exhaust experiments

[07 firecrew]

1. removed the resonator from stock exhaust, along with the charcoal filter; no change in performance, just a little deeper sound at lower speeds.

2. purchased flowmaster 70 series, single 3'' out, my immediate thought after about four days, was the drone and lack of power compared to stock. this muffler incerted in place of the factory muffler, using the stock tail pipe i thought it would be close to stock performance, it was not and this was an error on my part, blame it on lack of knowledge. the flowmaster guys o me that i needed to run the muffler in ( miles) then the tone would change some, along with the ecu adjustments. back to stock.

3. purchased the zoomers, no need to experiment here, a little too rhowdy for a 57yo. had i installed a resonator behind the muffler, it may have toned down some but there is some drone in the zoomers, although it did perform well, item was returned.

4. purchased the JBA, rightoff i felt the need to tone it down, low end was less. so i installed my left over resonator behind the JBA muffler, since i had an old zoomers tip from nissan titan, i installed it also. it sounded really nice, but just was not pulling atleast at stock levels, to me. drove it atlanta, pulled a 5k lbs trailer back, not loud at all, cruising at 70 to 75 you could barely hear it, only the up hill you mainly here it, because of downshifts. still not satisfied with performance, but the sound was near perfect, due to my alterations, sold it to a guy in houston. back to stock.

5. still is just to quiet for such a powerful engine, so i reinstalled my flowmaster, but this time i install a resonator (aero-turbine-AR-25) behind it using stock tail pipe. the reason for the 2.5'' resonator, was to reduce noise and speedup gases that were slown down by the 3'' muffler outlet, jackpot' the ECU started adjusting right off the bat, the low end response was there from the start, and it still adjusting itself. now i'm content. when i crank this baby up, mainly when cold, i just stand outside and listen and smile.
ther is no drone anywhere. 60mph cruising is like the factory system without the resonator, but on steriods, 70mph is the same but a little quieter.
bottomline, i love it, my ECU likes what i have done.
my major expense was the flowmaster muffler. i think if you are going to solve aftermarket exhaust problems, you have to think outside the box. hope this journey helps someone.

[jegallimore]

Can you give us the run-down of exactly what you have on your truck now. How much did it end up costing for the modifcations you made to the exhaust? Also if you could post some pictures, and maybe a sound clip that would be great. I'm looking for the best option for improved performance, sound, and hopefully increased fuel economy by adding a CAI and improved exhaust.

[Cycleman6]

Were you satisfied with the performance of the Zoomers? Know you didn't like drone, but performance wise, which performs better, Zoomers or your Flow with resonator? I like the sound of Zoomers, that doesn't bother me, but I want maxiumum performance. I'm installing the Zoomers with DT headers.

[c5vette]

So did the ZOOMERS lose any low end torque etc? tx

[RudyDep]

Originally Posted by 07 firecrew

1. removed the resonator from stock exhaust, along with the charcoal filter; no change in performance, just a little deeper sound at lower speeds.

2. purchased flowmaster 70 series, single 3'' out, my immediate thought after about four days, was the drone and lack of power compared to stock. this muffler incerted in place of the factory muffler, using the stock tail pipe i thought it would be close to stock performance, it was not and this was an error on my part, blame it on lack of knowledge. the flowmaster guys o me that i needed to run the muffler in ( miles) then the tone would change some, along with the ecu adjustments. back to stock.

3. purchased the zoomers, no need to experiment here, a little too rhowdy for a 57yo. had i installed a resonator behind the muffler, it may have toned down some but there is some drone in the zoomers, although it did perform well, item was returned.

4. purchased the JBA, rightoff i felt the need to tone it down, low end was less. so i installed my left over resonator behind the JBA muffler, since i had an old zoomers tip from nissan titan, i installed it also. it sounded really nice, but just was not pulling atleast at stock levels, to me. drove it atlanta, pulled a 5k lbs trailer back, not loud at all, cruising at 70 to 75 you could barely here it, only the up hill you mainly here it, because of downshifts. still not satisfied with performance, but the sound was near perfect, due to my alterations, sold it to a guy in houston. back to stock.

5. still is just to quiet for such a powerful engine, so i reinstalled my flowmaster, but this time i install a resonator (aero-turbine-AR-25) behind it using stock tail pipe. the reason for the 2.5'' resonator, was to reduce noise and speedup gases that were slown down by the 3'' muffler outlet, jackpot' the ECU started adjusting right off the bat, the low end response was there from the start, and it still adjusting itself. now i'm content. when i crank this baby up, mainly when cold, i just stand outside and listen and smile.
ther is no drone anywhere. 60mph cruising is like the factory system without the resonator, but on steriods, 70mph is the same but a little quieter.
bottomline, i love it, my ECU likes what i have done.
my major expense was the flowmaster muffler. i think if you are going to solve aftermarket exhaust problems, you have to think outside the box. hope this journey helps someone.

