External wastegate venting?

[Stez]

Probably this question is pretty stupid, but anyway i'd like to know some experienced answear.
If external wastegate installed on the DSM, shoul the exhaust wastegate flange be welded into the exhaust system or it can be vented into the atmosphere???

 

[slugsgomoo]

you can run either. It's called running "atmospheric dump"

I'd check out that search function.

 

[alex]

You can have both. The only thing, one is going to kick in sooner or not at all. Wouldn't really matter what you do. Kind of a waste of money to buy an o2 dump when you already have an external wastegate.

-Alex

 

[Stez]

You can have both. The only thing, one is going to kick in sooner or not at all. Wouldn't really matter what you do. Kind of a waste of money to buy an o2 dump when you already have an external wastegate.

-Alex

well, i actually installing the t3/t04b turbo and already have external wastegate, and i was thinking what to do, should i lead the pipe from the wastegate into the exhaust system or just vent it to atmosphere?

 

[alex]

Id vent into the atmostphere. I wouldn't worry about it. That is just my opinion, some others might say defferent.

 

[avw0516]

It doesn't matter which one way you choose. If you re-route the dump tube into your downpipe it will be much less loud at full boost, the only down side of doing this is that it costs more to re-route than it does just to dump it. If you choose not to re-route it it will just be very loud at full boost. There are no, or extremely minimal performance gains ofund by not dumping the exhaust versus re-routing it into the downpipe.
-Andrew

 

[My96AWD]

There are no, or extremely minimal performance gains ofund by not dumping the exhaust versus re-routing it into the downpipe.
-Andrew

it depends on how restrictive the rest of the exhaust is that you have on the car.

 

[Black94DSM]

I say go for the external if and only if you have a external wastegate to use. The sound of a internal wastegate being dumped sounds horrible. Also sometimes the internal wastegate will leak due to cracks around the flapper, alowing it to sound like a exhaust leak through your dump tube.

I love the sound of my external dumped to atmosphere.

 

[JamiesTSI]

As a rule of thumb do not mix your gases. Creates to much turbulance when you dump the bypassed gases back into the exhaust.

Some claim that if you dump the bypassed gases back into the exhaust futher down the exhaust stream that it will be ok. Not sure if this claim holds any truth.

Dump it to atmosphere and have fun.

 

[alex]

As a rule of thumb do not mix your gases. Creates to much turbulance when you dump the bypassed gases back into the exhaust.

Some claim that if you dump the bypassed gases back into the exhaust futher down the exhaust stream that it will be ok. Not sure if this claim holds any truth.

Dump it to atmosphere and have fun.

Yes. I would 100% agree with him. Another thing too, it will sound a lot louder. It will sound like your hitting VTEC with a JDM (just to compare).

 

[Stez]

yes, i will probably dump it to atmosphere, because: 1) it seems to be less restrictive for exhaust 2) it is easier to istall my external wastegate (don't need re-route) 3) i love then powerfull car sounds loud... (i hope my car will be pretty powerfull after finishing of all my installations...

 

[99gst_racer]

You can have both. The only thing, one is going to kick in sooner or not at all. Wouldn't really matter what you do. Kind of a waste of money to buy an o2 dump when you already have an external wastegate.

-Alex

WTF What?

The thread starter is asking to whether he can dump from the external gate, or re-route from the external gate......

As a rule of thumb do not mix your gases. Creates to much turbulance when you dump the bypassed gases back into the exhaust.

Not 100% accurate. Exhaust gasses always mix, unless you drive a top fuel dragster. Think about it. Our heads have four exhaust ports that run through manifold/header runners and meet in a collector. That's proof that it is common to "combine gasses".

You can re-route your external dump just fine as long as the introduction of the dumped gasses are close to the same angle and traveling the same direction as the original exhaust gasses. That way the introduction will be smooth and unobtrusive.

 

[airmail96]

Kinda like why you port the wall for the hole the wastegate gases come out of on the stock 02 housing.

 

[Black94DSM]

Yeah, so on your re-route tube, you dont want the tube to be welded at a 90 degree angle. You moreso want it welded at a 45 degree or less.

 

[99gst_racer]

^^^ That is correct.

 

[cfisher]

Just dump it and go scare old people. Mine is loud as shit.