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Old 03-19-2006, 03:09 AM   #1
Mechkiller31st
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Default Looking for dyno proven Exhaust gains

I am doing a full write up for the L owners. I am looking for dyno Charts that prove the gains of the exhuast over stock exhuast. I dont care which exhuast you have or if you have the 1.8L, 2.2L or the 2.5L I just wish to see what some of the gains have been.
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Old 03-19-2006, 08:07 AM   #2
Patrick Olsen
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Too bad it's impossible to search for "dyno AND exhaust AND graph".

Wait, what's that?? It's not impossible? You mean to tell me there's a search engine actually built into this forum?!? Oooo schnapp!
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Old 03-19-2006, 11:16 AM   #3
Mechkiller31st
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vBulletin Message
Sorry - no matches. Please try some different terms.


It is always interesting to me how there are those in the subaru commnunity that will simply show what a person is looking for if they have it and if they dont have it they just keep quite. there are also in this community that appear to be here just to say they own a subaru and are part of the community but when someone asks for just a little bit of info they see that it is their duty to inform the poster of the forums search engine not taking into thought that most likely the poster has already used it.
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Old 03-19-2006, 12:20 PM   #4
LetItSnow
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Gotta work on that search button technique, fella. I just checked it out, and there are heaps of threads, including many in Proven Power Bragging.

Keep in mind that there are also plenty of slobs that haul up with a question with no concept of the search button who expect that somebody else can do their homework for them.

Don't dump on Pat... he's not a local tool by any means, and he gave you the search criteria to use to find your answers.
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Old 03-19-2006, 02:06 PM   #5
FalconRS
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I'm going to go ahead and quote myself from just a couple days ago on a similar topic....

Quote:
Originally Posted by FalconRS
A catback is a catback is a catback. All aftermarket catbacks of similar pipe diameter will make the same power, within probably a quarter of a horsepower of each other, which is a margin so small no dyno can reliably measure it. So your choice is really from the different sizes of pipe available, and after that, if you don't care about sound, the decision is based on price.

For a smooth all-around powerband, a 2.25" catback is the best choice. Most n/a-specific catbacks are 2.25". A 2.5" catback will soften your low end but will perform better close to redline. 2.5" is generally considered "too big" for all but the craziest n/a builds. The OBX/Rallitek catback I believe is a 2.5" catback, Cobb may be as well.
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Old 03-19-2006, 05:58 PM   #6
LetItSnow
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The decision should get beyond price, however... material matters, as does reputation. Exhaust components that are likely to crack (Borla headers have a bad rep for this) are often worth the extra few bucks to step up from. As well, since I live in a Super Size my Salt Street zone, stainless was key for me. There's also the availability factor, but this is getting a little off topic.
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Old 03-19-2006, 07:09 PM   #7
Patrick Olsen
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Quote:
Originally Posted by Mechkiller31st
vBulletin Message
Sorry - no matches. Please try some different terms.


It is always interesting to me how there are those in the subaru commnunity that will simply show what a person is looking for if they have it and if they dont have it they just keep quite [sic]. there are also in this community that appear to be here just to say they own a subaru and are part of the community but when someone asks for just a little bit of info they see that it is their duty to inform the poster of the forums search engine not taking into thought that most likely the poster has already used it.
Well, I can't explain your apparent inability to use the search engine. When I type in the EXACT words I told you to type in, I got 28 results in this forum alone. I even did the search before I posted my smart-ass reply, just to be sure that any idiot should have been able to find this information on their own. Here, take a look - http://forums.nasioc.com/forums/sear...archid=4133992 (not sure if you can call up my search, but if you can, there's the results). As LetItSnow pointed out, I'm sure there are more in the Proven Power forum. I knew that search would work, because my own dyno results are in there.

Pat Olsen
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5800 posts in the past 6-1/2 years, all just to tell people how to use the search engine...
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Old 03-19-2006, 08:01 PM   #8
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Quote:
Originally Posted by Patrick Olsen
5800 posts in the past 6-1/2 years, all just to tell people how to use the search engine...
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Old 03-19-2006, 08:59 PM   #9
Kevin Thomas
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Guys,

I am actually having trouble finding a before and after exhaust comparo on a dyno. If Mech is looking for stock vs only an exhaust added (Not header), the search will even be harder. It would be nice to find dynos with base dyno and then cat back exhaust. I will continue looking but it wasn't easy the first few searches I used. Usually people have a few other mods done before getting dyno results, not just a cat back exhaust. Even if you had an intake dyno'd then added an exhaust an dyno'd again, that could still be used. It just seems difficult to find a before and after cat back exhaust dyno.

I have dyno'd one of my XT6s before and after with just an exhaust done. The exhaust was the first mod done. This isn't what you are looking for even though it is a Subaru.

Edit: Found this but it is out of date. Link broken..
http://forums.nasioc.com/forums/show...+exhaust+graph

My XT6 I was talking about. Dyno'd stock, with dynomax exhaust, then with intake and pulley added. I have another dyno with ignition advanced 10 degrees but who cares right?
Subaru XT6 Exhaut Dyno

Pat's Dyno
Pat Olsen's Dyno

Last edited by Kevin Thomas; 03-19-2006 at 09:09 PM.
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Old 03-19-2006, 09:17 PM   #10
Kevin Thomas
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MechKiller,

I see you are doing a write-up on things dyno'd in general and not just the exhaust. I saw you bumped up the Ebay intake thread, so I won't include that here.

Haven't did a lot of dynoing in my Outback Sport since I had the majority of mods done before finding the dyno shop I was going to. You may include my ECU shootout where I tested two different versions of 2.2ltr ECUs and a 1999 2.5ltr Legacy GT ECU.
ECU Shootout
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Old 03-20-2006, 01:24 PM   #11
Mechkiller31st
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thank you kevin. I am doing a write-up mainly for those of us with the 2.2L motor. Im going to do my best and spend as much as i can putting parts into my car and doing before and after dyno's to show if the mod is worth the money or not. I am doing this to try and put some of the threads that are in question to rest. Basically i am doing what Unabomber does except im doing it on all the parts not just one at a time even though i have read alot of Unabombers stuff and feel that can erasialy be made into a book. again i thank you Kevin if you have any other info that would be great I will use that dyno of the exhuast and everything else it will help.

Now I am not saying im lazy I have used the search and came up with results and io have read the majority of the results up until 4 AM It is hard to find actual charts. Most of what i get are Butt dyno results There are a few i get of people just putting up "i dyno'd it and gained XX HP from it" but they never show the charts. If i am going to do this write up I need hard fascts so everyone can see what the part gains you what it might loose you. and in the end is it worth it to mod the 2.2L and then go turbo becasue you dont make much money so a slow build up will be best or should one with our engine just save thewir pennies and do a swap.
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