Hey wasnt that detour around 10 there in La horrid? I went 61 miles out of my way due that fire. It Sooooooooooooo Sucked.
Rudy

[blackbeauty]

Originally Posted by 07 firecrew

1. removed the resonator from stock exhaust, along with the charcoal filter; no change in performance, just a little deeper sound at lower speeds.

2. purchased flowmaster 70 series, single 3'' out, my immediate thought after about four days, was the drone and lack of power compared to stock. this muffler incerted in place of the factory muffler, using the stock tail pipe i thought it would be close to stock performance, it was not and this was an error on my part, blame it on lack of knowledge. the flowmaster guys o me that i needed to run the muffler in ( miles) then the tone would change some, along with the ecu adjustments. back to stock.

3. purchased the zoomers, no need to experiment here, a little too rhowdy for a 57yo. had i installed a resonator behind the muffler, it may have toned down some but there is some drone in the zoomers, although it did perform well, item was returned.

4. purchased the JBA, rightoff i felt the need to tone it down, low end was less. so i installed my left over resonator behind the JBA muffler, since i had an old zoomers tip from nissan titan, i installed it also. it sounded really nice, but just was not pulling atleast at stock levels, to me. drove it atlanta, pulled a 5k lbs trailer back, not loud at all, cruising at 70 to 75 you could barely here it, only the up hill you mainly here it, because of downshifts. still not satisfied with performance, but the sound was near perfect, due to my alterations, sold it to a guy in houston. back to stock.

5. still is just to quiet for such a powerful engine, so i reinstalled my flowmaster, but this time i install a resonator (aero-turbine-AR-25) behind it using stock tail pipe. the reason for the 2.5'' resonator, was to reduce noise and speedup gases that were slown down by the 3'' muffler outlet, jackpot' the ECU started adjusting right off the bat, the low end response was there from the start, and it still adjusting itself. now i'm content. when i crank this baby up, mainly when cold, i just stand outside and listen and smile.
ther is no drone anywhere. 60mph cruising is like the factory system without the resonator, but on steriods, 70mph is the same but a little quieter.
bottomline, i love it, my ECU likes what i have done.
my major expense was the flowmaster muffler. i think if you are going to solve aftermarket exhaust problems, you have to think outside the box. hope this journey helps someone.

Firecrew,

What was your overall experience with the TRD exhaust? I've read, on different forums, 2 seperate people who dynoed their tundra with the stock exhaust and then installed the TRD the same day and dynoed the truck again and both gain a 4hp difference with the TRD.

[07 firecrew]

TRD says about 5hp, that's what i was told, there is a defanant drone around 60. now that i have sold it, which i forgot to mention, i would not have the duel exhaust, for cosmetics and torque reasons. remember, when you install a free flowing exhaust, the power range goes up higher rpms, unless you make changes yourself.

[07 firecrew]

my pictures are already posted. look under(drone stopper)

[07 firecrew]

if i were to describe the zoomers; it does what they advertise, there is more performance with it, noticed more torque that hp. zoomers can add the resonators before you purchase, this maybe biased, but if you are over 40yo get a resonator behind it.

[dadriva]

While I appreciate your time and efforts, how did you make these observations?

Was this on the "butt dyno" or did you use a dyno?

Until then, it appears to me that the evidence of a "gain" or a "loss" is purely subjective.

Again, I appreciate what you are doing for the community but verifiable proof is always nice. Thanks!

[07 firecrew]

all 3'' exhaust will loose some low end, since the factory pipe is smaller( greater exhaust velocity) than the aftermarket 3''( some velocity loss at low end) but a little stronger on top.

[07 firecrew]

dad; in life, at some point you realize what is good for you and what pleases you. one thing i will say, being the daily driver, my present combo gives away nothing to the stock setup, it may very well a little stronger, but i'm not in racing, so if you like the term butt dyno, it works for me. remember this, every aftermarket exhaust is designed for max top end power, and that's what you get, that extra 5-10hp at top end, unless you think outside the box( using smaller pipe, muffler with more backpressure).

[TacoWillie]

So 07 Firecrew,
Would it have be just as well performance wise to do one of the following?

1. Just replace the restrictive OEM muffler with a Flowmaster 70 Series
with the OEM tailpipe and resonator

2. Replace the OEM muffler/resonator/tailpipe with a Flowmaster 70 and
a 2.25" or 2.5" tailpipe. I like the throaty sound...

[07 firecrew]

willie that will certainly help any drone and loud volume, but the aero turbine does a better job because of its lenght, almost double the size of stock one. i will never buy a full system.

[blackbeauty]

Originally Posted by TacoWillie

So 07 Firecrew,
Would it have be just as well performance wise to do one of the following?

1. Just replace the restrictive OEM muffler with a Flowmaster 70 Series
with the OEM tailpipe and resonator

2. Replace the OEM muffler/resonator/tailpipe with a Flowmaster 70 and
a 2.25" or 2.5" tailpipe. I like the throaty sound...

I wouldn't install anything smaller than a 2 3/4" tailpipe on the 5.7 it would likely be to restrictive. On a 4.7 you would but not the 5.7.