Avenger SC: My Version of Stage II - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 41 Old 09-21-2010, 10:21 AM Thread Starter
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Avenger SC: My Version of Stage II

I should have posted this a long time ago but havenít gotten around to it.
I was the first to get the new version of the Avenger supercharger system a while back (https://www.jkowners.com/forum/showthread.php?t=23204) and wanted to see how much more I can get out of it.
The game plan was to get a smaller pulley and make a little more boost with it. I got a 3 inch diameter pulley which is 3/8 inch smaller than the one that comes with the kit. You can see a side by side comparison of the two below. The one in my hand is the stock pulley that comes with the kit.

We decided that before we throw more boost at the engine, we should alleviate some of the back pressure. The stock headers on 08 wranglers have 4 cats and look pretty restrictive so I opted for the Borla long tube headers. These donít have cats which isnít an issue here in Colorado Springs since we donít have emissions tests. Anyway, I am using them for test purposes only . Here are some pics:



To protect the spark plug wires, we got some wire boots:


We dynoed just the headers and learned a very shocking fact (shocking to me, since I spent all that $$). The 3.8 likes back pressures. We lost 10 wheel horsepower with the Borla headers. We dynoed it with and without the stock muffler and saw the same numbers.
I emailed Borla several times and never got a response. Overall, I am not satisfied with them and would not recommend these headers. The inside welds were not very clean and they come with felt gaskets which are now leaking .
Throwing the smaller pulley on added ~2.5 pounds of boost on average. The extra boost added 13hp and 28tq as measured at the wheels. The dyno graph below shows my stock numbers (pink), stock Avenger numbers (Red), and my new numbers (black). Stage 2 increased my horsepower by ~8% and torque by 14% over the Avenger kit and brought by total gains up to 68% in hp and 78% in torque over stock.
Dotted lines = torque
Solid lines = HP


P.S.
I have one more power adder that I have done which I will start another thread on.
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post #2 of 41 Old 09-21-2010, 11:05 AM
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Nice simple mod for significant results. RIPP is still better!

Doesn't it suck that Borla would put a product on the market that actually takes away power? All our vendors should drop Borla's shitty headers from their inventory.

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OKAY FUCKMOUTH.
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post #3 of 41 Old 09-21-2010, 11:11 AM Thread Starter
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Nice simple mod for significant results. RIPP is still better!
I wouldnt run ripp products even if they paid me to. Avenger makes the power where it belongs on a JK and Jack doesnt inflate numbers in the name of sales.


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Doesn't it suck that Borla would put a product on the market that actually takes away power? All our vendors should drop Borla's shitty headers from their inventory.
Yeah Borla definately dropped the ball on this one. I guess they dont see enough revenue potenial in the JK market to invest in some real R&D. I just wish they would step up considering the price tag of those headers.
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post #4 of 41 Old 09-21-2010, 11:21 AM
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Thanks for sharing and also thank you for taking off emissions equipment because we need more smog.

Jason
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post #5 of 41 Old 09-21-2010, 12:07 PM
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I wouldnt run ripp products even if they paid me to. Avenger makes the power where it belongs on a JK and Jack doesnt inflate numbers in the name of sales.
I was just kidding with ya. I know you are a big supporter of Avenger's product.

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OKAY FUCKMOUTH.
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post #6 of 41 Old 09-21-2010, 12:13 PM
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Thanks for sharing and also thank you for taking off emissions equipment because we need more smog.
Don't be jealous because your state has a bunch of tight-ass laws.

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Confucius say "If you no want break axle, Drive with BIG head not LITTLE head"
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post #7 of 41 Old 09-21-2010, 01:08 PM
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Don't be jealous because your state has a bunch of tight-ass laws.
Jealous of what? The horsepower you don't make (or the couple you might) by taking the cats off and contributing to that beautiful brown layer of smog....

Denver...


