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MACE
Dodge Dakota
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3/15/2002
08:46:34
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 Subject: 4.7 Exhaust and Changing Tips
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I have a FM SUV 50 Series single in, dual out with 2 1/2 inch mandrell bent pipes and dual 3 inch angle cut tips.
I wanted to deepen the sound of the exhaust and visited my local muffler shop and he said by going to 4 inch tips, the sound isn't gonna change.
Has anyone gone from 3 to 4 inch tips and noticed a deeper tone from your exhaust sound?
He said maybe 5 inch tips would make a difference but IMHO, that seems a little too big, would look like I'm shooting grapefruits out my exhaust.
BTW, he's done quite a few DAKs (and QCs at that)...seems lately, everyone is going for Vortex mufflers, but removing the steel wool/fiberglass packing for that 'sound' that everyone wants....what exactly is that sound? (hopefully not no stinking Neon sound with a 7 inch coffee can sticking out the back)
Has anyone done the above with a Vortex...if so, what does it sound like?
Thanks...
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MACE
Dodge Dakota
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3/15/2002
12:12:17
| RE: 4.7 Exhaust and Changing Tips
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I just spoke with Flowmaster re: tips
Their opinion differes from my muffler shop, where FM says going from a 3 inch tip to a 4 inch tip will indeed change the sound of your exhaust, due to the 'megaphone' theory and larger diameter of the tips...thoughts on this? Anyone with real world experience to prove this out?
BTW, I asked which of all their mufflers they offer, would give the best HP/TQ gains for a 4.7
After their line that all mufflers offer the same gains (the all differ on sound though), 2 different techs came clean and said their best flowing (aka more power) application is their 70 Series Big Block II due to the fact that it has a longer, bigger case and largest tuning chamber.
Their 2nd best muffler for gains (and more deeper sound) is their SUV 50 Series...some 5 inches shorter than the 70 Series with a 6 inch tuning
chamber -vs- 12 inches on the 70 series
They still quote 5-7% gain in HP/TQ across their model line.
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YJ
Dodge Dakota
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3/15/2002
14:22:20
| RE: 4.7 Exhaust and Changing Tips
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I'd guess the tone wouldn't drop but the pitch may change to more of a rice-rocket tone. It's the ol' coffee-can, grapefruit-shooter theory.
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TEAMFAST
Dodge Dakota
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3/15/2002
21:03:16
| RE: 4.7 Exhaust and Changing Tips
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Vortex cherry bomb mufflers dont have
packing in them. They have
-[<<]=
metal silencers in em
Thats a single in dual out muffler. What an
artist!
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MACE
Dodge Dakota
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3/18/2002
12:03:48
| RE: 4.7 Exhaust and Changing Tips
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TEAMFAST: I've seen a web page saying the Vortex muffler has packing (wether is be steel wool type or fiberglass)...I can't find that page now, via various engine searches.
I do know Maremont offers a Cherry Bomb Turbo and Turbo Tunned mufflers that look to have the baffles you describe, yet I can't see anywheres where they list the 'Vortex' muffler product and describe it's inner make up...regardless, I'll stick with my Flowmaster SUV 50 series muffler.
Still looking for real world experience from someone who went from 3 inch tips to 4 inch tips, and if the exhaust note did indeed deepen?
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MACE
Dodge Dakota
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3/20/2002
13:45:22
| RE: 4.7 Exhaust and Changing Tips
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Vortex Cherry Bomb Mufflers...
Here is that URL that details there is stainless steel wool and fiberglass packing in the Vortex muffler:
http://masterm.www3.50megs.com/vortexkits.html
Pasting from that link:
1. Engine exhaust enters muffler.
2. Unique Flow Divider design splits exhaust into two streams without reducing flow.
3. Higher frequency sound waves dissipate into stainless steel wool and fiberglass.
4. Center of Flow Divider (the "vortex") provides further sound reduction.
5. Second Flow Divider splits the exhaust into two streams.
6. The two exhaust streams merge exit the muffler. The result is a smooth, mellow performance sound.
As mentioned, local muffler shop says a lot of DAK owners are putting on this muffler but removing the steel wool/fiberglass packing for a great sounding exhaust.
This URL claims the Vortex is a higher flowing muffler than any Flowmaster....all marketing hype or does anyone know of some dyno numbers to back this claim up? Better flow should equal better HP/TQ gains.
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Duner
Dodge Dakota
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3/20/2002
14:09:45
|  70 Series Flowmaster
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I'm running the 70 series Flowmaster on my truck. The sound is pretty mellow but it still sounds better than stock. I put it on to replace the Gibson muffler that came with the Mopar cat-back system. The Gibson killed all my low end torque and it made the truck sound like a low-compression garbage truck! The 70 series got some of the torque back... but not all of it. Although it's pretty quiet, the truck still produces a deep tone and isn't as "rasty" sounding as some of the mufflers out there. I will admit though, that I like my ride to be a little quieter than most "hot-rodders" on the street. I'm quite happy with it.
