Question about exhaust mods

[pirates712]

I've been lurking around here for awhile, reading threads about exhaust kits reducing low end torque. How bad is this loss? Is it extremely noticeable? Most of my driving is in the 1-2k rpm range, with rpm's up to 3k when accelerating. How bad is torque loss in this range? Also, fuel economy is more important to me than power, so would there be any fuel economy gain/ loss here? I've also heard that it is better just to get a new muffler for a better (louder) sound, but haven't been able to find a muffler that wasn't part of a kit for my Tundra. Also, I'm considering the Edelbrock single exhaust kit because it's a good brand and cheaper than both magnaflow and banks. Anyone have any expirience with this brand?

[GORILLA]

hi, just change the muffler to whatever sound you like.
if you want it to be loud buy the smallest kind of muffler you choose.
do yourself a big favor, & save yourself alot of money. just by buying the muffler.

if you like the dual tail pipes than add those. you will not, loss anything major.
HP gain from exhaust on from cat back are anywhere beteen zero gain to 5hp.
don't think there will be a big loss in torque. there isn't.
as far as i know,
i have yet to see a dyno of proof from a tundra showing the dyno of that specific tundra,
& when he/she changed the muffler, the guy/girl re-dyno'ed and showed a loss.
again this is 1 of these thing's many have said here :
IT FEEL'S LIKE A LOSS IN TORQUE.
well let's call it like we see it. if any one has the proof of a dyno, post it.
and even than it could be a different truck, other mods, 3" pipes or larger.
so to make a long story short.
as long as you don't put huge 3" or larger exhaust pipes on you will be just fine.
gorilla

[pirates712]

Alright, but all of the kits I've seen come w/ 3" pipes. Are there any that don't?

[pirates712]

Wait, never mind. Anyone tried Gibson's kit?

[NHtoyman]

Originally Posted by pirates712

I've been lurking around here for awhile, reading threads about exhaust kits reducing low end torque. How bad is this loss? Is it extremely noticeable? Most of my driving is in the 1-2k rpm range, with rpm's up to 3k when accelerating. How bad is torque loss in this range? Also, fuel economy is more important to me than power, so would there be any fuel economy gain/ loss here? I've also heard that it is better just to get a new muffler for a better (louder) sound, but haven't been able to find a muffler that wasn't part of a kit for my Tundra. Also, I'm considering the Edelbrock single exhaust kit because it's a good brand and cheaper than both magnaflow and banks. Anyone have any expirience with this brand?

Here is a good sound file that I found. I am doing the same set up. I have the muffler, but need it welded in. Hopefully soon

Here yeah go Nice Sound Vid of 14 magnaflow

[pirates712]

Alright, It's between the Gibson and the Edelbrock. I would like to go with the Gibson because it has a smaller pipe diameter, so from what I've read, that should result in a lesser loss of low end power. Any thoughts on this?

[Scorp979]

I had a Gibson Cat back dual side swept exhaust on for a few years. Loved the sound, got lots of complements. No real noticeable change in performance. The only thing I can say is if you live in an area prone to the elements get stainless. My Gibson kit was not and it only lasted 4 seasons.

[2000tundra2wd]

i highly reccomend finding a muffler of your choice that you like the sound of and have it welded in. for a raspy sound, i would go with a flowmaster. for a deep and tight sound, go for a magnaflow. glasspacks are just obnoxious. i have a 14 inch magnaflow with the resonator removed, and a turndown and its perfect for me.

[pirates712]

What about torque loss for a 2.5 pipe vs a 3"? Any difference in fuel economy?

[Sizematters75]

Originally Posted by 2000tundra2wd

i highly reccomend finding a muffler of your choice that you like the sound of and have it welded in. for a raspy sound, i would go with a flowmaster. for a deep and tight sound, go for a magnaflow. glasspacks are just obnoxious. i have a 14 inch magnaflow with the resonator removed, and a turndown and its perfect for me.

Are you serious. I can tell you have null experience with exhaust and just want to throw out what your personal opinion is and make it sound like it is factual matter. Flowmaster makes many different mufflers for many different applications and not one of them sound the same. Magnaflow is the same way just depending on what application you choose is what sound you will get. Glasspacks may be obnoxious to you but some others may love it. Not to mention there are many other facts that can change the sound of exhaust (ie. pipe size, how many bends after and at what degree, tip size and style of tip). We understand that Flowmaster takes a lot of hit from the Tundra community but still again I have ran Flowmaster on every vehicle from a V6 to a Big Block V-8 and have always found a good application that sounded good to my likings.

