What are the symptoms of a bad exhaust pressure control valve?
Usually a problem with the exhaust pressure control valve will produce a few symptoms that can alert the driver of a potential issue. One of the first symptoms of a problem with the exhaust pressure valve is engine performance issues. If the valve becomes stuck or blocked it can affect engine performance.
Why do I need to lower the exhaust pressure on my motorcycle?
Due to EPA regulations often times getting your bike to sound like a Harley means you need to make it louder. A common belief is that by reducing back pressure in the exhaust system you will automatically gain horsepower. Unfortunately this is not the case.
Why does Evo increase the exhaust back pressure?
According to Ref. [97], if EVO is timed close to BDC of expansion, it could significantly increase cylinder pressure during the first part of the exhaust stroke, increasing pumping work. Early EVO decreases the effective expansion ratio of the engine, which lowers thermal efficiency.
Why does my exhaust pipe keep backfiring on my motorcycle?
Short pipes, also known as a shorty, are usually 12 inches or less in length and are intended to give a motorcycle a cleaner look and a little louder exhaust. This is simply too short and will often cause backfiring.
Usually a problem with the exhaust pressure control valve will produce a few symptoms that can alert the driver of a potential issue. One of the first symptoms of a problem with the exhaust pressure valve is engine performance issues. If the valve becomes stuck or blocked it can affect engine performance.
How does rarefaction work in the exhaust system?
Also, when a pressure wave traveling in a pipe reaches the open end (or a chamber, like a cat converter or resonator) a rarefaction (negative pressure) wave is created and travels back in the other direction. At low engine speeds these waves can travel up and down the exhaust system several times on each stroke.
Where to put a tunable baffle in an exhaust pipe?
STEP 2: Drill a 1/4″ hole about 1″ inside your head pipe where your aftermarket exhaust slip on. STEP 3: Take the tunable baffle and place a 1/4″ nut and a lock washer (away from the large washer). Now insert your tunable baffle into the exhaust pipe like the example below.
Due to EPA regulations often times getting your bike to sound like a Harley means you need to make it louder. A common belief is that by reducing back pressure in the exhaust system you will automatically gain horsepower. Unfortunately this is not the case.