Increase the Turbo Sound?

Almost every factory car, even sporty cars, with turbos have a massive amount of plastic to reduce the induction sound. Believe it or not, to a lot of people sounding like a semi truck isn’t appealing to everyone. That said, your intake baffling of the stock air box is reducing the sound going in, and it likely has a turbo muffler as well. I’ve not worked on a 3rd gen tundra, but that is how they quiet a modern turbo engine.

you don’t just take these off. You’d want to replace them with thinner, more open element aftermarket parts to get the sound to open up.

 

You couldn’t hear the turbo on my Audi, but with just an intake it sounded like this.

The pops and bangs coming from the exhaust was due to a tune not an aftermarket exhaust.

https://youtube.com/shorts/J_uIakazjIE?feature=share

 

Yes they do, but it’s the fake v8 sound not turbo, I know the difference

 

Maybe you could try the whistle tips for the exhaust… different sound but just an idea…… haha

 

Omg those are still a thing!?

 

Correct but ford people are fortunate enough to have software called Forscan to do whatever the hell we want with the modules in the truck, including turning off noises.

 

Yeah first thing I’d do. Most vehicles have some sort of device you can get like that.

the fake engine noise machines they’re doing on modern vehicles is just annoying

 

Only if you know its fake. If you don't then ignorance is bliss. You just think your truck sounds good

 

Lmao I won’t lie.. that was me with my Audi. Then I turned it off and realized the car was making basically no noise from the engine bay

 

So I believe that in this video, the car care nut slightly touched on why Tundra turbos aren't loud.

(forgive my noob explanation but here it goes)

It has to do something with that on wrx turbos were releasing air back out in the open - that's why it was louder, but in Tundra, turbos release air back into the engine system so that it's muffled, and you can't simply open up that turbo exhaust air line and have it air outside for more sound because that'll throw a CEL because truck engine system is expecting to receive all of that turbo exhaust back to itself and is counting it all...

I think the correct technical explanation somewhere in the his awesome video

https://youtube.com/watch?v=EKRlBoj0s7E&si=EnSIkaIECMiOmarE

 

I actually liked the way mine sounded with the fake v8 noise lol

 

Yes and no. The hot end feedback on the tundra will dampen the sound some but the biggest thing is the exhaust system itself. Subbies only have a couple cats and a single muffler (often modified to louder resonators). The tundra has several cats and a muffler designed to hush the exhaust as much as possible without sacrificing performance.

Unbolt the exhaust just after the cats and you'll sound like a dump truck full of angry bumblebees.

 

You spelled Subie wrong... Just say'in...

 

That’s not the actual name is it? Really? Forscan?
I had a ford once, but now I don’t. I had my forscan removed.

 

Damn it. I heavily considered a circumcision joke.

Something something, make sure to keep your fordscan clean.

 

They both recirculate the air back into the intake from the factory. If you vent that air to the atmosphere then you get the loud sound of air blowing off. Some people like that noise and add Blow off valves to get it. That said, the factory tune accounts for the air recirculated so if the air isn’t there, it can cause issues.

 

I guess it's time for the "turbo talk".

A factory turbo charged vehicle will have 2 special components built into the system. The recirculation valve and the waste gate.

A turbo charger is simple. It has a compressor (cold side) and an impeller (hot side). A hot side and a cold side! The cold side is what feeds the engine (intake). The hot side feeds the turbo (exhaust). Factory turbos are generally quite small (excluding some diesel and industrial applications). These impellers spin on the same shaft. When you give the engine gas (rpms) it creates more exhaust, which spins the hot side faster, which equally spins the cold side faster (the ratio isn't 1:1), feeding more air to the engine creating compressed air inside the cylinders which creates positive pressures which equals boost.

Now how does the engine control the air??

The recirculation valve (cold side) and waste gate (hot side).

The waste gate is generally a static component. It has a spring inside it that has a set pressure limit to close a flap on the turbo housing to shut off exhaust feed to the turbo. This reduces over-spool. Once that limit is reached- pop, pressure (exhaust feed) is diverted back to the exhaust manifold. The pressure change on the hot side keeps the turbo from continuing to spool, reducing unwanted intake feeding. But it has a set limit and only useful during throttle.

The recirculation valve covers the rest. It uses the excess pressure from the cold side and bleeds it off to prevent "compressor surge".

Compressor surge is dangerous for an engine (and turbo!) because any spinning object has mass. And mass takes energy to stop. Well, an engine won't spend energy to stop energy (defeats the purpose!). So it just let's the excess pressure bleed out and let the engine do what it was designed to do with it. Factory engines are designed to repurpose that air. A BOV just vents to atmosphere.

And that's the problem. A BOV isn't really needed until you get into bigger turbos that can't slow down fast enough (factory has baby snails!).

That "wer wer wer" sound you hear instead of the "weeeeeeerrrrrr" is compressor surge. It's the turbo fighting the engine for giving back the air it just compressed.

 

It made by a Russian dude, he probably has no clue.

 

Thats the thing, it doesnt sound bad. People are just annoyed because they know its not authentic.

 

Milli Vanilli style.
If you get that reference, welcome to middle/old age.

 

Wow, this tread blew up, lol. I'll have to take a closer look at the intakes on the truck to see if there are any baffles that can be removed.

 

Run a vacuum line from air box through firewall into cabin.

seriously though when changing from an oem hood to aftermarket on another car, it’s crazy how much sound oem’s dampen out.

 

Lol love it!

 

“Made by a Russian dude, he probably thought it was hilarious”

fixed that for you

 

I almost bought a 2004 WRX STI…but then I test drove a 2003 Infiniti G35 Coupe (6 speed with brembo brakes) and was sold - IMO sounded better…loved the STI too, but interior was so spartan. Wish I never sold that G35…never had any interest in the G37 or other crap they put out.

I was also in my early 20s and living in Los Angeles…so I was generally an idiot.

 

I was wondering what the shop guy was ranting while he was tearing up the shop looking for his "foreskin".

Now it all make sense.

 

Certainly the G35 is a much more comfortable car with buckets more sound deadening making it feel more solid as well. Honestly the G35 was much more of a grand touring car in comparison… The WRX STI was a raw, visceral, roller coaster of a machine and that’s what made it great. They took their smallest cheapest car and jammed their best drivetrain in it. I would argue it was kind of the “muscle car” of that generation. As an added bonus it showed up all the pseudo muscle cars of that era as well. It really is a shame they never updated the drivetrain over its life span. It’s an even greater shame that it’s now been euthanized.