AN AWSOME EXHAUST THREAD MUST READ!!!!!!! /Thank You, And What Size Piping??

[usa1x]

THE AWSOME EXHAUST THREAD!!!!!
http://www.**************/modules.ph...wtopic&t=13850

i cannot get the link to work so im gonna cut a paste, but in know way do i take credit for any of this. It is due to "shailey" of club titan, and many others



Posted: Sat Mar 18, 2006 3:10 am Post subject: My exhaust findings!

I have received quite a number of PM's lately asking about exhaust. I do not mind them, in fact I enjoy helping people out and answering their questions. If you have questions after this post, still feel free to ask them, I will answer.

I know that there are many peole on here who know more about exhausts than I do as far as the technical stuff. But, in the last two months I have done around 40 dynos with many different combinations of modifications and exhausts. The systems that I have had include the following now:

1) Full Stock set-up with 22" magnaflow muffler
2) Magnaflow Catback
3) Gibson swept side
4) Borla Dual
5) Flowmaster 40 series
6) Flowmaster 70 series
7) JBA single exit

I will provide what I observed during the whole process to try and help others determine what is best for their needs. When I mention drone, I am extremely sensitive to the frequency that exhaust emits. So your level of hearing may be different than mine.

1) The full stock set up with the 22" magnaflow provided great numbers. The hp and torque increase from stock was 8 and 14. Sound was a little louder than stock and there was noticeable drone to me at 58 to 62 mph. Bang for your buck can not be beat here. Once again I ONLY changed out the muffler.

2) Maganflow catback single exit provided the best gain period with the STOCK titan. The numbers on the website of 18 and 22 were factual peak to peak numbers. Not a play on numbers like many manufacturers do and show how much you gained at a certain rpm when you actually gained on 2 or 3 peak horsies. One odd thing that needs to be realized with this set up is it uses the STOCK Y-PIPE. I tried this set up with a custom 3 1/2" Y-pipe and lost a lot of torque. drone once again, is pretty noticeable at speeds mentioned above.

3) Gibson Swept Side is in my opinion a great all around exhaust for a couple of reasons. One it does provide medium gains in hp and torque. But two it has a great sound with almost no drone. It is louder than stock at WOT, but at start up it is just a deep tone that sounds great. But if you want something that is loud and mean, this is not for you.

4) Borla dual. It sounds really good to me. Cruising speeds had no drone, drone was only around 45 mph. the gains in hp were comparable to the gibson (12), but the toque gain was very minimal. But it is a very clean sounding exhaust that will please MANY and the finished look is very nice.

5) Flowmaster 40 series did not stay on for an entire day. Drone felt like my head was going to cave in. I greatly apologize for not being able to tolerate it to give a full evaluation, but the drone was heavy between 40 and 70 mph to me. And that is where I drive 90 percent of the time.

6) Flowmaster 70 series. Very good sound. Not to loud, drone was minimal around 1600 rpms. Provided nice hp gains that were equivalent to Gibosn and Borla, but once again the torque gain was very minimal. This exhaust at wot was definitely able to turn some heads with its volume and I did notice a couple of pops after going WOT and then letting completely off the gas. So it performs like the Gibson and Borla but has a little more agressive sound than both of them.

7) The JBA provided the best gains AFTER the header install. I do not have perforamnce numbers with the stock exhaust manifold, because I purchased this system AFTER headers. Previously the Magnaflow had the top gains hands down, but after the headers, this one etched out on top by 4 hp and 6 pounds of torque. I think that JBA did a good job matching their systems up. One thing that is interesting though is the muffler that came with it was a K & N muffler. The Y-pipe is smaller than ALL OTHER catback systems at 2.5"...EXCEPT where the bend in the tubing is and at the Y. The bend in the tubing on the drivers side expands to a little under 3" and then shrinks back down and it seems to act like a velocity channel. And the Y has two 2.5" pipes that come together to a 3" collector. There is some drone at 1600 rpms does not matter the speed, but it is definitely tolerable to me. This is a fairly loud agressive exhaust but is still not up with the Flowmasters or Bnaks.

So one conclusion that I was able to come to is that the 5.6 loves back pressure. That is where the low end torque comes from as does the max torque. It is funny that the 3 systems that produced the best numbers (hp and torque) used the smallest diameter Y-pipe and 2 of those were with the STOCK Y-PIPE and the other has the same diamter as the stock y-pipe. The dual systems lost speed in the lower range (below 40 mph) and I am convinced that is because of the minimal torque gains and I believe loss of back pressure. So if you want pure sound, the duals are the way to go. But if you want performance, the single exits with the smaller Y-pipe proved to be the best.

I will also be installing and dynoing the bassani system soon. I know that they are big into vette's, but I heard one on a friends Z06 and it had a great sound and provided pretty good gains on his vette.

Now please do not start writing in and bashing me because of my findings. All of this was done on the dyno and the on road findings were times with a Bel FX2 and my ears. Times can be affected by humidity, temperature and wind.
_________________
'05 Crew Cab SE 4x2, DVD, JBA Ceramic Titanium Headers, JBA Exhaust, Speed Engineering ECM Tuning, Volant CAI w/Ram Air Scoop, Poweraid TBS, Front Tint, Michelin Cross Terrain SUV, Superior Leaf Spring Helper/Clamp Kit







first off i just want to say thank you to all you guys on coming to my rescue on my questions. with the exhaust system and sus. etc....

my last question was about what system to get.

i've taken the advice off everyone and found a great exhaust and muffler shop near by my house, to do a custom system with mangnaflow, borla or what ever for the muff.

but based on what that guy found from that other thread ive been thinking if you do a true dual system, or even something that doesnt have enought back pressure you lose the awsome low-end torq.
so im wondering what piping size to use and if true dual is ok, or if i should do y-pipe/ 3-inch pipe, like the magnaflow, jba type set-up.

