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Discussion Starter #1
Having Magna Flow mufflers installed tomorrow on my Magnesium Pearl Charger R/T. Cutting the resonators off and running straight pipes from the mufflers. Gonna gain at least 15hp to 20hp. Next is the K&N Induction Kit for another 10hp to 20hp. Hoping to top out around 360 or 365HP.

Anyone already have the Magna Flow installed? or the K&N induction kit installed? Are my HP expectations accurate?
 

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Please post mp3s
 

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KurbyRTHemi said:
Having Magna Flow mufflers installed tomorrow on my Magnesium Pearl Charger R/T. Cutting the resonators off and running straight pipes from the mufflers. Gonna gain at least 15hp to 20hp. Next is the K&N Induction Kit for another 10hp to 20hp. Hoping to top out around 360 or 365HP.

Anyone already have the Magna Flow installed? or the K&N induction kit installed? Are my HP expectations accurate?

I would like to give you a bit of 411.. The HP & TQ numbers you are given from the box is a bunch of crap. If you think a CAI is going to give you anywhere near 20hp then your dreaming. I would guess in the 5-6hp range.
Exhaust depending on how restrictive the stock is, maybe 10-12 hp gained. Since the R/T already comes with 2.5" dual exhaust, you will not be getting any huge amounts of HP from a new cat back system.

I need to get under the R/T and SRT's to see what the headers look like. If the primarys are small than there might be some good HP gained by swapping in some larger jet hot coated SS ones and replacing the stock cats with high flow ones.
 

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Discussion Starter #6
Hey VSOP, I don't need a lecture, so lay off. I told you they were estimates, not facts.

It is a fact that removing the resonators and installing performance mufflers will indeed boost the horsepower. So do your lecturing to a wet behind the ears youngster.
 

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Whoa, Kirby, relax, where is this fact "proven" on this car? And the makers website does not count. I know a lot of young guys removed resonators on SRT-4s and got more noise, but no power.

And you DID ask if your HP estimates were accurate. And stated your gains like the were indeed facts. "Gonna gain at least"
 

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Discussion Starter #8
Car sounds real beastly now. The fabrication shop guy told me that removing the resonators and installing the magna flow mufflers would give an additional 10 to 15 HP, he's been doing fab work and exhaust systems for over 25 years. This was his first charger, but he done more than 25 Magnums. Any change that allows the exhaust system to push the gases out with minimal restriction is going to improve performance; even if only in the single digits.

As far as the K&N induction kit, this mod MAY only provide a maximum HP gain of 10hp, the engineer I spoke with at the Fab shop. The engineer stated that any horse power gains are going to be minimal unless I started playing with performance chips.
 

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Kurby, what was the cost of the exhaust mod? Did you get the complete Magnaflow Cat-Back exhaust system? How is the sound at cruising speeds?
 

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The LXforums crew actually bought a bunch of CAIs and dyno tested them back to back.

http://lxforums.com/board/showthread.php?t=14140

End result, no gains to be had.
Please download the raw data and review it. The HP readings did not change but the A/F ratio showed drastic changes.
Before the test it was decided to reset the computer between runs. I believe this makes the computer default to a rich condition for safety. I don't know how to prove it.

I dynoed my car with the stock intake twice and then with no intake twice (the intake face off "open air" test) and got an 18hp gain.
my dyno results
notice my AF got leaner when I removed the intake. (I unhooked the intake tube from the throttle body) The Intake face-off got richer, so there is something else going on in the face-off test.
The Hemi runs too rich to begin with.

KurbyRTHemi
Having Magna Flow mufflers installed tomorrow on my Magnesium Pearl Charger R/T. Cutting the resonators off and running straight pipes from the mufflers. Gonna gain at least 15hp to 20hp. Next is the K&N Induction Kit for another 10hp to 20hp. Hoping to top out around 360 or 365HP.
I wish you had dynoed the car before So the after numbers would show you the gains.
If you dyno your car after ($85 dollars for Dyno should be about right)
Please post the results and make sure you specify the correction factor. My numbers where SAE adjusted.
________
CollegeLuv live
 

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Discussion Starter #11
The cost was $278 for two replacement Magna Flow mufflers and removal of the two resonators. Removing or tampering with the catalytic converters will affect the warranty. Sounds like a beast, but when you are cruising down the highway you barely hear the pipes. But, when you mat the gas, that baby will really start talking.

