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  #13  
Old 12-24-2011, 11:20 PM
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Re: volant or k&n intake for wk2 hemi?

Is the stock intake system very restrictive? If not, would the linked drop in K&N filter offer any increase in performance?
http://www.knfilters.com/search/prod...x?Prod=33-2457
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Old 12-25-2011, 11:40 AM
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Re: volant or k&n intake for wk2 hemi?

The stock intake flows plenty of air for the stock engine, stock headers, stock cats, stock exhaust, and most importantly, stock ECU. Just increasing intake air volume without modifying most of the above components will not yield more power.

As for drop in K&N filters, let me just say this - never underestimate the power of marketing.
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Old 12-25-2011, 12:33 PM
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Re: volant or k&n intake for wk2 hemi?

its not just air volume but air volocity. And mods start somewhere, Volant is a great start.
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Old 12-25-2011, 12:49 PM
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Re: volant or k&n intake for wk2 hemi?

Quote:
Originally Posted by JGCCAYENNE View Post
The stock intake flows plenty of air for the stock engine, stock headers, stock cats, stock exhaust, and most importantly, stock ECU. Just increasing intake air volume without modifying most of the above components will not yield more power.

As for drop in K&N filters, let me just say this - never underestimate the power of marketing.
The exhaust headers in my 2010 Challenger 5.7 engine are very restrictive and the air box isn't to far behind. Many people throw a CAI on or add SRT headers and air box, and the difference is night and day. I'm new with the 5.7 setup in my JGC, but I can say it feels asthmatic and/or extremely detuned in comparison. I'd be surprised if the same headers and/or air box aren't common to both vehicles to keep costs down.
The 6.4 engine in my 2011 SRT Challenger is another story altogether. I wish the SRT version of this car wasn't another $20,000 over the model. I've got to add some life back into this engine because I know what it's capable of. I'd hoped a K&N drop in would be a good place to start. Maybe you're right about marketing hype. I can't really say for sure, since most people don't dyno JGC's before and after mods to prove any benefit.
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Old 12-25-2011, 03:44 PM
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Re: volant or k&n intake for wk2 hemi?

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Originally Posted by wjs81866 View Post
its not just air volume but air volocity. And mods start somewhere, Volant is a great start.
It is not air velocity. It is the increase in static air pressure in the intake manifold.

If you add headers, exhaust, and a new intake, and then tune the ECU, you will see an increase in power. Just changing the intake without touching anything else is useless.
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Old 12-25-2011, 04:03 PM
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Re: volant or k&n intake for wk2 hemi?

Quote:
Originally Posted by USponycar View Post
The exhaust headers in my 2010 Challenger 5.7 engine are very restrictive and the air box isn't to far behind. Many people throw a CAI on or add SRT headers and air box, and the difference is night and day. I'm new with the 5.7 setup in my JGC, but I can say it feels asthmatic and/or extremely detuned in comparison. I'd be surprised if the same headers and/or air box aren't common to both vehicles to keep costs down.
The 6.4 engine in my 2011 SRT Challenger is another story altogether. I wish the SRT version of this car wasn't another $20,000 over the model. I've got to add some life back into this engine because I know what it's capable of. I'd hoped a K&N drop in would be a good place to start. Maybe you're right about marketing hype. I can't really say for sure, since most people don't dyno JGC's before and after mods to prove any benefit.
I agree with you on the SRT models. That extra $20K buys you exactly what you described, and a whole lot more, including monster Brembo brakes. Also, the JGC V8 4x4 weighs about 1100 LBS more than the Challenger. Ask four of your biggest friends to ride with you in the Challenger. It will feel very different. In addition, the full time 4x4 system has more drivetrain losses compared to a RWD setup, reducing power to the wheels.

Why not buy a Boss 302 and keep the JGC stock? The 5.0 is an incredible engine.
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Old 12-25-2011, 05:09 PM
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Re: volant or k&n intake for wk2 hemi?

You will not get anything from a drop in filter except that you will need to justify the $$ spent by claiming the Jeep runs better. The volant CAI unit, probably the best one out there at the moment, will provide a bit of sound, perhaps slightly better throttle response, but no real power. The ECU detunes this motor quite a bit from its potential. The oil from K&N filters can gunk up sensors if not done right.
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Old 12-25-2011, 06:45 PM
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A Bit Off Topic

[QUOTE Why not buy a Boss 302 and keep the JGC stock? The 5.0 is an incredible engine.[/QUOTE]

I could have bought a Boss 302 instead of buying my SRT8 392 but I don't regret my decision one bit. The Challenger is my daily driver for decent weather and the Jeep is for everything else. To go from either one of these to a stock GC is just not going to cut it, which is one reason I'm here. Looks like there's no cheap way out of adding power, but the potential is there with a power adder. I'm aware tuners are still trying to crack the PCM just like my SRT. I'll be ready when they do.
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Old 12-25-2011, 08:15 PM
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Re: volant or k&n intake for wk2 hemi?

Quote:
Originally Posted by JGCCAYENNE View Post
The stock intake flows plenty of air for the stock engine, stock headers, stock cats, stock exhaust, and most importantly, stock ECU. Just increasing intake air volume without modifying most of the above components will not yield more power.

As for drop in K&N filters, let me just say this - never underestimate the power of marketing.

I don't have any material to back this up but I'd like to agree with you. However, I do like the idea of a reusable dry filter whether it adds more power or not. At 290 though, I don't know that anyone really needs that extra 5 horses or that it would matter much.
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Old 12-26-2011, 11:16 AM
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Re: volant or k&n intake for wk2 hemi?

Quote:
Originally Posted by ColdCase View Post
You will not get anything from a drop in filter except that you will need to justify the $$ spent by claiming the Jeep runs better.
and gets better mileage, shifts better, sounds better, improves your sex life...

Quote:
Originally Posted by kazak View Post
I don't have any material to back this up but I'd like to agree with you. However, I do like the idea of a reusable dry filter whether it adds more power or not. At 290 though, I don't know that anyone really needs that extra 5 horses or that it would matter much.
You are correct. Five hp (if you believe the marketing hype) on a 5000 LB vehicle is like a gnat on an elephant's ass.
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Old 12-31-2011, 03:44 PM
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Re: volant or k&n intake for wk2 hemi?

I recently purchased a 2012 JGC Overland 5.7 L. I am interested in a CAI but I am worried that it will void the warranty on the engine. I also heard that if the CAI is vehicle specific, then it will not void the warranty? Can any of you please confirm or deny this?

If it does void warranty, should I wait for the Mopar CAI for the 2012 5.7 to be released and if so is it true that since it is Mopar, it would not void the jeep warranty and/or extended warranty.

Thank in advance!
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