there's a resultant damaging rigidity wave that traverses back to the engine. whilst an exhaust device is designed the dimensions and diameter of the pipe are careful
The whole exhaust system creates the back pressure . On some vehicles , it doesn't harm the car , but it might not run as good . On an LT1 engine , Flowmasters will actually help as they like to breath . By the way , check out the new redesigned Cherry Bombs .
Well, every item in the exhaust system contributes to back pressure. Imagine breathing through a straw. It is easy if the straw is completely straight with no kinks or bends. Now imagine your pinching the center of the straw with your fingers and trying to breath through it. It gets more difficult. That is pretty much what the exhaust system is like on your car. The catalytic converter creates an obstruction to that free breathing. So does the resonator on the vehicle and the mufflers. Also, the piping is not mandrel bent (true diameter throughout the piping) from the factory so that adds to the breathing difficulty. Now, the flowmaster mufflers you want to put on your vehicle won't badly affect backpressure. Flowmasters actually don't flow well at all. They flow slightly more air than factory mufflers but their design (2 or 3 sound chambers that give it that flowmaster sound) are not the optimal design for relieving back pressure. Straight through mufflers offer bigger power gains because the exhaust flow pretty much flows right through them and they use fiberglass wrapping around the straight through design to muffle the sound instead of sound deadening chambers. You may feel a slight decrease in low rpm ooomph and slightly more power in the medium to higher rpms of that LT1 engine. The sound will be much better though and it isn't a bad investment if you like the flowmaster sound.
