un-mufflered
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RE: un-mufflered
As long as the exhaust doesn't exit then get sucked back straight up. I think it's fine. Which is why I was asking if he still had kinda like stock piping, and some welded in place of the muffler, I think that'd be fine. But when the cut-off is only like 2 feet from the headers... not good. however, 12 feet or so, I believe is fine.
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Captain
Joined: Mar 2007
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RE: un-mufflered
first, I didn't cut any thing, I want to be able to put it back. The exhaust ends right after the cab. 6 or 7 feet or so. It still has one muffler/resonator. I don't hear any "bubbling" either. How do you know ifan aftermarket set up has enough backpressure? Do really long straight pipes work? how would one ever know? Are we to trust whatever our favorite exhaust dealer tells us? honestly curiuos.
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RE: un-mufflered
If you really wanted to test it you could take out one of your upstream O2 sensors and then plug in a backpressure test gauge. Warm the truck up to operating temp and take a reading at idle and at 2,500 RPM. You should be less than 8 kPa at idle and less than 20 kPa at 2,500 RPM. Then doadown stream O2 sensor and repeat the test.There is such thing as not enough back pressure which will eventually start messing up your exhaust valve seats. In your case though you have the cats and resonator which is more than enough backpressure for you not to worry about anything. However, I do recommend adding an extension and tailpipeto get the exhaust fumes away from the truck.
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Captain
Joined: Mar 2007
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RE: un-mufflered
yes, although i havent noticed any fumes, i know that's a good idea. Do you think a better flowing y pipe and a larger diameter single pipe would be safe, as far as back pressure goes?
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RE: un-mufflered
ORIGINAL: turbot_bird
the bubbling sound is the motor when it cuts fuel when you let off the gas, usually the muffler quiets down the sound pulses but without it you can hear them.
the bubbling sound is the motor when it cuts fuel when you let off the gas, usually the muffler quiets down the sound pulses but without it you can hear them.
Man did I love that!
ORIGINAL: rookie
yes, although i havent noticed any fumes, i know that's a good idea. Do you think a better flowing y pipe and a larger diameter single pipe would be safe, as far as back pressure goes?
yes, although i havent noticed any fumes, i know that's a good idea. Do you think a better flowing y pipe and a larger diameter single pipe would be safe, as far as back pressure goes?
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Joined: Dec 2005
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From: Winter Garden, Fl
RE: un-mufflered
ORIGINAL: Casper50
Oh and I love that sound. My Firebird did it when I was decelerating! Man did I love that!
You might not have noticed any fumes but you have to remember that you can't smellcarbon monoxide and that's the **** that will kill you. No, a better flowing "Y" pipe and larger single pipe won't hurt you so long as you keep some restriction in the exhaust like the cats. Even a 90 degree bend to go out to a tailpipe is a pretty large restriction. If you go as far as replacing the "Y" and single pipe you would have about the same amount of money in it as you would if you went with true duels with an "X" pipe though. I would go with the duels and just do it yourself since you are trying to save as much money as you can. You can get all of the piping at the auto parts store and then just clamp it all together. Then, if you don't have the means to weld it, take it to a shop and they will do it for pretty cheap. Just an idea though.
ORIGINAL: turbot_bird
the bubbling sound is the motor when it cuts fuel when you let off the gas, usually the muffler quiets down the sound pulses but without it you can hear them.
the bubbling sound is the motor when it cuts fuel when you let off the gas, usually the muffler quiets down the sound pulses but without it you can hear them.
Man did I love that!
ORIGINAL: rookie
yes, although i havent noticed any fumes, i know that's a good idea. Do you think a better flowing y pipe and a larger diameter single pipe would be safe, as far as back pressure goes?
yes, although i havent noticed any fumes, i know that's a good idea. Do you think a better flowing y pipe and a larger diameter single pipe would be safe, as far as back pressure goes?
Record Breaker
Joined: Feb 2005
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RE: un-mufflered
Not to mention mufflers are a required equipment and you can get a fine in ANY state whether they have inspection or not.
Wish I still had those pics of my bosses old Chevy after runnign it for a year with straight pipes from teh cat back. Exhaust valves are fun to replace,
Wish I still had those pics of my bosses old Chevy after runnign it for a year with straight pipes from teh cat back. Exhaust valves are fun to replace,