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Old 04-30-2007, 09:01 PM   #701
frostyT
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I'm sorry, but I want to ****ing choke someone or something right now (probably the chicken). I just read through soooo much bull**** to find several dead links and no ****ing results! If anyone has a link PLEASE let it fly. (and make sure it works!)
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Old 05-01-2007, 11:43 PM   #702
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the link to the magazine article has been dead for quite a while. What results would you like to know?
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Old 05-22-2007, 10:11 AM   #703
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Quote:
Originally Posted by downshift1 View Post
the link to the magazine article has been dead for quite a while. What results would you like to know?
i was just looking for some results. a few dynos or one overlayed would be nice to get the idea of the torque and power curves. do you have a copy of this info?
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Old 09-16-2007, 10:12 PM   #704
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Quote:
Originally Posted by frostyT View Post
i was just looking for some results. a few dynos or one overlayed would be nice to get the idea of the torque and power curves. do you have a copy of this info?
what he said... all this work and the comprehensive results arent posted anywhere any more? i'd like to see then and i'm sure some others would too...
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Old 09-16-2007, 11:32 PM   #705
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all that reading for nothing, is there seriously not a working link or a scan somewhere???
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Old 09-17-2007, 12:24 PM   #706
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Quote:
Originally Posted by downshift1 View Post
the way the shop printed the charts was assinine. I was very unhappy with the article when it was finished.

I'll give you the short version.

All the headers with the exception of the GT Spec Ver.2 made power.

The average increase in spooltime was about 200rpm on the first cold pulls, then non-existant on the second pull. (all headers were wrapped w/ DEI wrap)

The Cusco Header made the most power by 1hp (I consider that Dyno error margin)

The GP Moto header was second making about 17hp more across the pull.

The Fujitsubo came in 3rd with about 12hp across the pull.

The Borla, Gruppe-S, and the rest came in about the same with 5-10hp

Please keep in mind that all headers that did not come with an up-pipe were tested with the Helix up-pipe to be fair against the one piece units.

I'm not mentioning the GT Spec Gen.3 as it has been discontinued and had a catastrophic failure shortly after this test (on RiftsWRX's car).

As for fitment, the Cusco, Borla, Gruppe-s, and Fujitsubo fit the best and were the easiest to install.

The GT Spec, GP Moto were the hardest.

If you have any further questions feel free to pm me.

btw- I hae since tested a set of extrude honed/ cnc port matched, jet hotted stock manifolds. The results were interesting. No loss of spool (cast iron holds heat better), and a gain of about 5hp across the band.

For the money spent ($700) to do the port job right (by hand is impossible to remove as much material as extrud hone) and the cross over pipe and the jet hot coating, I would rather spend the $699 on the GP Moto header, $60 on header wrap and make about 10 more whp.

For all those who complain about losing the "boxer rumble", remember it's teh sound of inneffecency.

Dylan
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there ya go.
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Old 09-17-2007, 01:06 PM   #707
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thanks Roman, That was a good start at least, do we have some plots to look at perhaps?
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Old 09-17-2007, 11:24 PM   #708
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FWIW, I read this whole thread about 2 years ago, trying to decide if I should buy headers along with uppipe and tbe. IIRC, most lost power early, some gained later. I wasn't impressed with any, but the borla was the best bang for the buck. With rumors of cracking, I'm taking my chances with the ebay headers, which should arrive tomorrow. For $125 shipped, I'll be the guinea pig!
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Old 09-17-2007, 11:42 PM   #709
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Originally Posted by Psipwrd View Post
I'll be the guinea pig!
Good luck with that :P
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Old 09-18-2007, 10:51 AM   #710
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How does that summary explain this dyno chart for gt spec headers as well as post #45 on page 2??http://www.jscspeed.com/part_picture...eader_dyno.jpg
I was going to pick them up based upon this dyno chart. I don't see how they 'dont make power' at all, they look almost identical design to some of the others out there??
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Old 09-18-2007, 11:00 AM   #711
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Quote:
Originally Posted by frostyT View Post
I'm sorry, but I want to ****ing choke someone or something right now (probably the chicken). I just read through soooo much bull**** to find several dead links and no ****ing results! If anyone has a link PLEASE let it fly. (and make sure it works!)
sorry if its been said... But I read through this thing a while ago...

