Exhaust Ideas ... again.

[sunbeam]

@sunbeam - If you mean the red highlighted item in post #1, that red highlighted item is the resonator. I think generally they're empty inside. That volume change (I don't know how to say this correctly) throws off the resonant frequencies, at least by a great deal, so that it greatly reduces or eliminates drone.

@Space Wolf - No problem with the late timing. I, for one (I'm sure there's others) don't mind some thread drift or late comments or whatever. You never know what might come out of such things. When and if I get off my dead lazy arse, I'm going to swap my stock exhaust with one in which I will experiment. So, if I don't like what's going on with my experimental exhaust, I'll put my stock exhaust back on. In post #7 (I believe it was) in the far bottom left is the 2nd cat. 2nd cat at least on U.S. models of my 2020 model year. I'm going to drop that catalyst, but keep the first catalyst. I'm going to look into it a bit more, but it seems the 2nd one really only helps emissions with the first seconds after startup. Sounds counter-intuitive, you'd think the first one would be the pre-cat. It must have to do with the materials of the 2nd cat. Anywho - from my understanding it only helps about 1% or 2% as much as the first, from my understanding. I may get nothing out of removing it. I'll collect data (dragstrip).

I got all discombobulated this weekend. I spent a couple hours loading sticks / brush / yard debris onto my utility trailer Friday after work. Only to have it rain hard at about 6 am Saturday, then find out the recycle center was closed. Then my son wanted to use the truck I was going to, so I had to unload grass bags out of the back and clean the bed out because he was wanting to truck camp in the bed. He wasn't at home at that time to do it himself. It was wet and sloppy the rest of Saturday so I didn't make it to the junkyard as I didn't want to have to lay in the slop. Then had a kill-dawg headache the first 2/3rds of Sunday. Then the wife wanted to duke it out Sunday once I felt better ... what a waste of a weekend.

https://mirageforum.com/forum/showth...tic-converters

A yes I see now.


The additional extra noise does not seem worth the potential benefits to me.

The other thing to note as others have said, when you delete the resonator this will change the exhaust flow, meaning some sort of tuning could be expected I think.


That being said, would be interested to hear your results with this.

[7milesout]

The additional extra noise does not seem worth the potential benefits to me.

With respect, I think you might have missed my point. Or else I haven't communicated my point very well. The 2nd sentence is more likely.

The additional noise is the only benefit I'm pursuing. But I want the noise to be a) not excessive, and b) not annoying.

Here's a makeshift list of what I'd like to achieve.

• A really cute noise, for such a cute heavy haul tow rig.
• Not too loud, I want to be able to crank it at 6 am and not be waking the neighbors.
• Not an annoying fart can type of sound.
• No reduction in power. If it gains a bit of power, so be it. I will take hp data to confirm. Any gain in power is going to be pointless, it will still get crushed by all other cars on the road.

If one can imagine the sound of a BMW inline 6, that is opened up just a little. That is a sweet sound. An inline 3 is just not going to sound like that. The best I can hope for is perhaps a friendly version of a 6V71 sound. It's a very difficult thing to put into words. And perhaps, even more difficult to achieve.

@Grumpy - I just exactly now realized ... a few years ago, I jettisoned the stock muffler on my dad's 4.8L GMC Sierra, in place for a Borla muffler I had taken off my Scamp. Muffler for muffler. The Borla is just a middle of the road sound for them. It was a great muffler, I just wanted the Scamp louder. But it was PERFECT on my dad's (now mine) truck. It sounded as if his 4.8L engine put on its big-boy pants. It will not wake the dead, or the neighbors. But it sounds just so nice. And at highway speeds, you'd have to have really great ears to hear it when cruising. It still muffles nicely. But around town and while accelerating, it gives the truck just the right amount of "attitude." That level of sound is Ed Zachery what I'd like to achieve with the Blueberry. So, yes, I think you are Ed Zachery right. I shall now investigate into a good muffler even Cherry Bomb type muffler to replace into the stock muffler position.

[Grumpy Bear]

With respect, I think you might have missed my point. Or else I haven't communicated my point very well. The 2nd sentence is more likely.

The additional noise is the only benefit I'm pursuing. But I want the noise to be a) not excessive, and b) not annoying.

Here's a makeshift list of what I'd like to achieve.

• A really cute noise, for such a cute heavy haul tow rig.
• Not too loud, I want to be able to crank it at 6 am and not be waking the neighbors.
• Not an annoying fart can type of sound.
• No reduction in power. If it gains a bit of power, so be it. I will take hp data to confirm. Any gain in power is going to be pointless, it will still get crushed by all other cars on the road.

