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Old 06-21-2004, 04:28 PM   #626
Diversion
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Quote:
Originally posted by AaronWRX
Because dyno time is expensive and in demand for other things.
Huh? Every dyno generates numbers. That's a weaksauce excuse if I ever read one.
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Old 06-21-2004, 04:41 PM   #627
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Have you simply considered calling or emailing S3? heh

Jorge (RiftsWRX)
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Old 06-21-2004, 05:41 PM   #628
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Quote:
Originally posted by Diversion
Huh? Every dyno generates numbers. That's a weaksauce excuse if I ever read one.
And thoes numbers mean little... they can be close but exact numbers wont help as much as looking at the curve will. Dynos lie.
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Old 06-21-2004, 05:44 PM   #629
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Quote:
Originally posted by totoherbs
And thoes numbers mean little... they can be close but exact numbers wont help as much as looking at the curve will. Dynos lie.
In this case though, it'd at least help us translate the graph. Even with the browser maximized and the screen at 1152x768 it's still pretty difficult to read, whereas a simple 2-column table would be really easy to read. Combine a table with the graph and it's suddenly easy to comprehend.

john
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Old 06-21-2004, 09:59 PM   #630
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Quote:
Originally posted by ButtDyno
In this case though, it'd at least help us translate the graph. Even with the browser maximized and the screen at 1152x768 it's still pretty difficult to read, whereas a simple 2-column table would be really easy to read. Combine a table with the graph and it's suddenly easy to comprehend.

john
^^^ That's what i'm screaming.. ANYTHING legible would be much appreciated.. I can't even make out what a GTSpec2 header does AT ALL.. ZERO.. Most of it's performance is covered up by who knows on EVERY chart.
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Old 06-21-2004, 10:00 PM   #631
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where'd you get the mag jay?
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Old 06-21-2004, 10:10 PM   #632
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Are the graphs any better in the magazine? It may be worthwhile to pick up a copy if they are (and you haven't already).
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Old 06-22-2004, 01:07 AM   #633
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Talk about anticlimactic.
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Old 06-22-2004, 07:03 AM   #634
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I don't have the mag, the header comparo is on S3's website.

Jay
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Old 06-22-2004, 11:18 AM   #635
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Quote:
Originally posted by RiftsWRX
Have you simply considered calling or emailing S3? heh

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Old 06-22-2004, 11:48 AM   #636
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link?
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Old 06-24-2004, 05:41 PM   #637
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Old 06-24-2004, 05:42 PM   #638
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Much better! Thanks

john
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Old 06-24-2004, 05:47 PM   #639
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So for us people stuck with a POS monitor and/or color blindness can we have a bloody excel spreadsheet of the numbers. Thanks
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Old 06-24-2004, 06:57 PM   #640
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Money for am STi but not for a decent monitor.......

I thought you were gonna test the stone mountain headers and the port matched stocker. or am I missing something.
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Old 06-24-2004, 07:34 PM   #641
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I'm at work, and they believe in recycling. This monitor has been recycled through the "spare" bin many a time from the look of it.
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Old 06-25-2004, 05:23 PM   #642
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Quote:
Originally posted by XT6Wagon
So for us people stuck with a POS monitor and/or color blindness can we have a bloody excel spreadsheet of the numbers. Thanks
no reason to get upset there fella
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Old 06-25-2004, 05:51 PM   #643
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iam glad cusco did pretty good.. i was hopeing i didnt waste 1k for nothing..
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Old 06-26-2004, 12:43 AM   #644
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Default stock UP diameter

whats the stock wrx uppipe ID ?
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Old 06-26-2004, 09:29 AM   #645
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Default Re: stock UP diameter

Quote:
Originally posted by IllNastyImpreza
whats the stock wrx uppipe ID ?
Roughly 38mm at the manifold, expanding to over 50mm at the cat, then tapering down to 45mm at the turbo inlet.

FSU
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Old 06-26-2004, 09:35 AM   #646
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IMO, the only conclusive data is that higher boost corresponds to more HP/TQ.

Based on the data, I did not see any significant advantage of headers over OE exhaust manifolds.
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Old 06-26-2004, 11:26 AM   #647
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Quote:
Originally posted by SpeedStyleSound
Here are links to monster versions of the graphs...

http://www.s3mag.com/Overall2.jpg
http://www.s3mag.com/Boost2.jpg
http://www.s3mag.com/Overall4.jpg
http://www.s3mag.com/Boost4.jpg

Dialup beware...
Thanks for those graphs, those make it alot easier to make the comparisons. However, a detailed data table would be the best......pretty please?

FSU
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Old 06-26-2004, 01:44 PM   #648
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Quote:
Originally posted by Richard Sierra
IMO, the only conclusive data is that higher boost corresponds to more HP/TQ.

Based on the data, I did not see any significant advantage of headers over OE exhaust manifolds.
Where did you come to this conclusion? At least on the stage 2 car, most of the headers are in the same boost range; the fujitsubo header has a bit more boost than the other aftermarket ones throughout the rpm range while the GTSpec Gen III had the most boost. The stock headers, minus the exception of the gtspec gen3, usually had the most boost. So, if anything, the aftermarket headers on the stage 2 car, minus the GTSpec gen3 and fujitsubo, had less boost than the stockers.
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Old 06-26-2004, 03:33 PM   #649
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Ok....I just spent a while looking at the stage 4 graphs. I'm going blind - really need a table.

The most interesting observation I can make is the relation of boost to power with some of the headers, especially over 6k rpm. The stockers were at 16 psi, roughly 1 psi more the others over 6k rpm, but still were shy 5-10 hp or so. However, at low rpms, the stockers are measure at up to 2 psi shy of the headers, and 20+ hp short. At around 5600 rpm's, where they are all around 15.75 psi, the stockers are still 15 hp shy.

Also, note the gt-spec gen 3 header's preformance relative to the boost, especially over 6k rpm's. It is at over 1 psi less than the stocker, and less than many others, but makes 15 hp over stock. The best top end. Also decent spool, is shy a bit of power in the low end, but the boost is noticeably lower there too, and that would explain it.

Huuummm......TABLE PLEASE!

Thanks,

FSU
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Old 06-26-2004, 03:43 PM   #650
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Quote:
Originally posted by STi FSU
Ok....I just spent a while looking at the stage 4 graphs. I'm going blind - really need a table.

Also, note the gt-spec gen 3 header's preformance relative to the boost, especially over 6k rpm's. It is at over 1 psi less than the stocker, and less than many others, but makes 15 hp over stock. The best top end. Also decent spool, is shy a bit of power in the low end, but the boost is noticeably lower there too, and that would explain it.


FSU
You know that is funny. On the stage 2 cars, the GTSpec gen3 is around 1.5psi MORE than the stockers past 6k rpms and makes like only 5hp more. It holds around 0.5-1psi more boost pretty much throughout the "meat and potatoes" portion of the rpm range too, and makes decent power compared to the stockers, but unfortunately the down-low portion on the stage2 car was very bad compared to the stockers/other headers. On the stage2, I think borla takes the win, while on the stage 4, borla clearly is one of the losers. GPmoto unfortunatley seemed to do subpar in both stage 2 and 4.

Last edited by Enigma76; 06-26-2004 at 03:48 PM.
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