Stupid Muffler Shop?
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Junior User
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Stupid Muffler Shop?
I went to a Meineke today to get my muffler cut off on my 302. I have a Flowmaster 40 series (single inlet/dual outlet). I also have had one of two cats taken off. It still isn't loud enough for me. Meineke told me that taking the muffler off would actually be quieter than the Flowmaster. This can't be right. Can it? They also told me that taking the Flowmaster off would rob me of gas mileage. Both of these things seem contrary to what I thought. Could someone please explain?
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Joined: Aug 2003
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From: Byhalia, MS
Personally, I would find an independent shop to do that kind of work. I tried so many chain stores when I went to get my exhaust done, and they all refused to do the work because of the emissions laws. I found myself an independent shop and they put straight pipes on it for less than $200, less than half of what the chains were quoting me.
As for the muffler, you can still find Cherry Bombs around here and there. A buddy of mine has 28" Bombs on his car, and the ground shakes when he revs it up.
As for the muffler, you can still find Cherry Bombs around here and there. A buddy of mine has 28" Bombs on his car, and the ground shakes when he revs it up.
Last edited by 666768F100owner; Jul 4, 2004 at 11:39 AM.
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From: Rio Rancho USA
Originally Posted by 78jpa
If i were you i would keep a muffler, it would give a better sound and also give you the back pressure you need.
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From: Winnipeg Canada
Originally Posted by bronconorwood
I went to a Meineke today to get my muffler cut off on my 302. I have a Flowmaster 40 series (single inlet/dual outlet). I also have had one of two cats taken off. It still isn't loud enough for me. Meineke told me that taking the muffler off would actually be quieter than the Flowmaster. This can't be right. Can it? They also told me that taking the Flowmaster off would rob me of gas mileage. Both of these things seem contrary to what I thought. Could someone please explain?
Is the motor on a good tune?
What size of exhaust?
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88 Bronco with a 302. Not sure about exhaust size. Pipe size is different going into the muffler and coming out.
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Elder User
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From: Winnipeg Canada
How can it not be loud enough? Probably not as loud as some 302's I've heard with 40 series but it should be pretty peppy. Is the motor stock or done up a little?
Is your motor bagged? Can you cut the other cat off? (Where I live cats are only needed on 96+ vehicles
)
Consider going to a true dual exhaust with some shorty headers and an H pipe?
Are you deaf?
Is your motor bagged? Can you cut the other cat off? (Where I live cats are only needed on 96+ vehicles
)Consider going to a true dual exhaust with some shorty headers and an H pipe?
Are you deaf?
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Butt-Head
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From: Reed Point, MT
Kens64:
You're absolutely correct. This is something myself and one of my friends have tried to elighten the world about for YEARS!!!
Backpressure is BAD. No matter what you have ('cept 2 cycle), backpressure is your enemy. Hence the fact that we run 3 inch duals on everything we've owned. You never realize the power difference until you change to a pipe that actually breathes. "kills your low-end".....BAH. Never once have I experienced that.....I've got a lot of experience, too. If your engine is not getting all of the exhaust out or having to work to push out what's spent in the cylinder, you're not making power.
Cody
You're absolutely correct. This is something myself and one of my friends have tried to elighten the world about for YEARS!!!
Backpressure is BAD. No matter what you have ('cept 2 cycle), backpressure is your enemy. Hence the fact that we run 3 inch duals on everything we've owned. You never realize the power difference until you change to a pipe that actually breathes. "kills your low-end".....BAH. Never once have I experienced that.....I've got a lot of experience, too. If your engine is not getting all of the exhaust out or having to work to push out what's spent in the cylinder, you're not making power.
Cody
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From: Saskatoon
The loudest you are going to get with the cats on is just straight piping. Keep in mind that thos mufflers are specially designed for performance and with them off you will lose a bit of performance, but not much. Putting cherry bombs or whatever on will restrict it even more and they are not that loud when the cats are on.
Like I said, cut the mufflers off and straight pipe it for noise.
Like I said, cut the mufflers off and straight pipe it for noise.
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Funny, i was just reading another thread "exhaust is too open, no torque", and this fella was complaining that he had lost his low end torque because his exhaust (3" dual) was too much. Perhaps, cleatus 12r, you have set up your trucks to handle 3" exhaust and if he had some restriction (i.e. backpressure) his truck would get back the power he lost.
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From: Rio Rancho USA
Nah, at worst, having such a free-flowing exhaust will not make you loose power, it will simply move some of the power a little further up in the powerband. Usually there is no change to low end power. Backpressure is not needed, but exhaust VELOCITY is a very good thing to have.
I read that post, and Im thinking there is something else wrong, and its not the exhaust. There is no way to get back lost power by choking the exhaust (backpressure).
I read that post, and Im thinking there is something else wrong, and its not the exhaust. There is no way to get back lost power by choking the exhaust (backpressure).
Posting Guru
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From: Prince George, B.C.
Doesn't lack of backpressure cause burnt valves? I have had that happen running dual 2.5" straight pipes turned out just behind the front tires on a car I had. Could have just been bound to happen anyway but seems to happen everytime I try huge exaust on anything, true dual 2.5" and glasspacks on a 1.6 4cyl (my lada niva) burnt valve and blew up the engine after about 4 hours of 4Xing.
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From: Rio Rancho USA
[QUOTE=351M]Doesn't lack of backpressure cause burnt valves? QUOTE]
Nope. But on a short exhaust like you had, the only thing that could happen is damage from shutting off the motor, and cold air rushing in to the hot valves. Could crack something that way. The air would have to be pretty cold, though.
Nope. But on a short exhaust like you had, the only thing that could happen is damage from shutting off the motor, and cold air rushing in to the hot valves. Could crack something that way. The air would have to be pretty cold, though.