If one can imagine the sound of a BMW inline 6, that is opened up just a little. That is a sweet sound. An inline 3 is just not going to sound like that. The best I can hope for is perhaps a friendly version of a 6V71 sound. It's a very difficult thing to put into words. And perhaps, even more difficult to achieve.

@Grumpy - I just exactly now realized ... a few years ago, I jettisoned the stock muffler on my dad's 4.8L GMC Sierra, in place for a Borla muffler I had taken off my Scamp. Muffler for muffler. The Borla is just a middle of the road sound for them. It was a great muffler, I just wanted the Scamp louder. But it was PERFECT on my dad's (now mine) truck. It sounded as if his 4.8L engine put on its big-boy pants. It will not wake the dead, or the neighbors. But it sounds just so nice. And at highway speeds, you'd have to have really great ears to hear it when cruising. It still muffles nicely. But around town and while accelerating, it gives the truck just the right amount of "attitude." That level of sound is Ed Zachery what I'd like to achieve with the Blueberry. So, yes, I think you are Ed Zachery right. I shall now investigate into a good muffler even Cherry Bomb type muffler to replace into the stock muffler position.

Dad put Trush glass packs on everything. Loved the sound.

[Fummins]

With respect, I think you might have missed my point. Or else I haven't communicated my point very well. The 2nd sentence is more likely.

The additional noise is the only benefit I'm pursuing. But I want the noise to be a) not excessive, and b) not annoying.

Here's a makeshift list of what I'd like to achieve.

• A really cute noise, for such a cute heavy haul tow rig.
• Not too loud, I want to be able to crank it at 6 am and not be waking the neighbors.
• Not an annoying fart can type of sound.
• No reduction in power. If it gains a bit of power, so be it. I will take hp data to confirm. Any gain in power is going to be pointless, it will still get crushed by all other cars on the road.

If one can imagine the sound of a BMW inline 6, that is opened up just a little. That is a sweet sound. An inline 3 is just not going to sound like that. The best I can hope for is perhaps a friendly version of a 6V71 sound. It's a very difficult thing to put into words. And perhaps, even more difficult to achieve.

@Grumpy - I just exactly now realized ... a few years ago, I jettisoned the stock muffler on my dad's 4.8L GMC Sierra, in place for a Borla muffler I had taken off my Scamp. Muffler for muffler. The Borla is just a middle of the road sound for them. It was a great muffler, I just wanted the Scamp louder. But it was PERFECT on my dad's (now mine) truck. It sounded as if his 4.8L engine put on its big-boy pants. It will not wake the dead, or the neighbors. But it sounds just so nice. And at highway speeds, you'd have to have really great ears to hear it when cruising. It still muffles nicely. But around town and while accelerating, it gives the truck just the right amount of "attitude." That level of sound is Ed Zachery what I'd like to achieve with the Blueberry. So, yes, I think you are Ed Zachery right. I shall now investigate into a good muffler even Cherry Bomb type muffler to replace into the stock muffler position.

Take the resonator off the air intake. 1 10mm bolt, and you'll have instant full throttle race car sounds! Or did you try that already?

[7milesout]

Take the resonator off the air intake. 1 10mm bolt, and you'll have instant full throttle race car sounds! Or did you try that already?

No, I haven't tried it. Seems like there could be some (performance) disadvantage to doing that. Or am I wrong?

And ... you're saying the resonator, not the whole snorkel, right? But taking off the resonator, won't that leave it open behind the snorkel, rendering the snorkel useless?

I gotsta know ... me like instant full throttle race car sounds!

[Fummins]

No, I haven't tried it. Seems like there could be some (performance) disadvantage to doing that. Or am I wrong?

And ... you're saying the resonator, not the whole snorkel, right? But taking off the resonator, won't that leave it open behind the snorkel, rendering the snorkel useless?

I gotsta know ... me like instant full throttle race car sounds!

Yeah, remove the entire snorkel. It sounds gives it the flipped air cleaner sound of yesteryear. I did it to mine briefly when trying to pinpoint a random squeek. It felt like it had .0009 more hp in certain scenario's but I found it almost embarrassingly loud, probably be cause I have the non race car cvt edition. And it's not blue so it's generally just slower.

[7milesout]

I'll try it, and report back. Heck, it might call for a drag strip pull...

[Wallythacker]

With respect, I think you might have missed my point. Or else I haven't communicated my point very well. The 2nd sentence is more likely.

