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01-08-2012, 09:14 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Sidepipe Turnouts
I'M in the process of changing the mufflers on my sidepipes. Should I angle the turnouts down a little? I've read 10 degrees max. Any thoughts? Better yet, any pics?
Thank you:
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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01-08-2012, 09:18 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,310
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Not Ranked
Yes, but not too much over that, as it becomes a debris thrower.
__________________
Regards,
Kevin
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01-08-2012, 09:25 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Does it really make a sound difference inside the car, or are people imagining?
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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01-08-2012, 10:00 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,310
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Not Ranked
It can't be much, if any.
__________________
Regards,
Kevin
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01-09-2012, 03:27 AM
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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
I have found if you angle it down too much you are reflecting sound back at yourself off the road. Save that for the tunnels, you don't want it all the time.
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01-09-2012, 10:34 AM
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CC Member
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Join Date: Dec 2010
Location: Allen,
TX
Cobra Make, Engine: Werk77 289FIA
Posts: 1,295
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Not Ranked
No down turn for me - it would just kill the classic look...
__________________
Scratch build 289 FIA see the Scratch builder forum on CC - sold
DRB GT40 MK1 red #49- sold
FF5 Mk4 #7733 302/T5/IRS - dark blue - sold
FF5 MK4 #7812 427/TKO/IRS - Guardsman Blue - sold
FF5 MK4 #8414 501/TKO600/48IDA Ollie the Dragon #91 - sold
FF5 Daytona Coupe 347/TKO/IRS Homage CSX2299 Viking Blue - sold
SPF 2063
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01-09-2012, 12:16 PM
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CC Member
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Join Date: Oct 2003
Location: Queen Creek,
AZ
Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection
Posts: 906
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Not Ranked
Pete,
The classic look also includes four pipes exiting the fender... Just sayin'...
__________________
E. Wood
ItBites
10.69 @ 129.83mph - on pump gas and street tires
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01-09-2012, 02:38 PM
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CC Member
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Join Date: Dec 2000
Location: Livermore,
CA
Cobra Make, Engine: ERA #629, BBM Side Oiler Block, 482ci, Richmond 5 speed
Posts: 853
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Not Ranked
The driver's side pipe on my car is perfectly horizontal. For whatever reason, the passenger side pipe angles down very slightly. I've never measured how much but I'm sure it's less than 10 degrees. The angled down pipe is a pain in the ass everytime I pull into a dusty parking lot or I pull off the edge of the road somewhere. It blows dust everywhere. It gets my car and everyone elses car filthy. If I were you, I'd make them come out as perfectly horizontal as possible just to avoid the dust storm. I don't think you'll notice any difference in sound.
Chris
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01-09-2012, 02:40 PM
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CC Member
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Join Date: Dec 2000
Location: Livermore,
CA
Cobra Make, Engine: ERA #629, BBM Side Oiler Block, 482ci, Richmond 5 speed
Posts: 853
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Not Ranked
Jeff,
By the way, what mufflers are you changing from and to? Do you have the ERA stainless pipes or something else? I'm about to change out my stainless sidepipe mufflers to try and quiet mine down a bit.
Chris
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01-09-2012, 05:04 PM
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CC Member
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Join Date: Oct 1999
Location: Prosper,
TX
Cobra Make, Engine: CAV GT40 #169, Ford 408 Stroker & ZF Transaxle
Posts: 2,408
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Not Ranked
Kicks up too much dust turned down......Cobras are suppose to be noisy. Mine are 4 inch Howell Racing Mufflers with 3 1/2 ID turned around. Sounds nice........
__________________
Gary
CAV GT40
Last edited by gsharapa; 01-09-2012 at 05:20 PM..
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01-09-2012, 05:14 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Quote:
Originally Posted by ItBites
Pete,
The classic look also includes four pipes exiting the fender... Just sayin'...
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And no flanges, and a larger dia. and shorter muffler. Sorry
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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01-09-2012, 05:22 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
Mine are down about 10 degrees which I think shows a little respect for the guy in the lane next to you. And yes it does make a positive difference on your ears. Also, the dust argument sounds good but has no traction. Actually the 90° turnouts are more obnoxious as they blast everything the tires kick up straight at the guy next to you . Not cool IMHO.
