05-11-2006, 07:09 PM
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#16
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OK, good, I'm glad somebody else has the long pipe on there V8 too. I figured the drone had nothing to do with that but thought I'd ask anyway. And I agree - the exhaust sounds *great* at low range, but that highway cruising speed drone kills me. Don't know if dynamat would help - I would think so, but it's all a matter of how to install it properly underneath the car. I'll let you look into that, keep us posted on how that works out. I'm going to look into a resonator or something else to help regulate the flow and control the drone. I'll let you know if I find any solution that works. I'm just torn because not only does it sound great, it looks so much better than the stock system as well. There has to be some kind of solution out there...
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05-12-2006, 04:10 PM
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#17
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The resonator should be easy. Use the extra pipe with a flange (probably the short one if you have a V8) and have a glass pack welded in. A muffler shop I went to used old fashioned straight glass packs as resonators and said they work well. I was told that a resonator between the cat and the muffler is the best position to eliminate the harmonic. Your next move would be to replace the magnafloww muffler with a super turbo type muffler IMHO. I don't think the insulating material you are considering will eliminate a harmonic noise but that's just an opinion that's not tested.
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05-13-2006, 10:50 AM
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#18
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Fact Muffler
Quote:
Originally posted by Ele'ele
I made a post long ago about my magnaflow installed. I also had the drone about 1700 rpm and thought I could take it. But after 2 weeks I took off my cat back and put the stock system on. I just could not live with that constant drone, especially since I was always driving in the 1700- 2000 rpm range. What I did do was take my magnaflow system to a muffler shop and had them weld on just the double end tips onto the stock toyota muffler. Cost $50 but I have this great little rumble when I accelerate and coast. You can notice that rumble both inside and outside of the car. so I am stuck with this beautiful stainless steel magnaflow muffler but I have the double tips on and it looks and sounds great. Perfect.
Clint
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I just got back from a trip to VT towing a small utility trailer and I agree with most that the drone is very present and is almost annoying. I had two passengers in back and they commented on how difficult it was to have a conversation(older people w/hearing not 100%). Everytime I would hit a long mountain hill for a few miles, the motor wants to pull right in that zone. Either that or I would have to make it downshift and suck more gas. Was kind of annoying. Love the sound outside though. Strange how it sounds like it would be so loud outside from the inside the truck but it really isn't that loud outside. Got 16mpg towing small trailer and a large aluminum extension ladder on kayak racks@70mph, sometimes 75. Not too bad I guess.
Clint, I was seriously thinking of doing that. So with the MF piping and toy muffler, minus the toy resonator, it still has a nice so?!nd?Wish you had a sound clip. That would help alot! Can you compare the sound to any vehicle? Nissan Armada/Titan maybe? They have a distingishing note stock.
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05-13-2006, 07:37 PM
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#19
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Maybe a solution...
I was doing some research on sound absorbing materials(dynamat, cascade, etc).
I spoke with a tech at Cascade Audio and told me that the drone issue can be solved by installing one of their sound barrier material (VB 4.5). It's a bit pricy (about $300 to do the whole floor) This material would replace the factory padding under the carpet.
I'm going to order and install it. I hope it works. I'll keep you guys in the loop.
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05-15-2006, 01:35 PM
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#20
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Quote:
Originally posted by Bobster
The resonator should be easy. Use the extra pipe with a flange (probably the short one if you have a V8) and have a glass pack welded in. A muffler shop I went to used old fashioned straight glass packs as resonators and said they work well. I was told that a resonator between the cat and the muffler is the best position to eliminate the harmonic. Your next move would be to replace the magnafloww muffler with a super turbo type muffler IMHO. I don't think the insulating material you are considering will eliminate a harmonic noise but that's just an opinion that's not tested.
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Just remember that exhaust systems/components are not all made of the same quality. If you add a plain steel glass pack you can expect it to last approx two years. The Magnaflow cat-back system has a lifetime warranty.
Koz
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05-21-2006, 05:23 PM
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#21
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Also what some of you guys are missing in your posts is which Magnaflow you have. they come in about four lengths. This will effect the sound characteristics. You can't compare without more more specific details.
Do you have a 16", 18" , 22" muffler? (Not sure on the sizes right this moment).
Also to keep the variables down, where does your exhaust exit - in the stock position, out one side, out two sides, just after the rear axle (offroad high clearance application) etc. and what type of tip have you placed on the end, if any?
Last edited by Expat; 05-21-2006 at 05:26 PM.
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05-28-2006, 11:41 PM
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#22
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I don't know if this will help some of you guys to eliminate the drone issue at certain RPM, but I thought I'd share what I heard. I've met a Sequoia guy with TRD catback exhaust, which was designed similar to the set up on the 4th-G 4Runner. This thing is so quite just like it was stock at start-up and while idling. But it's rumbling like a beast at WOT. The exhaust sounds much better than my Borla. Turn-out, the owner has had the same dronning issue when he first installed on his SUV. He then went to a local muffler shop and added an extra universal resonator onto the pipe. Problem has been gone away and it only cost him $90 bucks. $30 for part and $60 bucks for labor. You guys with Magnaflow can give it a try to see how it turns out. I forgot to ask him who made the resonator. Good luck.
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05-29-2006, 12:34 AM
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#23
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Quote:
Originally posted by Expat
Also what some of you guys are missing in your posts is which Magnaflow you have. they come in about four lengths. This will effect the sound characteristics. You can't compare without more more specific details.
Do you have a 16", 18" , 22" muffler? (Not sure on the sizes right this moment).
Also to keep the variables down, where does your exhaust exit - in the stock position, out one side, out two sides, just after the rear axle (offroad high clearance application) etc. and what type of tip have you placed on the end, if any?
