Cut the muff? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 08-16-2000, 12:46 PM
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Cut the muff?

I have a 96 gmc Z71 ext. cab. 350 vortec...Stock exhaust..i am planning to get flo masters in the next month or so, but for the time being i thought i might cut the pipe past the muffler, or cut the muffler completely off...my question is would either of these help my horsepower? hurt?


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post #2 of (permalink) Old 08-16-2000, 01:09 PM
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Re: Cut the muff?

Unless you want it to sound like a demolition derby car, I would recommend just keeping the stock muffler on for now. I also don't think you would gain any power by doing this as the newer factory exhausts are not really that restrictive.

6.2Blazer
post #3 of (permalink) Old 08-16-2000, 03:26 PM
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Re: Cut the muff?

You're not going to want to drive your truck with the exhaust pipes cut that short due to exhaust gasses entering in the cab (Harmful if you drive with the windows up). Breating exhaust gasses is the leading cause of people falling asleep at the wheel.

And, No, it won't give you any noticeable power gains unless your old exhaust is absolutely shot.

Nich Kenny
'89 K1500 350/700r4
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post #4 of (permalink) Old 08-16-2000, 07:28 PM
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Re: Cut the muff?

Okay, cutting the pipe will actually make you LOSE torque. Also, unless you like to attract attention of those with black and white cars, I would leave it alone until you get your new exhaust. I would get a single 3" pipe, and make it roughly the same length as the old one. Length of tailpipe can greatly help/ kill your torque.

Rhino

post #5 of (permalink) Old 08-16-2000, 11:05 PM
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Re: Cut the muff?

So your saying a longer pipe would give more torque?

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post #6 of (permalink) Old 08-17-2000, 08:07 PM
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Re: Cut the muff?


What I am saying is that unless you have a reasonable amount of pipe, you lose torque due to loss of backpressure. Why do you think diesels always run huge pipes, that are usually about 3' long? Size of the pipe has alot to do with it, but unless you have at least 18" beyond the muffler, You're gonna lose torque. I've learned this from my bad experiences with cutting pipes, mufflers, hacking exhausts, etc.


Rhino

post #7 of (permalink) Old 08-18-2000, 12:36 AM
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Re: Cut the muff?

well, i did it, i cut the pipe about 4 inches behind the muffler, so the brace closest to the muffler would steady the muffler. it has a very quiet mellow sound to it, nothing noticable. i cant tell any torque differance. my dad told me not to, but like all other 17 year olders, i didn't listen...i don't think it will hurt anything for a month or so...thanks for the replies though

post #8 of (permalink) Old 08-18-2000, 06:14 PM
 
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Re: Cut the muff?

If you were going to do it regardless of the answers you got here, then why did you even ask? Just curious...

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post #9 of (permalink) Old 08-18-2000, 06:16 PM
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Re: Cut the muff?

WELL, i planned on taking the advice, but then my friend did it and it sounded good, so i figured i would...is this ok with you?

post #10 of (permalink) Old 08-18-2000, 06:48 PM
 
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Re: Cut the muff?

Damn dude, I was just curious. Don't get your panties in a bunch![img]/wwwthreads_images/icons/laugh.gif[/img]

<font color=green>Evan</font color=green>[img]/wwwthreads_images/icons/crazy.gif[/img]

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