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Showing posts with label Dual Exhaust. Show all posts
Showing posts with label Dual Exhaust. Show all posts

Friday 2 October 2015

Do Exhaust Tips Improve Sound?

Do Exhaust Tips Improve Sound?




Whether exhaust tips alone can change the sound of a car depends largely on the components used. Going from a 1.5-inch diameter tip to a 4-inch tip can make the exhaust note deeper but far less so than simply buying a new muffler. There are a number of factors to take into consideration, such as intended effects, budget and additional modifications.

Buying Factors
Though the main part of the exhaust note is determined by the mufflers, resonators, catalytic converter and pipe diameter, there are a few factors that affect sound at the tip. Tip size actually has very little to do with sound, unless you go to a much larger or smaller diameter. Smaller diameter pipe will restrict the engine, slowing the exhaust stream and decreasing engine noise, and a larger diameter tip will make the engine louder only if the original tip was a restriction.

Down-turned tips, particularly those that dump underneath the car, can deepen the exhaust note by bouncing sound off the ground and using the undercarriage as a resonator. The ground will absorb much of the annoying high-frequency sound from smaller displacement engines.

The only way to significantly affect exhaust register is with a tunable tip, such as those manufactured by SuperTrapp. These tips (originally designed for ATVs and dirt bikes) use conical or disc-shaped inserts to both alter the wavelength characteristics of the escaping exhaust and suppress the flames emitted by very short exhaust systems. These tips allow the user to tune the exhaust note slightly by inserting or removing disc spacers that act as a secondary muffler. This is the most effective option for exhaust note tuning, but considering the fact that they cost 10 times what the average tip does, it may be cheaper to just purchase a new muffler.

Length
On applications where it is possible to do so, like motorcycles and ATVs, lengthening the pipe by as little as 6 inches can drastically affect exhaust note. Doing so gives high frequency waves more opportunity to cancel out, allowing the long, low frequency waves to escape.

Installation
When installing tips with any kind of kick-out, try experimenting with the position before you settle on one. Tips designed for round tubing can easily be rotated by loosening the retaining screws and turning them. As stated, many engines sound better with down-turned tips, but try rotating the tips so they face outward, upward, and even inward to see what it sounds like.

After each adjustment, walk around the car while a friend revs the engine.

Turned-out tips will be much louder from the sides, and inward turned tips will move the sound dispersion further back so that it's only really loud when one is standing next to the rear bumper. If you desire an increase or decrease in sound, try rotating the tips so that they're at a 45-degree angle to the ground.



How to Remove an Exhaust Resonator

How to Remove an Exhaust Resonator


An exhaust resonator on a car acts like a preliminary muffler. It mounts after the catalytic converter, and silences the exhaust an extra step before the muffler. Some people like this, but others prefer the sound of a vehicle with a bit more exhaust rumble. For them, one option is to remove the exhaust resonator from the system, which will make the exhaust louder in the process. This should take around an hour to do.

Things You'll Need
Jack
Jack stands
Tire iron
Reciprocating saw
Metal reciprocating saw blades
Gloves
Eye protection
Hearing protection



Instructions
Lift the vehicle up with the jack and put it onto a set of jack stands. Make sure there is enough room underneath the vehicle for you to work with the reciprocating saw.

Locate the exhaust resonator, which is mounted after the catalytic converter, and is typically just before the muffler. Put on your eye and hearing protection, as well as the gloves.

Put the metal reciprocating saw blade into the reciprocating saw. Cut the exhaust pipe 2 inches forward of the resonator and 2 inches rearward of the resonator with the reciprocating saw. Take the resonator out from underneath the vehicle.