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I agree, the length of the muffler makes all the difference in the world. I had my stock muffler taken off and one of the larger Magnaflows put in. Don't remember if it was 22" or 24", I'll have to check my paperwork. But, it sounds great. Not loud at all, just a nice performance sound under acceleration. Very little if any drone at highway speeds.
ddd269 you might want to swap out the muffler for a longer length one that will make highway driving a little more tolerable.
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06-07-2006, 10:53 AM
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#24
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I've got the Magnaflow exhaust on my truck as well, and it sounds awesome for the most part, except for that drone that we all hate. I wanted to let you know not to invest any money in sound deadening material to fix the problem. I've already done that, and it didn't help. I put 2 layers of the stuff in the trunk, two layers under the back seat and the floor boards in the back, 2+ layers on the floor boards in the passenger and drivers seats, and 2 layers inside all 4 doors. It took me a while to get all of the material down. Even after all that $$ and time, the sound is still there! I just went on a 10 hour drive, and I will say that cruising at 70-75mph, it was annoying. I started to miss the quiet cabin of the stock exhaust. i think I may try talking to an exhaust shop about adding a resonator in front of the muffler like some of you have suggested. Sounds like that may be the answer.
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06-07-2006, 12:26 PM
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#25
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Thanks for the info about the sound deadening material... You just saved me a bundle of money and time. It was going to be a $400 project to cover all the floor and passenger side plus time (priceless...).
A question about resonators, though.
1. Will the resonator "eat up" the extra power we gained?
2. Will it quiet it too much?
3. Any experience with a good resonator(brand)?
Thanks for all the input guys.
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'04 4runner Sport V8/4WD Magnaflow cat-back, Volant CAI, OBX Pedals, Nitto TerraGrappler 265/70/17 w/ 17x8 Eagle 058 wheels. Cornfed 3" Spacer, '06 4Runner Skid Plate, Airaid throttle spacer, Mesh grill (upper/lower), Hella super tone 85115 horn, Amsoil dual bypass oil filter kit, Parrot 3200LS Bluetooth Car Kit, Garmin Nuvi 350 Navigation
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06-07-2006, 12:29 PM
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#26
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That's the same info that I want to know. I don't want to be the first one to do it, but I may have to. I've got a baby on the way, and I don't think an infant will be able to sleep soundly with that droning in the cabin.
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2005 Black Sport Edition 4x4
Magnaflow Catback exhaust,rear lens mod, fog light mod, T4R.ORG sticker, Hella FF50 driving lights, Alpine 9857 HU, Sirius, Infinity Reference 6.5" components, Ample Audio Exonic amp 60 x 4, Alpine 350 amp powering an L5 solobaric 10" square subwoofer sitting in a custom TRD stealthbox
red map lights, Overland Warehouse 2.0 3"lift, Cooper STT 285/70/17's
Valentine One Radar Detector with concealed display
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06-07-2006, 12:40 PM
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#27
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Quote:
Originally posted by digphisher
That's the same info that I want to know. I don't want to be the first one to do it, but I may have to. I've got a baby on the way, and I don't think an infant will be able to sleep soundly with that droning in the cabin.
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lol... That's the same thing that I was thinking for the past few weeks. We are planning on our 3rd and this could be an issue.
Or maybe she (I hope it's a girl) will be a motor head and help daddy work on his car!
Any one can help a baby girl with this drone issue?
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'04 4runner Sport V8/4WD Magnaflow cat-back, Volant CAI, OBX Pedals, Nitto TerraGrappler 265/70/17 w/ 17x8 Eagle 058 wheels. Cornfed 3" Spacer, '06 4Runner Skid Plate, Airaid throttle spacer, Mesh grill (upper/lower), Hella super tone 85115 horn, Amsoil dual bypass oil filter kit, Parrot 3200LS Bluetooth Car Kit, Garmin Nuvi 350 Navigation
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06-07-2006, 01:46 PM
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#28
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i guess im the only retard out there that things that my exhaust is too quiet.
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06-07-2006, 02:58 PM
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#29
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Quote:
Originally posted by ddd269
Any one can help a baby girl with this drone issue?
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I say don't trash the whole cat-back, just have a longer more quiet Magnaflow muffler welded in.
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2005 4X4 V8 LTD 4Runner Black
Driver's side upper assist handle, tail/stop bumper light mod, Flowmaster 50 suv with side exit exhaust and Valor tip, 20% tint on fronts and 27% add'l tint on rear window, DIY blacked-out headlights, Stainless door sills, VIP Plus w/GBS alarm, OBX pedals, Can. hood protector, ash tray kit, '06 LED tails, T&H Euro bar, OME lift, Spidertrax spacers, LT275/70R17 Cooper AT3s, HIR bulbs in LB and fogs, VSC mod, AFE Pro Dry S filter, White LED cluster and HVAC
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06-07-2006, 11:44 PM
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#30
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M/F cat-back
Problem is I think, most here have the cat-back s/s system which I think only comes with a 24'' muff ...I think its a 24 anyway. I think mine is louder after a year of use.
Once you trash the muff, you are left with 2 pipes and a tip for 375??? Ah...I don't know....
Still love the sound outside though, not too loud still but inside is a bear!
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2011 Acura MDX Tech
2012 TE Nav classic silver(Sold)
2008 4runner Limited V8 Nav, Toytec level, Concept Headrest Monitors, tule rack system.(Sold)
2005 4runner Sport V6 Titanium Silver, 3m Scotchcal film, Eclipse AVN726 Nav, 18" limited wheels w/265/65-18 Hankook ATM's,Toytec leveling spacer.
Last edited by lbrunner; 06-07-2006 at 11:47 PM.
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