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post #8 of 41 Old 09-21-2010, 01:12 PM Thread Starter
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Jealous of what? The horsepower you don't make (or the couple you might) by taking the cats off and contributing to that beautiful brown layer of smog....

Denver...
Denver has a denser population so it has emissions. Colorado Springs is ~1000 feet higher in elevation and has significantly fewer cars so it does not.

P.S.
That picture is nothing. I am from NYC.
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post #9 of 41 Old 09-21-2010, 07:32 PM
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Denver has a denser population so it has emissions. Colorado Springs is ~1000 feet higher in elevation and has significantly fewer cars so it does not.

P.S.
That picture is nothing. I am from NYC.
Oh I know all about brown air, I live near LA. I just grabbed the first smog colorado pic.

Jason
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post #10 of 41 Old 09-21-2010, 08:01 PM
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225 ftlb thats a nice number. sweet system

cant believe the borla headers lost 10 hp bull
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post #11 of 41 Old 09-21-2010, 08:27 PM
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Great info. Thanks.
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post #12 of 41 Old 09-21-2010, 08:49 PM
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Did you completely change the tune in addition to the pulley? I think I'll be needing stage II.
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post #13 of 41 Old 09-21-2010, 09:32 PM
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Quote:
Originally Posted by BBirish View Post
225 ftlb thats a nice number. sweet system

cant believe the borla headers lost 10 hp bull
I wonder how it would do with the new RIPP headers that I want to get so bad I can taste them. mmm mmm....metal and exhaust.

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post #14 of 41 Old 09-22-2010, 02:00 PM
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Thanks for sharing and also thank you for taking off emissions equipment because we need more smog.
LOL. Amen, brother.

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post #15 of 41 Old 09-22-2010, 04:47 PM
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Thanks for sharing and also thank you for taking off emissions equipment because we need more smog.
+1 We all love polluting and giving our sport a bad name.
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post #16 of 41 Old 09-22-2010, 06:16 PM
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Jeep doesn't have to mean redneck. Thanks for perpetuating the stereotype though.
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post #17 of 41 Old 09-22-2010, 06:44 PM
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Is this a Jeep Forum?


Damn, I didn't realize that being a jeep owner meant I wasn't supposed to enjoy clean air. My bad.

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post #18 of 41 Old 09-22-2010, 06:47 PM
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225 ftlb thats a nice number. sweet system

cant believe the borla headers lost 10 hp bull
I'm liking 417 ft/lb that is in the near future
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post #19 of 41 Old 09-22-2010, 06:50 PM
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So if you wheel an old-school classic, or a custom buggy
Old school classics didn't have emission's equipment, and buggies aren't driving down the highway.

Jason
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post #20 of 41 Old 09-22-2010, 07:01 PM
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What's the difference between driving on the highway or on a trail? Your emmissions go up in the air either way.
Are you serious
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post #21 of 41 Old 09-22-2010, 07:09 PM
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If I get on the gas of my f250 I leave a 200 foot trail of black smoke, I think alasha not having cats on his jeep isn't a big deal
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post #22 of 41 Old 09-22-2010, 07:10 PM
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What's the difference between driving on the highway or on a trail?
about 70mph.

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post #23 of 41 Old 09-22-2010, 07:45 PM
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Quote:
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What's the difference between driving on the highway or on a trail? Your emmissions go up in the air either way.
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about 70mph.


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A Jeep just zipped past my house and I could swear I heard the driver yellin:

"The tkob is coming!! The tkob is coming!!"
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post #24 of 41 Old 09-22-2010, 07:45 PM
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This thread sure has gone to S H I T ! !

"I won't be wronged, I won't be insulted, and I won't be laid a hand on. I don't do these things to other people, and I require the same from them." John Wayne - The Shootist


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post #25 of 41 Old 09-22-2010, 07:59 PM
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Quote:
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If I get on the gas of my f250 I leave a 200 foot trail of black smoke, I think alasha not having cats on his jeep isn't a big deal
Kinda my point.


END HIJACK! CLEANING UP THE THREAD.
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