Star Kit Owners and our Wastegates

[BigRand]

Hey so I went to a muffler shop today up in northern seattle area, and wanted to try to get my flex pipe installed on the 2.5 in down pipe.

So while we were inspecting it we came across a few things to wonder about.

First he said that I didnt' really need the flex pipe because its a cast manifold and those have a hard time breaking, but if I wanted he would weld a bracket to take stress off the top part of the downpipe and still allow it to be taken off with easy.

2ND PART AND THE BIG PART

We all know how big our delta mark 2's are, but check out that pipe that comes out the bottom and leads..........NO WHERE.
Big exhuast leak don't you think? I guess most other turbo applications that tube normally runs back into the down pipe back into the exhaust path, so he said he would fabricate the pipe to run back into my down pipe.
Anyone see this as a problem?
I figure it would quiet down the wastegate and just be better for the engine bay itself

Let me know what you think

 

[DSM-ZERO]

The reason why you want a separate pipe for the wastegate is BECAUSE

it effectivey will increase the total exhaust flow.
your watsegate will be more responsive.
and more effective in controlling boost.

if you do recirculate your WG pipe it might crack over time
why
your WG pipe will be closed most of the time but when it opens it will heat up that pipe pretty quick. This will happen every time the WG opens. If your WG pipe cannot expand and contract properly it will crack over time due to temperture fluctuation.

I say leave it open

 

[GSGoinFast]

The reason why you want a separate pipe for the wastegate is BECAUSE

it effectivey will increase the total exhaust flow.
your watsegate will be more responsive.
and more effective in controlling boost.

if you do recirculate your WG pipe it might crack over time
why
your WG pipe will be closed most of the time but when it opens it will heat up that pipe pretty quick. This will happen every time the WG opens. If your WG pipe cannot expand and contract properly it will crack over time due to temperture fluctuation.

I say leave it open

that pipe is going to get pretty hot anyways regardless of whether or not the wastegate opens just from the fact that its in the engine bay right by the manifold, and exhaust gas would get in there as if flows down the downpipe. Its ok to reconnect it to the exhaust, but the farther down the line that you do, the better. try to go a minimum of 18 inches. or maybe go dual exhaust and give it it's own muffler and piping

 

[BigRand]

go dual exhaust and give it it's own muffler and piping

!

I was looking at it again, and thinking that might not be a bad idea. Or at least extend the pipe farther down and out of the engine bay.

I was thinking it might even be benifcial to weld it to the downpipe about 6-9in away from the cat (or where it would be) with a small flex pipe on that.

 

[BigRand]

Just made a phone call to my shop.

The guys said it really wasn't needed, but would be better if I was trying to pass emmissions (thats a note to you cali drivers with the star kit).


The guy at the muffler shop said he would do it for like an hour of labor so thats like $85. He said even if he goes over that should cover it. So I might just do that and have it welded to the down pipe as low as possible. What we have to make sure is that when you bolt up the down pipe and the pipe for the wastegate it goes in and out smoothly.

ACTUALLY

Changed my mind again, I don't really want to spend the money on that right now, so maybe later in the summer and after I'm tuned so I can see if there was a difference.

 

[GSGoinFast]

Just made a phone call to my shop.

The guys said it really wasn't needed, but would be better if I was trying to pass emmissions (thats a note to you cali drivers with the star kit).


The guy at the muffler shop said he would do it for like an hour of labor so thats like $85. He said even if he goes over that should cover it. So I might just do that and have it welded to the down pipe as low as possible. What we have to make sure is that when you bolt up the down pipe and the pipe for the wastegate it goes in and out smoothly.

ACTUALLY

Changed my mind again, I don't really want to spend the money on that right now, so maybe later in the summer and after I'm tuned so I can see if there was a difference.

as someone who had a major exhaust leak in the engine bay, it might be in your best interest to get that welded. granted i had a mega huge leak out of my mani and downpipe, it made me get headaches and made me sick. ehh i still have a down pipe leak and i dont get sick anymore, so you may be ok, i dunno ive never used or rode in a star kit equipped 2gnt. i guess its your choice, and if it bugs you you could always get it welded

 

[DSM-ZERO]

leave it open it's for the better

 

[BigRand]

Heads: I weld it up, Tails: I leave it open.
Damn this is tough.

DSMZero could you give me a little more clarity as to why I should leave it open?

I guess I'm wondering because don't a lot of other downpipes have a whole for the external wastegate tube?

 

[DSM-ZERO]

The reason why you want a separate pipe for the wastegate is BECAUSE

it effectivey will increase the total exhaust flow.
your watsegate will be more responsive.
and more effective in controlling boost.

if you do recirculate your WG pipe it might crack over time
why
your WG pipe will be closed most of the time but when it opens it will heat up that pipe pretty quick. This will happen every time the WG opens. If your WG pipe cannot expand and contract properly it will crack over time due to temperture fluctuation.

I say leave it open

all of the reasons here ..
and it will also cerate turbulance in your exhaust.
it is just for the better some people recirculate because they don't like the way it sounds when the gate opens.
Open= a performance aspect, it all about performance when its open "you mean business.''
mainly the reason why you recirculate is because you have an internal WG,
and an internal WG is not going perform better thatn an external on. PERIOD

 

[BigRand]

all of the reasons here ..
and it will also cerate turbulance in your exhaust.
it is just for the better some people recirculate because they don't like the way it sounds when the gate opens.
Open= a performance aspect, it all about performance when its open "you mean business.''
mainly the reason why you recirculate is because you have an internal WG,
and an internal WG is not going perform better thatn an external on. PERIOD

Okay I'm sold, plus I won't have to spend the money on it.

 

[GSGoinFast]

all of the reasons here ..
and it will also cerate turbulance in your exhaust.
it is just for the better some people recirculate because they don't like the way it sounds when the gate opens.
Open= a performance aspect, it all about performance when its open "you mean business.''
mainly the reason why you recirculate is because you have an internal WG,
and an internal WG is not going perform better thatn an external on. PERIOD

these are all good points. I just picture the way i felt after driving my car with the exhaust leak i had and it makes me sick thinking about it .

 

[BigRand]

I guess my thinking is, why would star make a kit like this and then just leave that part unoticed. Or why no one else would have said anything about it right now.

So thats why I"m thinking its okay to just leave it.

 

[selmerguy]

i have a custom kit with a external wastegate dump tube. and i get a little wet everytime i hear it open. why would you not want to hear that? if you want to get real creative i have seen many b16's and sr20's with a mandrel bent dump tube that goes from thw wastegate to the side of the front bumper and it gets dumped outside the bay. if you do this make sure you make a heat shield for the end of the pipe or your paint will suffer 1200 to 1400 degree heat. and if you want to get even more creative use a motorcycle exhaust pipe for the end of the dump tube. or just leave it be and spend your money on something that will actually make your whip run better

 

[EvuLFleA]

If you don't like the sound - then weld it into your downpipe.

Star manifolds WILL break. Lots of them have cracked. Usually it is in the bottom left and right corners righ where the bolts go. If I could find the pics I'd show you my old broken one.

Welding is somewhat out of the question too