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Old 05-03-2006, 10:53 PM   #26
SilverSurfer04STi
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Quote:
Originally Posted by jetfan8178
I found it...Jeez...Type a search and get pics of everything except what I wanted LOL
Yeah, it's buried pretty deep in that thread (page 6 or 7 IIRC) and also in the Official Perrin Performance Q&A Thread (page 40 - post 990 IIRC)...
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Last edited by SilverSurfer04STi; 05-03-2006 at 10:59 PM.
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Old 05-03-2006, 11:19 PM   #27
RainMaker
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Quote:
Originally Posted by SilverSurfer04STi
Back on track, Rainmaker, I thought when you did your testing/dyno session wiht the Perrin headers that they were not coated yet. Is that correct? Please verify as that would make even more of a difference.
The headers that we tested were not coated or wrapped. They were as they come from the factory for the advertised price.

-chris
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Old 05-04-2006, 12:22 AM   #28
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Great work and Jeff should be helping you out with money for testing since you probably sold a bunch of headers for him.
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Old 05-04-2006, 11:07 AM   #29
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Quote:
Originally Posted by silver arrow
Great work and Jeff should be helping you out with money for testing since you probably sold a bunch of headers for him.
Nah. The motto should be "Design good parts, and they will come." Rather than contribute money (its almost totally covered), perhaps he (and others) will design great parts seeing that success and sales is a function of the part making great power for a good price.
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Old 05-04-2006, 12:09 PM   #30
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Hey all, Im seeling the Crucial/Injen setup and the IOTA setup here:
http://forums.nasioc.com/forums/showthread.php?t=997456
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Old 05-04-2006, 02:34 PM   #31
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Is it possible if we can get a sound clip of the Perrin Headers. I really wanna hear what the car sounds at idle, at cruising and at WOT.
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Old 05-04-2006, 03:02 PM   #32
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I have a couple of questions also. What would be the benefit of coating the perrin headers. Second this is off topic and may sound newbish but whats the difference between the a cross-over pipe and up-pipe and why not add the injen cross over pipe to the perrin headers?
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Old 05-04-2006, 03:22 PM   #33
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Quote:
Originally Posted by innova
Man, where can you buy the Perrin header? I can't find it on their site.


Edit, saw that it is new and not readily avalible quite yet.


$700 seems like a lot for some tubing, but if it gains 30whp it would be worth it..


I want somebody to review the $150 ebay headers
this place

https://cvrmotorsports.com/view_prod...ct=PSP-EXT-050

or jcspeed
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Old 05-04-2006, 03:40 PM   #34
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I just have a few questions:

Was the perrin re-tested or where these the results from the last test. Before, you said though it appeared to spool sooner on the dyno, the stock headers spooled faster on the street. It would probably be better to use a dyno that can better similar load of the street. It just seems a little wierd, but I can understand how without load the perrins will spool faster because it's optimizing exhaust pulses, but under load the narrow diameter of the stock headers + heat retention = better overall response.
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Old 05-04-2006, 05:02 PM   #35
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This reminds me of the last header comparo. A dyno sheet with a bunch of impossible to follow lines criss crossing each other. I commend you guys for the effort but you might as well go the final mile and compile the data a little better.
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Old 05-04-2006, 05:28 PM   #36
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why was the stock header pull so lean <3k rpms?
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Old 05-04-2006, 05:54 PM   #37
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Quote:
Originally Posted by santofontana
This reminds me of the last header comparo. A dyno sheet with a bunch of impossible to follow lines criss crossing each other. I commend you guys for the effort but you might as well go the final mile and compile the data a little better.
Please see http://forums.nasioc.com/forums/showthread.php?t=974977
for a comprehensive dyno of each set-up vs. each other. There are alot of pages in there to go through, but everything is in there except individual graphs for the Un-equal length Gruppe-S dynos. I have those at

http://www.nolke.com/pics/ at the bottom.

I agree its a little "jumbled", but any pair of dyno results can be provided and has been in the previous thread or in that directory.