The additional noise is the only benefit I'm pursuing. But I want the noise to be a) not excessive, and b) not annoying.

Here's a makeshift list of what I'd like to achieve.

• A really cute noise, for such a cute heavy haul tow rig.
• Not too loud, I want to be able to crank it at 6 am and not be waking the neighbors.
• Not an annoying fart can type of sound.
• No reduction in power. If it gains a bit of power, so be it. I will take hp data to confirm. Any gain in power is going to be pointless, it will still get crushed by all other cars on the road.

If one can imagine the sound of a BMW inline 6, that is opened up just a little. That is a sweet sound. An inline 3 is just not going to sound like that. The best I can hope for is perhaps a friendly version of a 6V71 sound. It's a very difficult thing to put into words. And perhaps, even more difficult to achieve.

@Grumpy - I just exactly now realized ... a few years ago, I jettisoned the stock muffler on my dad's 4.8L GMC Sierra, in place for a Borla muffler I had taken off my Scamp. Muffler for muffler. The Borla is just a middle of the road sound for them. It was a great muffler, I just wanted the Scamp louder. But it was PERFECT on my dad's (now mine) truck. It sounded as if his 4.8L engine put on its big-boy pants. It will not wake the dead, or the neighbors. But it sounds just so nice. And at highway speeds, you'd have to have really great ears to hear it when cruising. It still muffles nicely. But around town and while accelerating, it gives the truck just the right amount of "attitude." That level of sound is Ed Zachery what I'd like to achieve with the Blueberry. So, yes, I think you are Ed Zachery right. I shall now investigate into a good muffler even Cherry Bomb type muffler to replace into the stock muffler position.

The sweetest sound for the street is the flat six Porsche under full throttle. And not these recent luxury rides. The twin turbo whale tail ride.

[7milesout]

Probably. I plan to go to a local junkyard that has a 2019 and see if I can access the exhaust. And if so I will try to pull it off. Then I'm going to begin experimentation.

Step 1: (from above): COMPLETE! Cost me ~$53. However, I wanted the stock exhaust (below).



But what I got was the below:


Someone had cut it and took the manifold and 2 catalysts.

Oh well, I can get my exhaust guy to fabricate a replacement pipe in there. I wonder where I can source the missing flange, and give to my exhaust guy, to make it easier?


Step 2: Procure a glass pack muffler. I believe a Cherry Bomb is just a marketing name for a glass pack muffler. I'm looking for suggestions. I looked at Thrush, they have some good stuff. However, at this time, I'm thinking maximum cheap for my experimentations.

As for sound, my thinking is this: I've heard Mirage exhausts with the muffler removed, and resonator left on there. That was too loud, not unpleasantly loud, but just too loud. In this case of my experiment, it will be the same as that plus removing the 2nd cat. So I definitely think some amount of muffling is going to be required to get a louder than stock, but pleasant sound. Here is the Thrush I was looking at, but there are cheaper options out there.



Other ideas are welcomed and will be considered! At least the above looks like it would last and would only need 1 reducer (on each end) to add to the exhaust.

Step 3: Do some drag strip runs before I have the exhaust modified to get "baseline" results.

Step 4: Do exhaust mods. If the sound is not terrible, proceed to step 5.

Step 5: Do some drag strip runs to get "after" results.

[7milesout]

Fummins - I took the snorkel off. I floor it so rarely, that if that snorkel had been taken off magically without me knowing it had been removed, it would have been MONTHS before I ever noticed any sound difference. And, it's not enough for me to bother with. Of course towing, maybe I'd hear it more.

HOWEVER - In my Step 3 from above, I was planning on making 5 runs down. And probably averaging the trap speeds, as a "before" exhaust mod condition. However, now I'm thinking I'll try to make 10 runs down. 1, 3, 5, 7 and 9 will be 100% stock. 2, 4, 6, 8 and 10 will be with the snorkel removed. I'll swap it at each run because as it cools off cars tend to run just a bit quicker / faster. And this will be done on a Friday night as that's when they do "Test & Tune" night at the track in which I'll go.

And the data would be all Bidened-up if I run 5 straight runs stock, pull the snorkel do 5 more runs. The 2nd 5 runs will more than likely be slightly quicker due to the temps dropping. I don't want to "think" those quicker/faster runs were directly due to the snorkel. And that snorkel is on and off in a jiffy. I hope I can get 10 runs in (before they laugh me out of there ). As long as no Moustang drivers put it in the wall (again), I should be able to get in 10 runs.