External Wastegate Dump

[david-b]

Hey all;
Just quick question. When using an external wastegate, what's the best location to dump into the exhaust? Do you want to run the pipe and merge into the downpipe, or someplace after the cat, or just dump straight down? What would be best, and why? I've seen on tuners that some people just basically ran a straight pipe down. Weird.

[Blackcrow64]

Its all about sound and backpressure... If you don't mind the crazy awesome sound of running it atmosphere, then thats your best bet. If you run it back into the downpipe, make sure its far enough don't that its not gonna be making backpressure on the wastegate. If the pressure builds in the dump pipe then you'll get boost creep. For now I'm just gonna dump mine atmosphere so I have no problems with creep and so it sounds ridiculously awesome. lol

[Shpyder]

I've heard dumping wg to atmosphere makes your DSM sound like a jet at open throttle. That's awesome!

[gthompson97]

Originally Posted by david-b

Hey all;
Just quick question. When using an external wastegate, what's the best location to dump into the exhaust? Do you want to run the pipe and merge into the downpipe, or someplace after the cat, or just dump straight down? What would be best, and why? I've seen on tuners that some people just basically ran a straight pipe down. Weird.

Ignoring the fact that you might just be curious, why do you want to know?


Wait, what's that stench? Oooo do I smell some forced induction coming into the game?!?

[david-b]

HAHA. I'm just asking for uh, personal enjoyment.

Now, if "Bob" dumps from the wastegate to the atmosphere, it's not going to be loud. Now, this will only be when it hits enough boost to start dumping, right? So you wouldn't be able to hear it at idle or low boost, porbably only at WOT, right?

[gthompson97]

Yeah, usually only at high rpms.

[crunchymilk55]

I had a friend run the pipe down and stick a motorcycle muffler on it. Worked well.

[david-b]

HAHA... that's awesome. What's the purpose of that?

[gthompson97]

So it wouldn't be so loud, like Shpyder said, it'll sound like a jet.....maybe not with your turbo'd 420a though

[david-b]

Originally Posted by gthompson97

So it wouldn't be so loud, like Shpyder said, it'll sound like a jet.....maybe not with your turbo'd 420a though

I don't know what you're talking about.

[defiancy]

WG atmosphere dump ftw!

[david-b]

So then, where the best place to be to dump it at? Just a straight down pipe from the wastegate to the ground? Or would something with a little bend work, and then cut out at the cat? Isn't it basically going to sound like a car with a open DP then if it's open right by the engine?

[gthompson97]

Originally Posted by david-b

Isn't it basically going to sound like a car with a open DP then if it's open right by the engine?

No because the WG only opens when there is an excess of turbo pressure, so it's not open all the time....but being as you're going turbo and all I assume you already know that.

You can dump it wherever you want, right after the WG, you could run a tube down to the cat, or you could even run an extra tube all the way along the exhaust to the back of the car, an atmospheric dump is the same no matter where you "dump" it.

[david-b]

Damn you just won't give up will ya? Can't I ask for a friend?

That would be cool to have it coming out the side like in front or back of a front wheel. Then when you're going and you hit max boost and it starts flowing, it'll scare the hell out out the people next to you.

[xavier3jr]

oh shit the n/t master is going turbo O_O i knew this was going to happen haha