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#1
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Do resonators stop drone ?
hi, I am wondering has anyone fitted resonators to stop drone, I have tried a few different mufflers but they droned at around 2000 rpm , took them off fitted VT'S no drone but lost power, I am thinking to put the straight thru muffs back on with resonators on the tail pipes , any thoughts anyone ? thanks
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#2
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Tried resonators at end of tail pipes. Did nothing for drone. Made exhaust quieter, of course. Seems from various posts on this and other forums about drone, the most success is from removing X pipe. I believe it's Tom S. on this forum that has removed X pipes from several of his cars with 100% success in removing drone with no seat of the pants loss in power.
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#3
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As far as mufflers I to tried a few of them until I came across the new style Thrush Turbo flow mufflers. They have a great sound & no drone at all. They are they same as far as reg. style mufflers they are the oval type & come in 2 1/2 & 3 inch in & out & them come with the inlet & outlet where they need to be. cost is the best part, they run about $ 40.00 a piece. I've run them now for about 4 years & they sound great & they last.
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#4
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#5
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#6
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Compression ratio, valve opening and closing events (camshaft), intake manifold, exhaust manifolds or headers all play a part. Unless you can find the same car with same engine build, drivetrain, rear gear and exhaust system, yours may drone and other persons may not. It's a trial and error process. You're unwilling to try removing X because it "might" be too loud, the VT's are robbing power, you've tried a few different mufflers and don't want to try any more, I'd say you're at the end of the road. Turn up the radio or buy some ear plugs.
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#7
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#8
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Are you sure about the amount of power you think your loosing because I think you just might be hearing some different sounds rather then actually loosing any real power. I don't know of any real lose in power from any muffler that is on the market today. all the ones you have tried are performance mufflers & I really don't think you could really tell any real lose of power but maybe some difference in sound. Plus taking the X-pipe off as mentioned it won't make any real change in the drone but maybe in the sound . Plus the Thrush mufflers are made like a straight through muffler , & if you look at the design of them you would see how the insides work & perform.
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#9
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__________________
"The Mustang's front end is problematic... get yourself a Firebird." - Red Forman |
#10
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__________________
"The Mustang's front end is problematic... get yourself a Firebird." - Red Forman |
#11
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#12
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Back in the day, when i flipped the lid on the stock 2 barrel air cleaner, that thing sounded way faster.. Then replaced the transverse single exhaust muffler with a single glass-pack. Man, my car was flying.
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Bull Nose Formula-461, 6x-4, Q-jet, HEI, TH400, 8.5 3.08, superslowjunk |
#13
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Dynomax 17749 (offset in/out) 20" case Super Turbo's. Good flowing muffler. I had Flowmasters (50 series) on my GTO to start with and at most any rpm you'd run on the street you couldn't hear yourself think. The DRONE was terrible. With no other change than swapping on the 17749's my car was completely transformed. No drone at any rpm. I have always run an H pipe. 2.5" mandrel bent pipes. Search 17749 in the archives. They have a pretty strong following.
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frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. |
#14
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Since when I install my new top-end I can only afford to dyno tune for that, I planned on using the "performance meters" functions in my Dakota Digital gauges to see if there is a difference with and without an x-pipe in 0-60 and 1/4 mile. I have an auto trans and can do the tests the same day at the same place. I'll also make 3 runs each time to get an average. I'm genuinely curious. Plus I would of course like to compare the sound with and without.
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1969 Pontiac Firebird |
#15
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#16
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hi I tried everything to stop drone on my 2.5 inch pypes system, various mufflers, adding weights to pipe all that, nothing worked until I found my fix, i still have the VT's fitted, no drone, no rattles some speak about, i can talk and hear my radio when at cruse, stomp on it and there is the power and the nice tone its all good why mess around , the vt muffler is the answer without question
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#17
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#18
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HA! All the young kids in my area subscribe to this way of thinking.
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1965 Pontiac LeMans. M21, 3.73 in a 12 bolt, Kauffman 461. |
#19
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dynamax vt.…. vt is valve technology, simple plate on stainless spring that opens when you stomp on the gas, you then get straight thru sound and power, metal door stays mostly shut on cruise so its quite and zero drone, no brainer they work I proved it after so much wasted money and time doing everything else
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#20
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Motor Trend did a bunch of videos where they dyno tested mufflers and 2.5 v 3" exhaust etc to see if that stuff actually made more power. I think was all on SBC. You can see them on Youtube. Bottom line there is a difference. I don't know if you can feel 4-10 hp as much as you can experience the sound of muffler change. But there is a difference.
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