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BB2DAK
Dodge Dakota
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3/14/2002
22:36:11
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 Subject: 4.7l Exhaust
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I am looking into replacing the stock muffler on my 4.7L with a Dynomax super turbo.
I'm looking for a performance increase from this change.
However, I have read in a few posts that the stock muffler on the 4.7L flows very well, and that changing to a performance muffler shows almost no benefit.
Anyone have any information on this ?
2001 Quad Cab SLT+ 4.7L, 5-Spd, 3.55 Lsd
ARE Cap, ArmaCoat Bed-liner, Pilot PILPL119X Fog Lights
Autolite 3923's, IAT Adjuster, K&N Drop-in w/modified intake
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Aaron
Dakota Enthusiast
 
3/15/2002
12:38:22
|  RE: 4.7l Exhaust
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most people are doing it for the sound. you might get a little improvement with the correct combination.
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jon
Dodge Dakota
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3/15/2002
12:49:12
| RE: 4.7l Exhaust
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I also hear the stock cat is pretty free flowing (this from local muffler shop guys) is that true or not?
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conig
Dodge Dakota
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3/15/2002
13:24:50
| RE: 4.7l Exhaust
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in my opinion the stock cat is the bottleneck of the 4.7l go to moparchat and search under are there mods that work for the 4.7l duner explains it all.
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kevster
Dodge Dakota
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3/15/2002
18:59:17
|  RE: 4.7l Exhaust
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I have a 2k Dak 4.7 auto, 3;55 gears and I installed the Flowmaster delta series 50 on it and This woke its ass up. I was very Pleased. Now I will do the same to my 2002 Dak quad cab 4x4 4.7 auto, 3;92 gears. Cant wait.. And yes I have two Daks. I spoil myself.
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handi2
GenIII
3/15/2002
19:47:38
| RE: 4.7l Exhaust
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Kevster,
Which muffler is not to loud..? Should I go with the SUV muffler they sell..? I want the performance gain without being to loud.
http://photos.yahoo.com/handi254310
2002 Quad Cab SLT Plus 4.7 Every Available Option
Access Tonnoue Cover/Bedrug/Airaid Intake/Jet Stage 2
180 Robertshaw/Roadmaster Active Suspension
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hardbody
Dodge Dakota
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3/15/2002
23:11:08
| RE: 4.7l Exhaust
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Message:
The cat back kit flowmaster sells using the 50 series suv muffler single exit in 3" gives the 4.7 a slightly deeper tone at idle but it's not overly loud at all. It's hard to tell ( at least on my truck) how the exhaust sounds at speed cause the air intake drowns it out. Personally I'm changing the 50 series with either a 40 or 40 delta flow as the 50 suv is too quiet.
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MACE
Dodge Dakota
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3/19/2002
08:56:57
| RE: 4.7l Exhaust
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Go to:
http://www.flowmastermufflers.com/web10/productsf5.html
They have wav files for every muffler listed.
Also note they claim (via tech line), the longer and wider the case of the muffler, the better flow or more HP/TQ gains one muffler may give over another.
Switching from a SUV 50 Series to the 40 Series will give you a deeper exhaust note but you may lose some HP/TQ.
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D Denney
Dodge Dakota
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3/19/2002
09:15:57
| RE: 4.7l Exhaust
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I recently had a 50 flowmaster 1 in 2 out installed on my 00 4.7 and my 0-60 time went down by .8 seconds,a noticable decline in low end grunt.Gonna get a ztube soon, hopefully this will help solve this problem. 2.5" out to stock location,sound is great but performance suffered
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