[tofu?]

Originally Posted by JunkyardDogg

Will it sound like this? Skip to 1:20

Just sounds like an open/freeflowing catless exhaust with the open wastegate bit7/fud98 setting


Edit: on second listen, it sounds ridiculous. I want it to sounds like an amg or ftype, not like my car is broken and belching

[J. Dub]

Originally Posted by tofu?

Just sounds like an open/freeflowing catless exhaust with the open wastegate bit7/fud98 setting


Edit: on second listen, it sounds ridiculous. I want it to sounds like an amg or ftype, not like my car is broken and belching

What is open wastegate bit7/fud98 setting? Is that a jb4 thing? I have mhd

[jyamona]

That sounds like poop. Just wait.

[tofu?]

Originally Posted by J. Dub

What is open wastegate bit7/fud98 setting? Is that a jb4 thing? I have mhd

yeah it's a jb4 thing

[_ink]

Originally Posted by jyamona

That sounds like poop. Just wait.

Waiting........

[bpdef29]

That sounded like popcorn in the microwave lol

[J. Dub]

Originally Posted by jyamona

That sounds like poop. Just wait.

Shit I actually liked it

[J. Dub]

Originally Posted by tofu?

yeah it's a jb4 thing

What does it do? Besides make popcorn noises like in that video

[tofu?]

Originally Posted by J. Dub

What does it do? Besides make popcorn noises like in that video

wastegate is fully open when there's no throttle. on a stock exhaust, or at least with the secondary cats in place, it wouldnt be as obnoxious

[J. Dub]

Originally Posted by tofu?

wastegate is fully open when there's no throttle. on a stock exhaust, or at least with the secondary cats in place, it wouldnt be as obnoxious

What benefit is that to our cars? Sorry for all the questions.

[T1M]

Just means the natural crackles that occur in the N54 aren't muted by being forced through the turbines. The open waste gates allow them into the downpipes freely so they're louder. Pop a vac line off your vac canister and rev the car in the garage and you'll see what I mean.

[tofu?]

Originally Posted by T1M

Just means the natural crackles that occur in the N54 aren't muted by being forced through the turbines. The open waste gates allow them into the downpipes freely so they're louder. Pop a vac line off your vac canister and rev the car in the garage and you'll see what I mean.

Well, it's a lot louder under load and I think the guy in the video was feathering the throttle to keep the pops going

[T1M]

Yeah would definitely be louder driving it with the WG's open, I've never done that. The only way to keep the car burbling stock is to feather the throttle, he's got to be doing that to keep it going. I don't personally even want it to crackle continuously on decel, just a little 0.3 sec burst would be all that's needed to give it some character.

[J. Dub]

Originally Posted by T1M

Just means the natural crackles that occur in the N54 aren't muted by being forced through the turbines. The open waste gates allow them into the downpipes freely so they're louder. Pop a vac line off your vac canister and rev the car in the garage and you'll see what I mean.

So if one wanted to have wastegate's open all the time but doesn't have jb4, we would just drive with the vacuum hose disconnected on one vac canister?

[T1M]

Well, perhaps both unplugged, I just unplugged one and revved the car in the garage doing some troubleshooting and it was super loud. But your turbos won't make any boost (open WG's).

[Fuji]

Originally Posted by J. Dub

So if one wanted to have wastegate's open all the time but doesn't have jb4, we would just drive with the vacuum hose disconnected on one vac canister?

You could if you wanted 0 boost haha

[J. Dub]

Originally Posted by Fuji

You could if you wanted 0 boost haha

Well I've read people removing both canisters all together with no ill effects.

[Fuji]

Originally Posted by J. Dub

Well I've read people removing both canisters all together with no ill effects.

I guess if you reconnected the lines to each other and excluded the vacuum canisters, but you need vacuum to operate the wastegate actuators... Otherwise they'll default to open (no boost)!

[Supra2k6]

wouldn't that make it spool slower as well if the WG is open all the time. I rather hurt mpg then slow boost build up. Anyways back to topic any weekend updates>? lol

Originally Posted by J. Dub

So if one wanted to have wastegate's open all the time but doesn't have jb4, we would just drive with the vacuum hose disconnected on one vac canister?

Originally Posted by J. Dub

Well I've read people removing both canisters all together with no ill effects.

Come on dude

After all that time you've spent in the MHD thread(s) you should know what a flash tune is capable of modifying at this point.

As for the "canisters" it sounds like you're assuming they actually create vacuum somehow; that obviously isn't the case. Go back and look at the available diagrams (google is your friend) to help you understand the boost/vacuum architecture in this respective system.

Originally Posted by Supra2k6

wouldn't that make it spool slower as well if the WG is open all the time.

Obviously. Not sure how you're associating that with MPGs though.

[TrollToll]

Originally Posted by Fuji

I guess if you reconnected the lines to each other and excluded the vacuum canisters, but you need vacuum to operate the wastegate actuators... Otherwise they'll default to open (no boost)!

He's read posts where people have excluded the canisters but connected the rest as it was originally. Basically the solenoids and actuators still receive vacuum but they don't have the reservoirs there to store vacuum pressure. To be honest I'm not sure why they are needed. Because that side of the system is run by a vacuum pump, I would expect that they always have the required vacuum to run the wastegates. The canisters may also be a reason for wastegate rattle during startup as they provide more volume to be evacuated and would slow down the closing of the wastegates, causing rattle. That last part is just speculation though. I haven't tried it.