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| Removing the muffler on a KK http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=88&t=81744 |
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| Author: | PALiftedKK [ Fri Apr 03, 2015 10:22 am ] |
| Post subject: | Removing the muffler on a KK |
I've only seen this been done on a crd, but not on a KK. im interested on removing the muffler and keeping the resonator to keep things some what quiet. im wondering from all of your past experience if doing this will gain any improvement in horse power and or torque asswell as being more "green" with gas. also, any foreseeable CEL with this after the ecu is reset? this mod has potential to cost under $30. EDIT: and keeping in mind that I have the 4.7l TB with 2.80 id intake. |
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| Author: | tommudd [ Fri Apr 03, 2015 11:01 am ] |
| Post subject: | Re: Removing the muffler on a KK |
Making more " noise" is about all that it will do. A muffler that flows better helps a very small amount in overall running ( HP and torque) and mileage and it will not be more " green"  4 wheel and off road or one of those mags did a test a few years back on a KJ result was only a couple more HP and one or two lbs of torque, not even enough to worry about If you have 30 bucks to spend, put it towards something that actually helps |
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| Author: | PALiftedKK [ Fri Apr 03, 2015 11:09 am ] |
| Post subject: | Re: Removing the muffler on a KK |
tommudd wrote: If you have 30 bucks to spend, put it towards something that actually helps 5 days worth of gas... if im lucky |
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| Author: | tjkj2002 [ Fri Apr 03, 2015 11:19 am ] |
| Post subject: | Re: Removing the muffler on a KK |
PALiftedKK wrote: tommudd wrote: If you have 30 bucks to spend, put it towards something that actually helps 5 days worth of gas... if im lucky $30 is 2 days for my Jeep. |
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| Author: | PALiftedKK [ Fri Apr 03, 2015 11:26 am ] |
| Post subject: | Re: Removing the muffler on a KK |
I guess im the pavement princess in this topic then... |
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| Author: | tjkj2002 [ Fri Apr 03, 2015 11:36 am ] |
| Post subject: | Re: Removing the muffler on a KK |
PALiftedKK wrote: I guess im the pavement princess in this topic then... You will not gain any torque,you will actually loose low end torque thus making you use more gas. |
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| Author: | Scar0 [ Sat Apr 04, 2015 12:52 am ] |
| Post subject: | Re: Removing the muffler on a KK |
I have to agree. No real gains and even possible losses. Most rigs now days require the "scavenging effect" to assist in getting the exhaust out. With to little resistance, the exhaust gas velocity can drop to the point of eliminating the benefits of the scavenging effect. By doing what you are thinking about, you may reduce the scavenging effect of the exhaust pulses, actually causing a negative effect on your HP and mileage. This is the reason a true dual exhaust(or running with no muffler) is not recommended on these small/high RPM engines. The "scavenging effect" is when the previous exhaust pulse helps to suck out the next exhaust pulse. If you were to run WOT all the time, the "scavenging effect" would not be an issue(as in racing). If you are racing then your mileage doesn't matter much anyway. 
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