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Low end torque loss with Magnaflow kits?

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Old Jun 15, 2010 | 10:48 PM
  #31  
avfrog's Avatar
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Originally Posted by SMOKEin
I'm not going to argue what cant be proved. What I stated was fact. The last two trucks that I put 18" magnaflow mufflers on dropped power and mpg, no question about it.
I think your full of poopy. Now stick this in your pipe and suck, I mean smoke it!


http://www.mustang50magazine.com/tec...o_numbers.html
 
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Old Jun 16, 2010 | 02:06 PM
  #32  
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Originally Posted by avfrog
I think your full of poopy. Now stick this in your pipe and suck, I mean smoke it!


http://www.mustang50magazine.com/tec...o_numbers.html
What exactly am I smoking? A link to a test of mufflers that only gives peak hp/tq numbers? Nothing relevant to the discussion.

I have stated that the last two trucks I had both loss low end and mpg's. Did I pick up top end/peak numbers? Maybe, but if I drove in that range all day I wouldn't be hanging out on an F150 forum. Show me a dyno of stock exhaust vs catback only and lets see the low end numbers.


 
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Old Jun 16, 2010 | 02:21 PM
  #33  
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http://www.magnaflow.com/newdyno.asp?action=display

Read 'em and weep.
 
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Old Jun 16, 2010 | 02:39 PM
  #34  
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Originally Posted by SMOKEin
What exactly am I smoking? A link to a test of mufflers that only gives peak hp/tq numbers? Nothing relevant to the discussion.

I have stated that the last two trucks I had both loss low end and mpg's. Did I pick up top end/peak numbers? Maybe, but if I drove in that range all day I wouldn't be hanging out on an F150 forum. Show me a dyno of stock exhaust vs catback only and lets see the low end numbers.


You're comparing a cobbled together muffler swap to a properly engineered, mandrel bent system. Your setup may have lost torque and MPG, but a Magnaflow kit won't.
 
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Old Jun 16, 2010 | 05:38 PM
  #35  
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Originally Posted by Stealth
No weeping needed.. If you were not trying to make your point, you would laugh me off the site for trying to use a manufactures claims to justify performance increases. Either way, graph still doesnt show lowend data.

Anyway, if I believed anything a manufacture posted about HP/TQ gains I would be running a Flowmaster kit. Just check the link below, they make 300 hp just by adding their kit.

http://www.flowmastermufflers.com/dy...17417_Dyno.pdf

BTW - If anyone really does believe manufactures performance claims, I suggest you get this product. 13HP and 24% better MPGS for a few bucks!!

http://www.asseenontv.com/prod-pages...fuelsaver.html
 
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Old Jun 16, 2010 | 05:41 PM
  #36  
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Originally Posted by hwm3
You're comparing a cobbled together muffler swap to a properly engineered, mandrel bent system. Your setup may have lost torque and MPG, but a Magnaflow kit won't.
Oh boy are you in for it.. I went against the grain by saying I lost lowend power and mpg's and that was bad enough. You just opened a can of worms though by suggesting that a canned system was better than buying a muffler and having a local shop fab you up a system.

Just so ya know, my system was mandrel bent.
 
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Old Jun 16, 2010 | 05:41 PM
  #37  
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Originally Posted by SMOKEin
No weeping needed.. If you were not trying to make your point, you would laugh me off the site for trying to use a manufactures claims to justify performance increases. Either way, graph still doesnt show lowend data.

Anyway, if I believed anything a manufacture posted about HP/TQ gains I would be running a Flowmaster kit. Just check the link below, they make 300 hp just by adding their kit.

http://www.flowmastermufflers.com/dy...17417_Dyno.pdf

BTW - If anyone really does believe manufactures performance claims, I suggest you get this product. 13HP and 24% better MPGS for a few bucks!!

http://www.asseenontv.com/prod-pages...fuelsaver.html
You've made exactly no counter point by posting that bunk!
 
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Old Jun 16, 2010 | 05:49 PM
  #38  
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You made no valid point for me to counter. You posted manuf. Claims on a dyno sheet that doesn't show any lowend data.
 
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Old Jun 16, 2010 | 05:54 PM
  #39  
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Well at least you have good taste in wheels.

It's common knowledge that a free flowing aftermarket exhaust increases HP and fuel mileage. My Roush Off Road exhaust did. Just like 1+1=2. It really is that simple.
 
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Old Jun 16, 2010 | 05:57 PM
  #40  
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Originally Posted by Stealth
Well at least you have good taste in wheels.

It's common knowledge that a free flowing aftermarket exhaust increases HP and fuel mileage. My Roush Off Road exhaust did. Just like 1+1=2. It really is that simple.
I experienced no low end torque loss either.
 
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Old Jun 16, 2010 | 10:02 PM
  #41  
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I'll take power under the curve all day long vs peak numbers or even worse elevated peak numbers.
 
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Old Jun 17, 2010 | 12:04 AM
  #42  
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I feel the ban button coming in his near future. Choose your words carefully SMOKEin.
 
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Old Jun 17, 2010 | 01:30 AM
  #43  
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He's not being belligerent. He's just woefully misinformed and doesn't really know what he's talking about.
 
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Old Jun 17, 2010 | 09:09 PM
  #44  
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Originally Posted by 4.6 Punisher
You will not lose any low end torque with this kit. The 2.5" vs 2.25" argument is for true duals, not a simple cat-back. You might gain a bit of power and torque, but the bottleneck will be the Y-pipe and intermediate pipe.

EDIT: You always lose power with chambered mufflers (Flowmaster, Cherry Bomb, Thrush) but never with straight-through mufflers (Magnaflow, Borla, Corsa, Bullets).
Im runnig cams in my truck... what kind of muffler will bring out the idle more? chambered or straight?
 
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Old Jun 17, 2010 | 09:42 PM
  #45  
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An aggressive straight-through muffler. Like Magnapacks, Bullets, or XR1's.
 
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