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Old 11-20-2018, 03:25 PM   #1
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Viggen Exhaust system idea

Playing around with theory here before executing. I’m trying to shy away from the general sound that these cars make while keeping a positive exhaust flow. This is a drawing of a potential system for my Viggen. Wanted to see what others thought.
The plan is to stich mufflers from aftermarket companies that produce mufflers for similar style systems.
The “unknown resonators” are something I’m looking into as a glass pack is of no interest. I am also considering the stagered nature of the resonators to mantain a consistent and ideal back pressure but flowing at nearly a 5” exhaust at the center would be something audible. 3” out to calm things down on the deciple chart.
Thoughts are very welcome!
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Old 11-20-2018, 04:39 PM   #2
Drew In Houston
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I say do it. What turbo are you running? The stock Viggen exhaust after the downpipe can flow sufficiently for 400whp.

I think the characteristic sound has a lot to do with the stock cast headers, the way 2 & 3 are tied together, and the medium-ish 9.2:1 compression ratio.

My brothers Viggen is running Nick's SS manifold through a GTX3071 and 3" all the way to a single muffler all the way in the stock position in the back, and it sounds pretty good.

It's not exactly, but it's more like a modified SRT4 sound. I left a little timing in the off-throttle areas of the ignition map, so it snaps around a little bit and sounds cool, definitely aggressive. People turn and look at it around town, but it's not obnoxious or droning on the highway.
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Last edited by Trionic3000; 11-20-2018 at 04:44 PM.
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