Helix Test Pipes (hissing sounds anyone???)
06-17-2009, 07:09 PM
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Helix Test Pipes (hissing sounds anyone???)
Just got my Helix TP installed, non-resonated BTW. Loving it except the hissing sounds (I got no turbo) that always there when it hit 2.5 to 2k rpm. Check out this video I took (you got to turn it loud, pay attention when I release the gas and hit around 2.5k rpm):
<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i155.photobucket.com/player.swf?file=http://vid155.photobucket.com/albums/s294/christiannathaniel/VID00001-20090617-1950.flv">
My question is, eventhough I already checked all over the forum, is this normal? I noticed my Intense Y-pipe pretty scraped around the flex area for being too low, is it because of it? Anyway to get rid of it?
Comments or opinions anyone?
<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i155.photobucket.com/player.swf?file=http://vid155.photobucket.com/albums/s294/christiannathaniel/VID00001-20090617-1950.flv">
My question is, eventhough I already checked all over the forum, is this normal? I noticed my Intense Y-pipe pretty scraped around the flex area for being too low, is it because of it? Anyway to get rid of it?
Comments or opinions anyone?
Last edited by chrisnathan; 06-17-2009 at 07:12 PM.
06-17-2009, 07:18 PM
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Just listened to your vid, when i had helix TP with stock exhaust...it sounded horribleeee...i took it off ina matter of days, once you get an aftermarket exhaust it will sound amazing......here a vid of my Z with...(helix TP with injen ses Ti exhaust)
http://www.youtube.com/watch?v=jBc24zH49GU
http://www.youtube.com/watch?v=jBc24zH49GU
06-17-2009, 07:30 PM
#6
^^
No he does not have a leak.
That hissing sound is absolutely normal. I have it with my Berk HFCs, my cousin's '04 G coupe has it with Megan V2 test pipes, many clips on youtube have it, it's everywhere.
People have agreed to blame it on the flex sections on the y-pipes.
No he does not have a leak.
That hissing sound is absolutely normal. I have it with my Berk HFCs, my cousin's '04 G coupe has it with Megan V2 test pipes, many clips on youtube have it, it's everywhere.
People have agreed to blame it on the flex sections on the y-pipes.
06-17-2009, 07:36 PM
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^^
No he does not have a leak.
That hissing sound is absolutely normal. I have it with my Berk HFCs, my cousin's '04 G coupe has it with Megan V2 test pipes, many clips on youtube have it, it's everywhere.
People have agreed to blame it on the flex sections on the y-pipes.
No he does not have a leak.
That hissing sound is absolutely normal. I have it with my Berk HFCs, my cousin's '04 G coupe has it with Megan V2 test pipes, many clips on youtube have it, it's everywhere.
People have agreed to blame it on the flex sections on the y-pipes.
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06-17-2009, 09:23 PM
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Aluminum foil? Never heard about that, interesting. I'm not sure if aftermarket or stock would make any hissing difference. Anyone else would chime in?
06-18-2009, 05:46 PM
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My turbo XS test pipes make the hissing sound too. Does anyone know if using the mounting brackets helps with the sound? I heard that using the mounting brackets causes cracking.
06-20-2009, 12:09 AM
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Update: brought the car back to the shop where the TP installed, they put the car on the lift and have one of their crew stepping on the gas. Hissing comes from the mid part of the Y-Pipe!! Dang!! WTF?? I guess I just have to live with it, planning to go to muffler shop and have them to mod the Y-Pipe.
06-21-2009, 06:23 AM
#18
i got the same problem - it only happens when decelerating. if i cruise down hill with engine brake around 2000rpm, the noise continues until either i get out of the noisy area (1800~2200rpm for my car) or touch the accelerator.
My Y pipe is some ebay cheapo, and one of the flex joint is scraped and internals exposed (meshes all torn). However, the noise was happening even when the pipe was in better condition and i wonder if replacing the flex joint would fix the problem. I am more suspecting that it may have got something to do with the Y pipe merging the two pipes and some sort of turbulance being created in the mid section of the Y pipe.
XYZ pipe looks very good, but its rather expensive and unsure whether that would fix my problem or not... I quite like the easy to replace cat/reasonator/pipe idea though!
My Y pipe is some ebay cheapo, and one of the flex joint is scraped and internals exposed (meshes all torn). However, the noise was happening even when the pipe was in better condition and i wonder if replacing the flex joint would fix the problem. I am more suspecting that it may have got something to do with the Y pipe merging the two pipes and some sort of turbulance being created in the mid section of the Y pipe.
XYZ pipe looks very good, but its rather expensive and unsure whether that would fix my problem or not... I quite like the easy to replace cat/reasonator/pipe idea though!