[buco]

There is no fake engine noise on the GRC

As stated the grc doesn’t have any

All those years of those must-have exhaust notes must have caught up with him

 

[Lug_Nuts_23]

I know a number of people have mentioned heat wrapping the exhaust by the differential or even a heat shield, but I'm surprised that almost nobody has suggested ceramic coating the inside (and maybe outside too) of the pipe/section that goes by the diff to reduce heat there. It should be effective and much more permanent and resistant to weather and corrosion. (If anything, a ceramic coating will increase the life of the exhaust and won't trap moisture).

(I think one thread suggested coating the exhaust there but I can't remember which one.)

 

[Maineiac]

There is no fake engine noise on the GRC

Do you have a definite source stating there is no sound enhancement? I’ve seen videos with people pulling the plug on the GR Yaris. I assumed it was for the GRC platform as well.

 

[Maineiac]

All those years of those must-have exhaust notes must have caught up with him

Ha! I unplugged it on my M4 and my current GT4 so I do have some points of reference. My GT350 was unmolested by the factory, so that was nice.

 

[Lug_Nuts_23]

Do you have a definite source stating there is no sound enhancement? I’ve seen videos with people pulling the plug on the GR Yaris. I assumed it was for the GRC platform as well.

This post in this thread a while back:

What do you want to know about the GR Corolla?

Alright guys, I want to compile a list of the most pressing questions you guys have about the GR Corolla. The more technical, the better. There's a good chance I will have an opportunity to see the car soon as we are nearing production, and hopefully there will be some engineering support...

www.grcorollaforum.com

 

[Maineiac]

This post in this thread a while back:

What do you want to know about the GR Corolla?

Alright guys, I want to compile a list of the most pressing questions you guys have about the GR Corolla. The more technical, the better. There's a good chance I will have an opportunity to see the car soon as we are nearing production, and hopefully there will be some engineering support...

www.grcorollaforum.com

Thanks. Interesting that the GRY, GR Supra, and GR86 all have artificial sound systems.

 

[fredzy]

Gives new meaning to the phrase all-motor! Ha. It really does sound good though.

So yeah, I unplugged the valve. Drove maybe 15-20 miles like that and never had a CEL or warning or anything but GODDAMN was it loud. All boom all the time. I think it created a few interior rattles lol. Not sure I can abide. Going to have to re-think my hitch plans.

 

[woowoh_gr]

What triggers the valve to open? Idling off what someone else wrote and throttle? I would definitely like to open it or half it have some noise at all times. Also I saw a clip of a resonator delete and couldn't find it again didn't sound too bad, would like to maybe do that till someone like COBB puts out an exhaust.

 

[fredzy]

The valve is open at idle and low speed, then closes until 4000 RPM or so

 

[Maineiac]

… I would definitely like to open it or half it have some noise at all times”.

This is a photo of the valve actuator on the exhaust of a Porsche GT4. Operates open, closed, open just like the GRC. If you look at the rod that opens and closes the valve, you can see a small collar bolted on the rod. This prevents the valve from closing all the way. Users can set the sound level they want just by adjusting where the collar is mounted on the rod. I have some collars but unsure if they will fit the diameter of the rod.

This would give us sound all the time but dialed in to your personal preference of sound level.

 

[KranberrySauce]

Has anyone kept the resonator and deleted the rear muffler? Curious what that would sound like. I know someone removed the resonator but it kind of sounded like a fart cannon. Usually happens when the resonator is removed usually.

 

[Taroroot]

This post in this thread a while back:

What do you want to know about the GR Corolla?

Alright guys, I want to compile a list of the most pressing questions you guys have about the GR Corolla. The more technical, the better. There's a good chance I will have an opportunity to see the car soon as we are nearing production, and hopefully there will be some engineering support...

www.grcorollaforum.com

And the video interview with the chief engineer said it too. I am glad! The intake resonator diaphragm thing that pipes into the cabin of my FR-S is about as far as I like, when it becomes piped in through the stereo system, thats too far to me.

 

[Trapper]

I'm going titanium and straight through center exit single once tomei starts making them.

 

[Tokyotexan]

This one sounds promising...

https://m.facebook.com/groups/7252826804759086/permalink/8855835087791575/?sfnsn=mo&ref=share&mibextid=VhDh1V

 

[Trapper]

This one sounds promising...

https://m.facebook.com/groups/7252826804759086/permalink/8855835087791575/?sfnsn=mo&ref=share&mibextid=VhDh1V

That link doesn't work for me. Is that the video that guy just posted of a prototype? Sounds like a blue racket ball hitting the wall in the first bit.

 

[buco]

That link doesn't work for me. Is that the video that guy just posted of a prototype? Sounds like a blue racket ball hitting the wall in the first bit.

I got Honda vibes from that 140p video

 

[Tokyotexan]

That link doesn't work for me. Is that the video that guy just posted of a prototype? Sounds like a blue racket ball hitting the wall in the first bit.

I mean I guess....

 

[TurboGT]

@Tokyotexan that's perfect. Not too loud, no rasp.

 

[Brendan]

The only bad part about early adopting of a new platform is the painful waiting for parts to come out, I'm dying to get a louder valved exhaust.

 

[Cptnslo]

The only bad part about early adopting of a new platform is the painful waiting for parts to come out, I'm dying to get a louder valved exhaust.

It’s also going to suck when everyone buys the same exhaust because it’s first to market or you have to wait because you realize that the first one that comes out sounds like shit or sounds worse than a competitor. Brand that isn’t out yet.