Anyone noticed this weird piece on their Borla exhaust? Looks like someone welded tincan?
04-01-2007, 04:46 PM
#11
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Well, enough BS...
no need to continue this April's post further. Reefer Bob got it right: It was done on my request to help with so annoing 2000-3000RPM exhast drone. I just could not stand it on my Avant this winter. Yes, it did reduce drone significantly, how much it is hard to tell, as I changed DP too. If I would have to guess, say 50% quiter then before. Drone is almost gone now in warm weather. It did quite the exhaust down too, about 30% overall, but changed the tone of it at WOT. It does not sound that raspy / agressive as before, there is more shhhh sound there, still far away from sanblaster type noise, just not as mellow as before.
Would I recommend to someone, probaly not, unless you sick and tired of that drone like me or willing to experiment with different volume / angle of that kidney.
Would I recommend to someone, probaly not, unless you sick and tired of that drone like me or willing to experiment with different volume / angle of that kidney.
04-01-2007, 04:49 PM
#13
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<center><img src="http://pictureposter.audiworld.com/29837/backfrt.jpg"></center><p>
<img src="http://pictureposter.audiworld.com/21941/ypipe.jpg"><ul><li><a href="http://goapr.com/Audi/products/apr_exhaust_s4_catback.html">http://goapr.com/Audi/products/apr_exhaust_s4_catback.html</a</li></ul>
<img src="http://pictureposter.audiworld.com/21941/ypipe.jpg"><ul><li><a href="http://goapr.com/Audi/products/apr_exhaust_s4_catback.html">http://goapr.com/Audi/products/apr_exhaust_s4_catback.html</a</li></ul>
04-01-2007, 05:10 PM
#16
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That's the first thing I thought when I saw it...
I know the Honda S2000 factory exhaust uses one of those. Basically the same effect as blowing across the top of a bottle, it creates a resonant frequency that can be tuned (through size and shape) to cancel certain other frequencies of sound. There should be almost no additional backpressure created from it as well. :-)
I'm surprised more aftermarket exhausts don't use them... they aren't that hard to make, even if you're just guessing what size you need at first.
I'm surprised more aftermarket exhausts don't use them... they aren't that hard to make, even if you're just guessing what size you need at first.
04-01-2007, 05:15 PM
#17
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^^^toolbox response... i dont know if you've heard borla exhaust....
they sound pretty damn good IMO. Most other tuners charge way too much for the same damn thing, bent tubing welded up to a usually generic off the shelf muffler anyhow.
But i guess all that R&D and pretty TIG welds really can justify the $500+ hikeup... or not.
"bling bling yO!"
*sigh*
But i guess all that R&D and pretty TIG welds really can justify the $500+ hikeup... or not.
"bling bling yO!"
*sigh*