All in all, theres logs, comparisons of every possible pair, and minimal interpretation. That way you can choose comprehensive and long (the other thread that you missed) or short and crowded. I sure hope that that's enough for you

-Chris
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Old 05-04-2006, 05:59 PM   #38
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Quote:
Originally Posted by Shabib67
I have a couple of questions also. What would be the benefit of coating the perrin headers. Second this is off topic and may sound newbish but whats the difference between the a cross-over pipe and up-pipe and why not add the injen cross over pipe to the perrin headers?
Coating the Perrin headers keeps heat in the exhaust. Hot air can preserve the velocity of the original exhaust pulse and scavenge the cylinder more thoroughly on the next combustion cycle.
It also keeps your engine bay cooler.

A cross-pipe fits between the two sides of the manifolds. A up-pipe leads from one of the manifolds to the turbocharger.
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Old 05-04-2006, 06:07 PM   #39
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Quote:
Originally Posted by RainMaker
A cross-pipe fits between the two sides of the manifolds. A up-pipe leads from one of the manifolds to the turbocharger.
So would adding a injen crossover pipe to the perrin headers have any benefits.
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Old 05-04-2006, 06:07 PM   #40
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Quote:
Originally Posted by mnavarro
I just have a few questions:

Was the perrin re-tested or where these the results from the last test. Before, you said though it appeared to spool sooner on the dyno, the stock headers spooled faster on the street. It would probably be better to use a dyno that can better similar load of the street. It just seems a little wierd, but I can understand how without load the perrins will spool faster because it's optimizing exhaust pulses, but under load the narrow diameter of the stock headers + heat retention = better overall response.
We logged on the street to give the most objective "spool" information. We dyno'd on the dyno to give the most objective power output information. A dyno that can accurately simulate the street (for spool-up) is a hard animal to catch, and even when isoltated, its even harder to prove you ever had it.

On the other hand, Im not necessarily willing to concede that the norrow stock exhaust path offers the best "response". If you graph in excel the rpm-v-boost and the rpm-v-MAF throughput, you see that while the stock or ported manifolds "hit harder" with greater boost, the Perrins seem to be ingesting air more quickly. Boost in isolation does not equal power or acceleration. Boost merely stuffs more air in a cylinder. If there is a greater volumetric efficiency and better scavenging thanks to a better pulse design, you may not need as much boost to make the same power.

I never tried to say it was simple
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Old 05-04-2006, 06:08 PM   #41
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Quote:
Originally Posted by Shabib67
So would adding a injen crossover pipe to the perrin headers have any benefits.
You cant. The "crosspipe" function is fulfilled by part of the header in these header designs.
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Old 05-04-2006, 06:09 PM   #42
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Quote:
Originally Posted by ride5000
why was the stock header pull so lean <3k rpms?
I actually don't know. Within reason... staying lean until the boost really hits helps spool... but I have no idea whether its below or above that optimal point there.
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Old 05-04-2006, 06:34 PM   #43
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Yes they are not on our site right now. The whole site is being revamped right now. Anyway check with our dealers as we have been shipping them for about a month now. Our retail price is $780 also.

http://www.perrinperformance.com/dealers/index.htm
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Old 05-04-2006, 06:48 PM   #44
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15 Perrin Headers instock at JSC Speed- Let me know if you need one or two- Thanks Kyle

http://www.jscspeed.com/wrx/exhaust/perrin_header.htm
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Old 05-04-2006, 06:54 PM   #45
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will all of these headers fit the 2005+ Legacy GT?
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Old 05-04-2006, 07:28 PM   #46
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I think you have to have an STi oil pan for the Perrin Equal Length headers (rumor is, they are $80). Otherwise, I think they all fit.
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Old 05-04-2006, 08:48 PM   #47
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Sure do fit the LGT! Any 2.5 turbo motor has the right pan.
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Old 05-04-2006, 09:27 PM   #48
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Quote:
Originally Posted by JSC Speed
15 Perrin Headers instock at JSC Speed- Let me know if you need one or two- Thanks Kyle

http://www.jscspeed.com/wrx/exhaust/perrin_header.htm
I needed one.. and got one! Thanks Kyle
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Old 05-05-2006, 01:00 AM   #49
RainMaker
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Holy cow. If eleventy billion people buy headers and ported manifolds now, I better get GreggPDX some stickers for all that work
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Old 05-05-2006, 10:26 AM   #50
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Is it possible if we can get a sound clip or video clip of the perrin headers in action.
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