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new defined auto exhaust system (video)

Old 07-01-11, 11:40 PM
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Smile new defined auto exhaust system (video)

just got my defined auto system in, amazing work from logan, some clips of some pulls and idle,breaks up a bit still need to tune.

http://www.youtube.com/watch?v=EjcaHkM2V1o

http://www.youtube.com/watch?v=GDZcIeuR_XM

http://www.youtube.com/watch?v=RXPxkjtI1J0
Old 07-02-11, 12:08 AM
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At idle it sounds like marbles in a paint can.
On throttle it sounds like a bushel of angry hornets.
Maybe even two bushels.
Old 07-02-11, 03:36 PM
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sounds like fairly thin metal for the pipes. has that raspyness going on there
Old 07-02-11, 04:42 PM
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I think I hear the sound echoing off the buildings. I'd like to hear it on a deserted highway in broad daylight.
Old 07-02-11, 04:54 PM
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sounds good when you're on it! at idle though it sounds like there isn't much between the mic and the combustion....
Old 07-03-11, 01:04 AM
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Too loud man too loud! As quoted from the end of a def leppard song.
Old 07-03-11, 05:48 PM
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"wahhh ur rx7 sounds like it has a rotary engine in it ur exhaust sux"
Old 07-03-11, 06:34 PM
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generally speaking, it's a tad loud for my tastes. however, given your engine setup, it is what it is and i'd live with it just fine. would have been nice to get pre- and post- numbers for comparison's sake.
Old 07-03-11, 11:17 PM
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Sounds good to me, but then again I have a set between my legs. What's with all this too loud crap guys? Go find your wives purse' when she's not looking and get your ***** back for crying out loud.
Old 07-04-11, 11:11 AM
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I love the sound of it, but I would prefer it to be a little less loud, just to not make too much noise driving through the neighborhood.

I wouldn't mind it on the inside, because I'd be sound-dampening the car anyway.

PS: More videos, please.
Old 07-04-11, 11:22 AM
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It's a bridgey, yeah?

That makes idle noise problematic... you kinda have to run a straight through exhaust. That's tolerable on a street port because you can run 20-25 degrees of advance at idle which REALLY quiets the engine down, but with a lot of overlap the engine won't really tolerate trying to run with that much advance, runs way rough.

My half bridge idles smoothly at ~1000rpm with timing at about 0deg, but it's got the same sharp popping loudness going on. I keep thinking my next engine will be a street port because I can run a baffled muffler again.
Old 07-04-11, 11:53 AM
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Smile

i just wraped the header yesterday, and it has eliminated more of the echo sound, im going to wrap the rest of the pipe to the rear muffler, this coming sat, should concentrate the raspyness down alot more, i dont drive on the street much maybe 2 to 3 times a month.

more to get the fluids flowing , and maybe for a hour at most, and on highway roads only. car doesnt like traffic. it sounds like a harley davidson with straight pipes at idle.

hopefully enzo can tune it by end of the month, so we can see the numbers. i have my first son on the way due in november. so car will really sit until i can hit a track event next year, probably at etown, then pocono in pa, other than that will start her up go around the block then park her back in drive way.
Attached Thumbnails new defined auto exhaust system (video)-defined-system.jpg  
Old 07-06-11, 11:40 PM
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Haha I love the full throttle runs and flyby with a aircraft carrier stop at the end! Sounds good and not insanely loud for only two mufflers. Great at WOT though!
Old 07-17-11, 03:04 PM
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I take it back, that car sounds freaking sweet. I think I could listen to it idling all day long.
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