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CThomp
Dodge Dakota
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3/20/2002
14:59:59
| RE: 4.7 Exhaust and Changing Tips
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Duner
Does your 70 series have the inlet in the center of the muffler or to the right of center? Or does it even matter?
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Duner
Dodge Dakota
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3/20/2002
15:24:57
| RE: 4.7 Exhaust and Changing Tips
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I don't remember exactly without crawling under it. I seem to remember that it's slightly off center on both inlet and outlet. It doesn't really matter that much I guess. The Gibson was a round muffler which was on center and I had no problems putting the Flowmaster into the exact same spot. The Flowmaster was even the same length as the Gibson - which made it even easier.
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CThomp
Dodge Dakota
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3/20/2002
15:39:53
| RE: 4.7 Exhaust and Changing Tips
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good stuff. thanks for the help
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ZenDak
Dodge Dakota
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3/20/2002
15:58:54
| RE: 4.7 Exhaust and Changing Tips
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Changing your tips WILL change the sound of the exhaust,,,BUT when in your case Mase,,you wouldn't notice a diff. IMO. I could set you up the equipment and software to the 'real world' experiment if you got a couple thousand dollars laying around. Heck I could spec. it out down to the cables in a quote if you want me to!
But you won't notice it. If you want a deeper sound go w/the Flow. 2 chamber,,,which,,,I think is the 40 series (someone correct me if I'm wrong!). This is what I have on my truck, w/the same exhuast down to the tips as you have. It has a great deep rumble to it,, and has just enought 'pop' in it when you left off gas at high rpm's.
Hope this helps.-- P.S. I was serious if anyone's looks for some Dynamic Signal Acquistion hardware/software!
Andy
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CThomp
Dodge Dakota
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3/20/2002
16:08:02
| RE: 4.7 Exhaust and Changing Tips
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I'm not really lookin for sound all that much. I got good sound with my intake. What I really want is a little extra performance and some better mpg's. I'm also going to do a free-flow cat from carsound so that should help.
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Bri
Dodge Dakota
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3/20/2002
16:15:31
| RE: 4.7 Exhaust and Changing Tips
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Is there an exaust that has performance but is quiet??? I have the single in Dual out flowmaster and in the truck between 50-60 there is just this rumble.Its almost annoying sometimes. I had a girl tell me the other day that it was to loud in the back of the truck (Quad Cab)4.7. Im not sure what to do ?? I like the exaust when I get on the throttle but hate it when at a steady cruise under 70. Any Ideas ??
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CThomp
Dodge Dakota
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3/20/2002
16:35:28
| RE: 4.7 Exhaust and Changing Tips
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What series do you have? The 70 series is supposed to be the quietest.
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MACE
Dodge Dakota
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3/20/2002
17:14:58
| RE: 4.7 Exhaust and Changing Tips
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Andy, thanks for the feedback, gotta pass on the offer though...not sure if I should change out the 3 inch tips for 4 inch, or spend a little more and just swap out the muffler...want to keep what ever gains I picked up with the SUV 50 series but want a deeper 'rumble' and some quiet in the cab.
Bri: For the Flowmaster product line, this URL lists all their mufflers and has wav files to hear each application:
http://www.flowmastermufflers.com/web10/productsf5.html
Their Series 70 Big Block II muffler should be their quietest, and if one was to believe their techs (not all their techs will verify this), should also be their best flowing DAK muffler for best HP/TQ gains (longer, wider casing with 12 'tuning' chambers).
I went through 4-5 techs asking which muffler provided the best HP/TQ gains regardless of sound (didn't mention too loud or too low), and finally got two different techs who said the longer/wider mufflers flow the best...(the 70 Series BB II)
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conig
Dodge Dakota
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3/20/2002
19:31:56
| RE: 4.7 Exhaust and Changing Tips
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I have a lot of friends with CHEVY Z71'S and when one of my good buddys changed from 3.5 to 4.o there was a deeper slightly louder sound I never thought tils would increase sound but apparently I was wrong.
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Jed
Dodge Dakota
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3/22/2002
01:48:55
| RE: 4.7 Exhaust and Changing Tips
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Flow 40 is the best way to go. Has a nice rumble when starting and is really nice when you open it up. You can barely hear it inside the cab but everybody will tell you they can hear you coming from blocks away. Trust me I have on my RT.
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CThomp
Dodge Dakota
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3/22/2002
07:28:40
| RE: 4.7 Exhaust and Changing Tips
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I'm goin with the 70 series. I'm not into loud.
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CThomp
Dodge Dakota
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3/22/2002
11:18:17
| RE: 4.7 Exhaust and Changing Tips
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Anyone ever look into Edelbrock mufflers? I know they have no catback for many of our trucks but what about the maufflerS?
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CThomp
Dodge Dakota
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3/22/2002
11:39:58
| RE: 4.7 Exhaust and Changing Tips
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mufflers..damn I type well
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conig
Dodge Dakota
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3/22/2002
13:21:40
| RE: 4.7 Exhaust and Changing Tips
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I used to use the edelbrock rpm on a v6 and it was as close to a v8 sound that you could get from one.
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