I will post a video clip tomorrow.
 

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KurbyRTHemi said:
Hey VSOP, I don't need a lecture, so lay off. I told you they were estimates, not facts.

It is a fact that removing the resonators and installing performance mufflers will indeed boost the horsepower. So do your lecturing to a wet behind the ears youngster.

Well you might not be a wet behind the ears youngster, but you are very good at being a box lable racer..

Anyone will tell you what the product lists as gains is crap..

And the issue with dyno testing gains is that most dynos margin of error keep you from ever getting a true understanding of HP gains.

I would say a exhaust & CAI with a tune to get proper A/F ratio for your area is the only way to really get the HP out of the car.

I'm not very familar with dodges engine control but I know on fords that it can take a good while before it learns any changes and gets a decent A/F curve. Even so it still stays on the rich side for safety.

You must remember that they tune these cars to be very safe so that they don't have them in the shop for repairs.
 

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Thanks Kurby, can't wait to hear the clips. I've heard them on the 300C and on the Magnum R/T, but not yet on a Charger. If they sound that good, i'll do that instead of paying $800 or so on a complete cat-back exhaust.
 

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KurbyRTHemi said:
The cost was $278 for two replacement Magna Flow mufflers and removal of the two resonators. Removing or tampering with the catalytic converters will affect the warranty. Sounds like a beast, but when you are cruising down the highway you barely hear the pipes. But, when you mat the gas, that baby will really start talking.

I will post a video clip tomorrow.
Do you know if headers will void the warranty?... I was planning on installing headers with high flow cats and a Dr Gas X pipe with bullet mufflers...but I do not want to void my warranty
 

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T/A Rumbler said:
Do you know if headers will void the warranty?... I was planning on installing headers with high flow cats and a Dr Gas X pipe with bullet mufflers...but I do not want to void my warranty

If you want to go the header route I would suggest talking with your dealer. Some Dealers are pretty good about mods and will still cover everything but the replacment parts.

If Mopar came out with headers I think that would be awesome. Even if they don't somedealers will install the headers for you and still cover your warrenty for everything else. If another shop does the headers and down the line you have engine issues they can try and pull the headers caused the issue response.
 

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Working for a dealer in service, I WOULD NOT TALK TO OR HAVE A DEALER INSTALL ANY TYPE OF HEADERS! The last thing you want is for the instalation of a performance modifing part to show up on chrysler's computers. If you had any type of extended warranty, void! If they were installed outside of chrysler I doubt the average service writer could tell the diffrence, and the ones that could probably wouldn't say anything anyway...
 

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Thanks for this tid-bit chargershed. I have been toying with the idea of getting headers once I get the Daytona (actually will be a while after cuz I will have to save up for them). Knowing this, I will research the muffler/automotive shops nearby to see who is a good candidate for doing the install for me. In my younger days I would do them myself, but my knuckle banging days are over. :)
 

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What brand of headers are out there for the charger? I know I saw some under-car pics on a really early chargerforum thread but can't locate that thread now. I am thinking about putting headers on and getting rid of that huge x-resonator for straight pipes. Can't seem to find any brands listing Chargers online so am asking here.
 

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HIGH_HEMI said:
What brand of headers are out there for the charger? I know I saw some under-car pics on a really early chargerforum thread but can't locate that thread now. I am thinking about putting headers on and getting rid of that huge x-resonator for straight pipes. Can't seem to find any brands listing Chargers online so am asking here.
I haven't seen any for the charger yet, but did find them available for the truck 5.7 hemi at MOPAR online.
 
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