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06-25-2013, 08:41 AM
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CC Member
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Join Date: Oct 2008
Location: Lions Bay,
BC
Cobra Make, Engine: CAN-AM cobra, 460 SVO
Posts: 326
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Not Ranked
sidepipe exit: horozontal or turned down?
I'm just at the final stages of sidepipe design, does it make any difference to the sound level if the sidepipe exits are pointed directly out horozontally, or if they are pointed down towards the ground a bit? I dont want to point them down too much as I think it would start to look "off", but I'm willing to turn them down a bit if it really makes a difference in lowering sound level.
__________________
Mark
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06-25-2013, 08:48 AM
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Senior Club Cobra Member
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Join Date: Jul 1999
Location: SF Bay Area,
CA
Cobra Make, Engine: SPF #1019
Posts: 1,657
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Not Ranked
I'm not sure about noise/sound levels, however pointing them down will cause rocks/dirt/etc to blow - you won't be very popular in a parking lot. IMHO, straight out horizontal is better.
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06-25-2013, 12:55 PM
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CC Member
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Join Date: Oct 2008
Location: Lions Bay,
BC
Cobra Make, Engine: CAN-AM cobra, 460 SVO
Posts: 326
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Not Ranked
good point! Although I'm not that popular anyway, setting off everyones alarm.. 
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Mark
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06-25-2013, 01:20 PM
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CC Member
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Join Date: Apr 2009
Location: Bethesda,
MD
Cobra Make, Engine: CSX 6022, navy blue, period correct 427 SO
Posts: 2,154
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Not Ranked
Quote:
Originally Posted by xlr8tr
I'm just at the final stages of sidepipe design, does it make any difference to the sound level if the sidepipe exits are pointed directly out horozontally, or if they are pointed down towards the ground a bit?
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Don't point them down. It blows a crapload of dust all over everything, including your own car. We have a car in our club with pipes turned down and it sucks to be behind him.
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“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.”
www.partskeeper.com
(Less time searching, more time wrenching & driving)
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06-25-2013, 03:01 PM
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CC Member
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Join Date: Jul 2010
Location: Stanwood , WA/Carefree,AZ,
WA
Cobra Make, Engine: Superformance
Posts: 52
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Not Ranked
I have mine pointed slightly up, just enough so that I don't create a dust storm . They look as though they are horizontal, but they are not. I run 3" Chambered with no packing, and have to admit that the sound (noise) can be deafening.
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06-25-2013, 03:56 PM
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CC Member
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Join Date: Dec 2004
Location: Yorba Linda,
CA
Cobra Make, Engine: FFR, V8, Manual Trans, Htr, Wipers, Radio Delete
Posts: 327
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Not Ranked
Is this down or horizontal for you? You decide.
Frank
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FFR - V8, Manual Trans, PS, Inop Wipers, No Radio, Gas Mileage so-so
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06-25-2013, 04:22 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
If you point them straight out or down a lot the sound bounces right back at you. I say turn them down about 15 degrees for look and sound.
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06-25-2013, 04:43 PM
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CC Member
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Join Date: Aug 2010
Cobra Make, Engine: A&C, 358 DRY SUMP BUSH MOTOR 425HP RWH
Posts: 7
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Not Ranked
Icompromised, 45 degrees, sounds real good.
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06-25-2013, 04:57 PM
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CC Member
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Join Date: Oct 2006
Location: Huntsville,
AL
Cobra Make, Engine: SOLD-SPO2660, Southern Automotive 406FE, TKO-600
Posts: 65
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Not Ranked
A couple years ago I redid my entire exhaust system. Mine are set at 72.5 degrees, somewhere in my notes is a reason this is supposed to be optimum, but can't locate them right now. That is close to Mickmate's 15 degrees and I agree that works well.
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Joe
Have fun and enjoy life, because when it is over, it is too late!
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06-25-2013, 05:02 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
Good point that would be 15 degrees from vertical
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06-27-2013, 06:46 AM
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CC Member
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Join Date: Oct 2008
Location: Lions Bay,
BC
Cobra Make, Engine: CAN-AM cobra, 460 SVO
Posts: 326
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Not Ranked
thanks gang, I will try to catch the fabricator before he finishes: slightly down it will be!
__________________
Mark
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06-27-2013, 08:38 AM
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CC Member
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Join Date: May 2009
Posts: 237
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Not Ranked
Quote:
Originally Posted by xlr8tr
thanks gang, I will try to catch the fabricator before he finishes: slightly down it will be!
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Good choice
I had mine vertical - changed them to 45' but changed them very very quickly to approx 10' down ( from vertical) the dust / rocks / ... are a much bigger issue than sound...
Btw. I now have a possibility to change angle on the end of the pipe via a connection ring (that is hidden behind the sheeld) |
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