Looks like if you want the Stainless Specialties "turbo tones" Cobra sidepipes that, IMO, make the pipes on a big block "just right" for anything short of full out racing, you're going to drop about $2,500. Stainless Steel Cobra Pipes You can hear mine by clicking at the bottom of my sig line.
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" Is there a way to keep the side pipes (love the way they look) but dramatically cut down that exhaust noise without killing horsepower? "
If your personal desire is to have " dramatically " quieter side pipes, and accept a loss of HP which will not impact for your style of driving , the pipes will need to be rebuilt using options such as more restrictive mufflers, cones, discs with or without the center pipe being blocked, and other options such as the internal baffles used on a Harley exhaust. The challenge being there is no magic formula to predetermine the end result. My Z06 with Bassani X pipe and Borla Stingers is loud, but exiting at the rear makes it more acceptable when driving as compared to the location of the side pipes. |
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http://www.your-lawn-care-basics-coa...esearmuffs.jpg |
LOL Lovehamr!
ParickT - mine are a bit smaller than those... I use the ones I plug into my ears. Although I do use those at my shooting range... ;-) OK, so has anyone ever put up fake side pipes (not connected) and run a normal exhaust with mufflers out the back and hidden it under the car so no one sees it? I know I'm getting goofy with ideas. But I was curious if anyone tried it... That way I could keep my HP by going with a better quality large volume muffler and keep the cool look of the side pipes. Let the tongue lashings begin... (except you, Lovehamr. You keep your tongue where I can see it!) ;) -OR- Even better.... Both connected. And a valve or something that would allow me to switch between the two... Truly best of both worlds... |
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* - there are exceptions Feel free to do a search - there should be numerous threads on this I'd suggest. |
Of course cars with real sidepipes snicker, laugh, and point their tires at cars with fake sidepipes. They don't let them play any of the Cobra games either.:cool:
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I honestly am not an expert on them but the guy who had the car originally said he actually picked up hp after installing them. I can tell you that the sound level is just about perfect, you dont need earplugs when driving but they sill sould really good when wot. I like loud pipes but dont want to wear earplugs or have the cops hassle me. I belive you just take out the packing and weld these in but im not sure. |
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If I could build a car with "fake" side pipes and a super quiet rear exhaust system I would be very happy... |
It can be done
I replaced my 2 1/2" x 24" Lone Star sidepipes with the louvers turned backward so as to not pick up air flowing pass them, for Classic 3" x 28" with the louvers turned to pick up air flow. I also moved (rotated) the tips up 15 degrees so the exhaust would not "hit" the ground beside the car. It now blows more of across the pavement.
I gained hp on the dyno and it's a lot quieter. I can talk to my passenger at 70 mph with easy. I could not do that before. I still have that deep rumble that a Cobra should have. And when I go full throttle, you can hear me. I have the best of all worlds. Dwight |
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At least this seems to be the majority of anecdotal experiences of most who have done it. I for one think that there are advantages of under car exhausts, including no snake bite & noise, but I still prefer a 427 with them pipes (active or otherwise), it adds to the look & attitude of the car :cool: Have search on the Australian forum of Clubcobra. |
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A rough rule of thumb is you need about 2.2cfm of muffler airflow for every engine hp. Dynomax has cfm ratings for their mufflers on their homepage: http://www.dynomax.com/assets/2008ca...superturbo.pdf Place the muffler as far away from the engine as possible. This will allow the exhaust gases to cool down what actually decreases their volumetric flow rate because the density changes with temperature. You should also try to follow the guidelines for pressure wave tuning as outlined here (one of the best articles about exhaust design I know): Auto Exhaust Science |
I’m curious what people are considering loud enough to require ear plugs. My KC 408 running through Superformance headers and side pipes doesn’t seem overly loud (unless I’m hammering it).
Either mine’s a tad on the quiet side or maybe I’m already going deaf? |
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I could see a cross-flow under car exhaust system being very doable....shorty headers (maybe Mustang 5.0 GT factory style) and aluminized exhaust tubing, using very thin mufflers with ovalized pipe under the car to increase ground clearance...OR, chambered ovalized pipe with NO mufflers. The under-car/rear exhaust, if designed to be free-flowing enough to retain the majority of the horsepower, really seems to be the best of both worlds, IMHO. They sound good, look classy, and you can actually hear the empassioned pleas emanating from the sweet, young thing in the seat next to you as she sobs and begs for you to slow down :eek: ! Cheers from Dugly :cool: |
Add a turbo, the car will not be as loud and you will have a few hundred extra HP. :D
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