basicly it comes down to EL headers give more power... but kill your growl...
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Old 09-18-2007, 11:55 AM   #712
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and the 4-2-1 give you a little more power on bottom end but not as much top end and vise versa for the 4-1.
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Old 11-27-2007, 10:54 AM   #713
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Quote:
Originally Posted by IllNastyImpreza View Post
basicly it comes down to EL headers give more power...
Would there be any different outcome with an aftermarket turbine?
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Old 11-27-2007, 12:09 PM   #714
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well thats a whole different catagory. a header will complement the gains from a bigger turbo or a turbo that spools faster. basically the header is a bigger pipe then the stock part and it has more gradual bends, its a hell of a lot smoother... it just gives better flow, which in turn helps the turbo spool a little faster
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Old 11-27-2007, 09:04 PM   #715
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Quote:
Originally Posted by romanlynch View Post
well thats a whole different catagory. a header will complement the gains from a bigger turbo or a turbo that spools faster. basically the header is a bigger pipe then the stock part and it has more gradual bends, its a hell of a lot smoother... it just gives better flow, which in turn helps the turbo spool a little faster
The thing is that I have a Prova 4-1 header and a fujitsubo(or hks ,not sure) equal length header sitting in my garage. I just wanted to know which one is better or,let me rephrase that....which one gives you more power mid to high range?
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Old 11-28-2007, 12:40 PM   #716
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well as stated above the fuji is about 12hp, if they are both 4-1 then they will give you a little more power mid-top then a 4-2-1 would. either way they are both an improvement over stock.

the el header is 'better' then the unequal length for some reason that escapes me at the moment, maybe someone can fill in the blank
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Old 11-28-2007, 01:21 PM   #717
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Quote:
Originally Posted by romanlynch View Post

the el header is 'better' then the unequal length
Is this everywhere in the powerband?
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Old 11-28-2007, 02:34 PM   #718
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The Fujitsubo did have a very nice gain almost all the way across the power band.
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Old 11-28-2007, 04:43 PM   #719
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Dylan, what are your thoughts on the HKS header?
Better stuff for the dollar? they seem like a nice piece, granted i am sure they are not worth the cost of admission new. Used though...
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Old 11-28-2007, 09:09 PM   #720
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Quote:
Originally Posted by downshift1 View Post
The Fujitsubo did have a very nice gain almost all the way across the power band.
equal length?
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Old 12-04-2007, 12:28 PM   #721
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kike_ej20- If they aren't i would say very close to equal length.

Dr.Nick- HKS are nice but no better than the Borla/Gruppe-S/etc. that all use the same style and tube diameter.

Dylan
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Old 01-29-2008, 09:02 PM   #722
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since it can't really be seen from the summary post...what is the best Unequal length gainer
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Old 01-29-2008, 10:27 PM   #723
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Quote:
Originally Posted by Chapel View Post
so, after all that, the charts don't link anymore... and the website is dead and there's nothing about it on the new website...
Are you and all the others whining about dead links serious?

You ressurrected a thread started over 4 years ago that hadn't been active for close to 3 years at the time of your posting.

A mod should have locked it for necromancy 9 months ago when you posted.
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Old 01-29-2008, 10:31 PM   #724
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Quote:
Originally Posted by turboICE View Post
Are you and all the others whining about dead links serious?

You ressurrected a thread started over 4 years ago that hadn't been active for close to 3 years at the time of your posting.

A mod should have locked it for necromancy 9 months ago when you posted.
What you say is true...it is unrealistic to expect this thread to still have live pictures...HOWEVER...where would you have us find a good collection of tested information...since there seems to be a clusterf*ck of information if you try and search for it...
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Old 01-29-2008, 10:38 PM   #725
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here is the link to the magazine article:
http://wrx.grapon.com/exhaust/headers/wrxheadertest.pdf

and here are high-res versions of the charts (colorblind people go find some crayons)
http://wrx.grapon.com/exhaust/headers/Boost2.jpg
http://wrx.grapon.com/exhaust/headers/Boost4.jpg
http://wrx.grapon.com/exhaust/headers/Overall2.jpg
http://wrx.grapon.com/exhaust/headers/Overall4.jpg

And here is another independent test of various exhaust manifolding and headers:
http://forums.nasioc.com/forums/show...ghlight=header
along with his high-res results:
http://wrx.grapon.com/exhaust/header...omparo-SAE.jpg
http://wrx.grapon.com/exhaust/header...ll-Comparo.jpg

Now let this thread die again.
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