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gotjeepzj
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I'm wondering if adjusting the mixture to lean it out would correct the mileage?
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dtkid said:Yes but some cam-overlap occurs. If there were no overlap and exhaust valves were completely closed during the intake phase your assumption would be correct. But I believe that all machines possess some cam-overlap and therefore the pressure waiting at the exhaust manifold would indeed affect mix delivery.
Rake78GS said:Well after reading this thread, and hearing everyones opionion. I decided to REMOVE my muffler. The entire thing from behind the 4-1 collector.
YES it is VERY loud. I expect a complaint from my land lord any time now......
And YES it DOES have a DEEPER sound to it Ever head a 5.0L Mustang with headers and a free flowing exhaust..........
Does it effect the balance of the engine? Cant say 100% because I havent checked the plugs as yet
BUT!
It DOES INCREASE fuel consumption! My fuel usage has DOUBLED on the same run as I have always done!
Does it increase HP or Torque? Cant guarantee due to lack of a Dyno tester in my living room.........
BUT the ole '78 pulls HARDER and revs FASTER than ever before.
Considering the INCREASED fuel flow, and the INCREASED rev I HAVE to assume it WOULD effect the balance of EVERYTHING else!
gotjeepzj said:I'm wondering if adjusting the mixture to lean it out would correct the mileage?
mixongw said:I hated the sound from the meg. I purchased a 3A Racing muffler ($131) and it mated right up to the header. The sound is much better. Very low note but not loud.
http://www.3aracing.com/showroom/pro...452e7a1ce2b861
Detman101 said:Not sure on that one. I figure that the engine is using that amount of fuel because it needs it with the exhaust off. Leaning out the mixture would damage things I figure.
When I took my muffler off I went up one size in main jets to compensate JUST IN CASE.
....I had a feeling something was going to lean out once I took off the muffler and didn't want to take any chances till I could put the can back on.
how can i order one of them? thanksHiSPL said:
I have to disagree with you. I have a MAC 4-1 with a removable baffle. I removed it and the sound spectrum that is now there is about two octaves lower than with it in. Thing sounds like a V-8 now!AOD said:Cutting the baffles out or driling holes in your exhaust will NOT make the engine sound deeper. It will do the opposite, actually. The baffeling and muffler packing is what deepens the tone of the engine.
I honestly think you are going the wrong way.
~Adam
khansmith said:I have to disagree with you. I have a MAC 4-1 with a removable baffle. I removed it and the sound spectrum that is now there is about two octaves lower than with it in. Thing sounds like a V-8 now!
gotjeepzj said:Are you running anything or just open pipe? Have you noticed any extra fuel consumption.
mrT said:As the saying goes "If it's too loud, you're too old"
I personally ride for fun and not social acceptance...
flyingace said:Check out how fast jet skis are disappearing from public waterways. Why? - because they don't ride for social acceptance either.
khansmith said:I have to disagree with you. I have a MAC 4-1 with a removable baffle. I removed it and the sound spectrum that is now there is about two octaves lower than with it in. Thing sounds like a V-8 now!
The MAC 4-1 comes with this removeable baffle as a functional option. The baffle has one retaining screw at the end of the megaphone. I removed the megaphone and the retaining screw. I then took a 3 inch wooden dowel and slid the megaphone over teh dowel so I could push from the inside of the megaphone. Came right out with a couple whacks. If you have ever used a pole driver to put stakes into the ground, it was a similar action; the megaphone was the driver over the dowel.Detman101 said:How did you remove the baffle. As much as I've tried I cannot get the baffle out! The only way I could run without the muffler was to take the can all the way off. I would love to hear my bike without the baffle and It would help to verify the "fuel-consumption" issue we have all been experimenting with.
Please tell me how you got the baffle out. I tried tapping it out from the other end of the can and that didn't work. I also pulled on it with vise-grips from the exiting side of the muffler can and that didn't work either...
Help please. I don't want to tear the thing up trying to get the baffle out.
Detman101 said:How did you remove the baffle. As much as I've tried I cannot get the baffle out! The only way I could run without the muffler was to take the can all the way off. I would love to hear my bike without the baffle and It would help to verify the "fuel-consumption" issue we have all been experimenting with.
Please tell me how you got the baffle out. I tried tapping it out from the other end of the can and that didn't work. I also pulled on it with vise-grips from the exiting side of the muffler can and that didn't work either...
Help please. I don't want to tear the thing up trying to get the baffle out.
khansmith said:The MAC 4-1 comes with this removeable baffle as a functional option. The baffle has one retaining screw at the end of the megaphone. I removed the megaphone and the retaining screw. I then took a 3 inch wooden dowel and slid the megaphone over teh dowel so I could push from the inside of the megaphone. Came right out with a couple whacks. If you have ever used a pole driver to put stakes into the ground, it was a similar action; the megaphone was the driver over the dowel.