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Old 03-05-2001, 05:33 PM   #1
NickSTi
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Question Turbo Guys what headers are you using?

This question came up and i did a search and still nothing so I am wondering:
What kind of headers are you turbo guys using? Stock? Legacy with legacy xmember to fit? Other?

I used the 2nd Gen Borlas on my old setup and they get knocked around a lot not being up to the job. I saw another thread come up about using 3rd gen headers on a turbo and it seems everyone has a prob using them but me. All the other turbo headers I hear of need you to change your crossmember.
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Old 03-05-2001, 05:34 PM   #2
tom@kartboy
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i have the newest gen borlas and they work great so far..
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Old 03-05-2001, 05:40 PM   #3
stimpy
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I _will_ be using the legacy turbo headers with a legacy turbo w/in the month.

Many people think that the borla headers will affect the exhaust gas velocity and slow down turbo spool, but I don't think there is any opinions on a before and after. I think there are a number of people running the borlas and turbo with no problems. Just make sure that your turbo has additional support so its wieght isn't totally resting on the headers.

-Jon
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Old 03-05-2001, 05:43 PM   #4
8Complex

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Stock unless I happen to make a set of my own in the future. Just think of it this way... the Rigoli's are running the stock headers on thier beast.
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Old 03-05-2001, 06:13 PM   #5
ColinL
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So what?
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Old 03-05-2001, 06:53 PM   #6
t.rod
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I wonder if the Rigoli's ever tried using the Borla headers and decided that the stock one's where better for what ever reason and that's why they are using the stock ones now.
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Old 03-06-2001, 05:36 AM   #7
scoobiejosh
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8Complex: They are using the stock WRX exhaust manifolds, not the stock RS exhaust manifolds. I believe the WRX exhaust manifolds flow much better than the RS exhaust manifolds, at least by looking at the design, and from what I have heard.
It is important not to have too free flowing of a exhaust manifold when it is as long as it is on the boxer turbo aplications, as to not loose velosity. If I am talking out of my a$$ somebody correct me.

Josh
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Old 03-06-2001, 06:08 AM   #8
Rich L
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NickSTi

Im using the 2nd Gen. Borlas.
It my opinion that they do increase spool up time... (Im hitting full boost at close to 3000rpms)

but... I also think they help improve mid-range and upper rpm breathing as well.

I think they are a good choice.
And it would be in your best interest to use an extra support with the Borla/turbo combo.

Rallispec knows where to install the support bracket. Call them if you have questions.
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Old 03-06-2001, 07:01 AM   #9
NickSTi
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Wink

Rich why would I do a crazy thing like that (Call Rallispec)?
You are the second person that I heard say that about the Borla Gen 2s (me being the first ). On my setup I see boost around 2800 and full boost depending on how much boost I am running is low to mid 3k. Plus those babies really open up under wot.
So I guess the best bang for the buck is find some used gen 2 borlas. I wonder what the other 247 turbo ppl are using.
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Old 03-06-2001, 09:02 AM   #10
adam99rs
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Just my .02...I would stick to the stock RS "headers"..they are more than fine, and you know they fit. I was all gung ho about doing a nice set of headers (probably Cusco's via Alex) on my STi motor, but in the end decided against it. From what many friends in Japan and the UK said, the power increases were really negliable in relationship to the price. The Borlas are certainly much less expensive, but personally, I would invest some of that money into having Andy at Rallispec make you one of his aesome downpipes (tremdous help in spoling, getting yourself a better/larger intercooler (maybe one from Scoobymania in the UK, or MRT), or putting it towards a LINK, TEC, or into a better made turbo to begin with...I think you will find that at least on this car, the headers are good for yeilding that last 5-6 hp, but not much else. They do not have the dramatic effect that they have on other cars. On my Minnam setup, with Andy's downpipe, I was at 18 psi by 3200 rpm.....I don't think you could get better flow from that. Keep in mind that is with the very non-dramatic, plain Jane Minnam turbo....with a really properly engineered turbo from a place like Blue Ribbon in NY, TEC in CO., or best yet FasTrax in Cali., you can get much more bang for your buck.
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Old 03-06-2001, 09:06 AM   #11
SCOOBYSHAG
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Majestic Turbo is another good place...
www.dallasturbo.com
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Old 03-06-2001, 09:38 AM   #12
ASR
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If Rigolis used the Borla headers they wouldn't make it down the 1/4. Borlas are made out of 304 stainless steel which is not great for turbo applications. It does not stand up to the heat that well, not to mention it was not designed for a turbo application. They crystallize after a couple of high boost passes and crack open like a watermelon. There isn't any double slip joints that would allow the header to shrink and grow. On a good turbo header you have these double slip joint so your header will not crack when it shrinks, and grows under extreme turbo heat changes. Take a look at the Syms headers you will see what I am talking about.
I will post a pic of our race header pretty soon that has a Indy Car type 4into1 collector so you guys can take a look.
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Old 03-06-2001, 10:13 AM   #13
Rich L
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ASR
what if your only running 6psi?
My car is far from running as much power as "Rigolis"...
and what is the turbo is supported by a bracket? What would you expect the longevity of the header to be like?
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Old 03-06-2001, 11:15 AM   #14
RallySport
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What about reliability issues? Would a better flowing exhaust header prevent knocking by decreasing the back pressure or can this be more or less remedied by using a good downpipe. Would a small amount of back-pressure contribute to knock at all if I were to run ~10psi with stock internals (MY00'RS)?

Curious to know if any of you guys have any thoughts on this...
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Old 03-06-2001, 03:27 PM   #15
ASR
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At 6psi you should be fine. I do recommend using a couple of brackets on the turbo. This way you will keep the weight of the turbo off the headers.
You can have the best flowing headers but if you have a restrictive down pipe and exhaust that kinda defeats the purpose. At 10psi, I would watch your EGTs very closely.
Dont forget about bracketing the turbo people!!!
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