i am looking to up grade my exhaust and intake but like most after market exhaust systems are very loud. i am looking for something moderate that isn't irritating to ride in. but something that also sound good.. any suggestions....
also something that will provide enough back pressure so the valves wont burn. and something that will keep the engine light off for the O2 sensors.
Nothing sounds better than a magnaflow cat-back......if you buying of the shelve.
whats this back pressure BS you speak of?
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
i would agree with magnaflow.........and what is this back pressure? does it help you get off the line??=) like a cannon??
after reading up on the whole back pressure theory i found that back pressure is actually not that good for an engine. but it is on the other hand NOT a myth as everyone keeps telling me. but however the reason why most ppl have problems with valve burning after having intake or exhaust work done is because of a very lean-burning engine. In order to achieve a theoretical optimal combustion, an engine needs 14.7 parts of oxygen by mass to 1 part of gasoline (again, by mass). This is referred to as a stochiometric (chemically correct) mixture, and is commonly referred to as a 14.7:1 mix. If an engine burns with less oxygen present (13:1, 12:1, etc...), it is said to run rich. Conversely, if the engine runs with more oxygen present (16:1, 17:1, etc...), it is said to run lean. Today's engines are designed to run at 14.7:1 for normally cruising, with rich mixtures on acceleration or warm-up, and lean mixtures while decelerating.
LMT is that the car is breathing better causing a increase in oxygen which then needs to be matched with a different fuel curve to match the change in mixture..
The thinking of backpressure creates horsepower is a myth. Back pressure itself is very common on all engine, but you want to reduce it.
Nathan Leach wrote:after reading up on the whole back pressure theory i found that back pressure is actually not that good for an engine. but it is on the other hand NOT a myth as everyone keeps telling me. but however the reason why most ppl have problems with valve burning after having intake or exhaust work done is because of a very lean-burning engine. In order to achieve a theoretical optimal combustion, an engine needs 14.7 parts of oxygen by mass to 1 part of gasoline (again, by mass). This is referred to as a stochiometric (chemically correct) mixture, and is commonly referred to as a 14.7:1 mix. If an engine burns with less oxygen present (13:1, 12:1, etc...), it is said to run rich. Conversely, if the engine runs with more oxygen present (16:1, 17:1, etc...), it is said to run lean. Today's engines are designed to run at 14.7:1 for normally cruising, with rich mixtures on acceleration or warm-up, and lean mixtures while decelerating.
LMT is that the car is breathing better causing a increase in oxygen which then needs to be matched with a different fuel curve to match the change in mixture..
Haha thanks, we know, but you do know that the ecu compensates for this right?