One of the shops around here susggest mabey a true dual set up with 2.25in piping. i kinda think he was guessing thow.


Whats do you guys and your infanite knowledge have to say???

also what about advanceing timing 2*???

love low-end tq, and a new louder and better soundtrack would be nice

[sudden urge]

So much for the many posts that say the biggest restriction is the stock 2.5" y connector, dyno says that isn't so.

[pi3yeargrad]

this has been posted before thanks anyway

[P's Titan]

Originally Posted by pi3yeargrad

this has been posted before thanks anyway

wonder why the old timers always say to " do a search"

[TitanicDJ]

Originally Posted by P's Titan

wonder why the old timers always say to " do a search"

Yeah but the newbees get so excited....

Hey, where's the Loud as Hell review, BANKS?

DJ

[tillery444]

This sounds good to me! I think I've mentioned before that I thought the blowmaster Y pipe was mostly hype and that the magnaflow was a solid system.

[Chris03hd]

Never saw this info posted before, thanks for sharing.

[Toomnymods]

I bet the Banks would fare very well also, Shailey said most of the exhaust systems which had a Y pipe and had similar size piping to stock did very well on his truck, he told me he didnt test the banks cause he had no intrest of putting such a loud exhaust on his truck.. I love mine drone and all, can't see how people complain about exhaust drone.. I'ts like putting in a 6,000 stereo system and complaining cause thier is too much clarity, bass etc..

[MO Titan]

I have always said if you are stopping after exhaust and CAI don't pay for the y pipe replacement systems. If you are going farther like headers and /or SC you have to replace the cats and y-pipe sooner or later.

[FlimFlamMan]

Originally Posted by Toomnymods

I bet the Banks would fare very well also, Shailey said most of the exhaust systems which had a Y pipe and had similar size piping to stock did very well on his truck, he told me he didnt test the banks cause he had no intrest of putting such a loud exhaust on his truck.. I love mine drone and all, can't see how people complain about exhaust drone.. I'ts like putting in a 6,000 stereo system and complaining cause thier is too much clarity, bass etc..

The Banks does fair very well (combined with an Intake). Here is my dyno sheet comparing my stock dyno vs the Banks and Injen mod dyno. These dyno's were done back in Feb. I reset the ECU, drove for a few days and then did the mod dyno.

Then I did another dyno just last week. No ECU resets since the mod installs. Still using 87 octane. Same dyno machine... same operator. Results are nearly identical.

The gains were very good, imo. Folks with other Banks/Intake combo's have shown even higher gains.

Did I lose some low end torque? Yes... but not much. (also... most everyone runs rich after mods).
Can it be corrected with a tune/programmer/chip? I'm pretty sure it can. Time will tell.

Long story short... Banks is a good exhaust mod (combined with an intake), IMO. And its LOUD!

[Titan1219]

Originally Posted by sudden urge

So much for the many posts that say the biggest restriction is the stock 2.5" y connector, dyno says that isn't so.

I think you might be jumping the gun. Removing the y-pipe restriction just might be the biggest restriction, but it might not yield the most gains by taking it out. some restriction is good.

I was impressed that a simple muffler swap gave a solid 8 hp and 14 tq.

[goathead]

what would be the difference in the first two scenarios? if they are both single exit, and the cat-back system uses the stock y-pipe then the cat-back has to use a different muffler than the 22" mentioned in the first test. the factory exhaust is 3" dia. am i wrong in this thinking? why would there be such a difference in gains?

[goathead]

pulled this from another thread/post....

Originally Posted by Tim Sloper

The last point I'd like to make relates to the notion of low-end loss of torque with aftermarket exhaust systems. When it comes to anything past the manifolds/cats you will NOT lose low end torque with a free flowing catback setup. I don't know why that notion keeps comming up but unfortunately it does. If you could lock the torque converter and do a before/after dyno run across the entire RPM band you would not see a loss of low end torque. If you did it would purely be due to the air/fuel calibration not being optimum for the new setup not because a free flowing catback inherently causes you to lose anything at the lower RPM band. Header sizing is a different area that can have an impact on torque output but at this point in time it is not something the Titan community has to worry about. Backpressure in an exhaust system is BAD.

Tim

what do you think about this thought? i shortened the response to the area of question/concearn. here is a link to the original thread w/ responses so that it doesnt appear that im taking things out of context

what size piping for custom exhaust

[Titan1219]

Originally Posted by goathead

what would be the difference in the first two scenarios? if they are both single exit, and the cat-back system uses the stock y-pipe then the cat-back has to use a different muffler than the 22" mentioned in the first test. the factory exhaust is 3" dia. am i wrong in this thinking? why would there be such a difference in gains?

they could use the same muffler, just have improved piping, mandrel bends, etc...over the stock pipes.

[sudden urge]

The factory piping is 2.5", not 3". The onlt part that is 3" is the last short piece, the tail pipe.