To the OP,
Going from 2.5" to 3" will change sound for one and the amount of back pressure which is the big problem with these 4.7's, I would stay with 2.5" if you can. If I can give you any advice and that is to stay away from the exhaust kits. They are way over prices and most of the time are not even stainless. Like a poster above me said they will not last. Browse the internet find a sound you like and go to a muffler shop and get them to weld the muffler in. If you want duels then get a single in dual out and get them to run the pipes. It will come a lot cheaper for the same effect and will last you a lot longer.

[2000tundra2wd]

Originally Posted by Sizematters75

Are you serious. I can tell you have null experience with exhaust and just want to throw out what your personal opinion is and make it sound like it is factual matter.

i don't know man...

these are the different exhaust set-up's my V8 tundra been through

stock
stock muffler removed with just resonator
flowmaster 40 series turndowns with resonator
flowmaster 40 series turndowns without resonator
stock muffler with removed resonator
straight pipes
straight pipes with 20 inch glasspack
magnaflow 14 inch single turndown after muffler with resonator
magnaflow 14 inch single turndown after muffler without resonator
magnaflow 14 inch single turndown over the axle with resonator
magnaflow 14 inch single turndown over the axle without resonator


...i have null experience.

Sizematters75, i hope you like my signature.

[Sizematters75]

Originally Posted by 2000tundra2wd

i don't know man...

these are the different exhaust set-up's my V8 tundra been through

stock
stock muffler removed with just resonator
flowmaster 40 series turndowns with resonator
flowmaster 40 series turndowns without resonator
stock muffler with removed resonator
straight pipes
straight pipes with 20 inch glasspack
magnaflow 14 inch single turndown after muffler with resonator
magnaflow 14 inch single turndown after muffler without resonator
magnaflow 14 inch single turndown over the axle with resonator
magnaflow 14 inch single turndown over the axle without resonator


...i have null experience.

Sizematters75, i hope you like my signature.

Well here is the problem I see with this. you are a running a 40 Series muffler on a small V8. Why not get a gook tube from Skunk2 and put it on there. The muffler is extremely small in comparison to many others and with very few baffles. If you go to Flowmasters website and look at any of the 40 series they say nothing or recommends a 40 series muffler on a pickup truck much less a pickup truck with a small V8.The only thing I would put a 40 series on would be a big block or a built up small block. Then you add on top of that turn downs which makes exhaust sound even louder and raspy. No wonder you hated the sound of a flowmaster.
Just curious but if the Magnaflow is the choice of muffler then why did you have to go through 4 different scenarios to find one you are happy with.

[pirates712]

Originally Posted by pirates712

I've been lurking around here for awhile, reading threads about exhaust kits reducing low end torque. How bad is this loss? Is it extremely noticeable? Most of my driving is in the 1-2k rpm range, with rpm's up to 3k when accelerating. How bad is torque loss in this range? Also, fuel economy is more important to me than power, so would there be any fuel economy gain/ loss here? I've also heard that it is better just to get a new muffler for a better (louder) sound, but haven't been able to find a muffler that wasn't part of a kit for my Tundra. Also, I'm considering the Edelbrock single exhaust kit because it's a good brand and cheaper than both magnaflow and banks. Anyone have any expirience with this brand?

I didn't notice my "rank" in the forum- "lurking member"- lol

[2000tundra2wd]

Originally Posted by Sizematters75

Just curious but if the Magnaflow is the choice of muffler then why did you have to go through 4 different scenarios to find one you are happy with.

think about what you just said. i didn't automatically know that the magnaflow would sound the best. if i would have known that, i would have saved a few dollars. i had to try things out, and i was happy with none until i came across the magnaflow. i thought i would like the flowmaster, i didn't. i thought i would like the glasspack, i didn't. magnaflow, i did like. so its on there now and staying for a while.

[KNABORES]

So...... for some useful info for the original poster. Have a reputable shop do your exhaust system with quality stainless or aluminized piping of close to original stock diameter. Choose muffler of your liking. Common statements are that Magnaflow and Flowmaster are well liked. Gibson has had many in-cab resonance sound issues at cruising speed causing an unpleasant "drone". I believe there is some sort of part that Gibson offers to reduce this ( which means its a legitimate problem ). Not sure about the Edelbrock kit. Kits are generally in the 5-600 dollar or more range, plus install. A quality system from local shop, custom fitted and bent for your vehicle will run anywhere from 300-500 depending on setup and usually is backed by the shop installing. Good Luck.