Frank
__________________
FFR - V8, Manual Trans, PS, Inop Wipers, No Radio, Gas Mileage so-so
Last edited by Frank Messina; 01-09-2012 at 05:40 PM..
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01-09-2012, 06:15 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Quote:
Originally Posted by CJ428CJ
Jeff,
By the way, what mufflers are you changing from and to? Do you have the ERA stainless pipes or something else? I'm about to change out my stainless sidepipe mufflers to try and quiet mine down a bit.
Chris
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I have stock steel ERA pipe. I am changing to these:
Howe Racing Enterprises - Duals
Howe Racing H3002 - Howe Dual Mufflers - Overview - SummitRacing.com
I hate the neighbours 
I hope to pick up 50 HP.
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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01-09-2012, 09:05 PM
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Senior Club Cobra Member
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Join Date: Dec 2007
Cobra Make, Engine: ERA FIA 'Street' Build
Posts: 2,128
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Not Ranked
Quote:
Originally Posted by ItBites
Pete,
The classic look also includes four pipes exiting the fender... Just sayin'...
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Quote:
Originally Posted by Jeff Frigo
And no flanges, and a larger dia. and shorter muffler. Sorry
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Looks like Pete is building an FIA, so no pipes through the fender ... now the flanges, can't say as I have seen a setup like that before. Ceramic coat the whole setup black or silver ... probably look pretty good  |
01-10-2012, 06:31 AM
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CC Member
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Join Date: Dec 2010
Location: Allen,
TX
Cobra Make, Engine: Werk77 289FIA
Posts: 1,295
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Not Ranked
Quote:
Originally Posted by ItBites
Pete,
The classic look also includes four pipes exiting the fender... Just sayin'...
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Not on a 289, nice try but no cigar...
__________________
Scratch build 289 FIA see the Scratch builder forum on CC - sold
DRB GT40 MK1 red #49- sold
FF5 Mk4 #7733 302/T5/IRS - dark blue - sold
FF5 MK4 #7812 427/TKO/IRS - Guardsman Blue - sold
FF5 MK4 #8414 501/TKO600/48IDA Ollie the Dragon #91 - sold
FF5 Daytona Coupe 347/TKO/IRS Homage CSX2299 Viking Blue - sold
SPF 2063
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01-10-2012, 07:11 AM
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CC Member
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Join Date: Dec 2010
Location: Allen,
TX
Cobra Make, Engine: Werk77 289FIA
Posts: 1,295
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Not Ranked
Quote:
Originally Posted by tkb289
Looks like Pete is building an FIA, so no pipes through the fender ... now the flanges, can't say as I have seen a setup like that before. Ceramic coat the whole setup black or silver ... probably look pretty good |
The 289FIA's were highly modified - especially in Europe, there is almost no "norm" on the exhaust systems. The cars had to be street legal and registered. That had large influence on the cars.
The canisters had the red paint on from factory, the car is middle of the build thus it is not the final color. I can see ceramic coated headers and down pipes but it is just wasted money on the canisters.
The coating is applied to keep the exhaust gas as hot as possible to assure the fast travel.
__________________
Scratch build 289 FIA see the Scratch builder forum on CC - sold
DRB GT40 MK1 red #49- sold
FF5 Mk4 #7733 302/T5/IRS - dark blue - sold
FF5 MK4 #7812 427/TKO/IRS - Guardsman Blue - sold
FF5 MK4 #8414 501/TKO600/48IDA Ollie the Dragon #91 - sold
FF5 Daytona Coupe 347/TKO/IRS Homage CSX2299 Viking Blue - sold
SPF 2063
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01-10-2012, 08:13 AM
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CC Member
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Join Date: Mar 2011
Location: Sleepy Hollow,
IL
Cobra Make, Engine: Kirkham #647 brushed
Posts: 412
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Not Ranked
Hey Jeff,
I just welded up the exhaust on the Kirkham, with about 10 degrees, maybe a tiny bitmmore, on the turn downs. I'm not sure where ypu are located in Chicago but I'm just north of Elgin, and south of Dundee, if you are interested in checking them out in person. I found a good method of measuring the amount of angle so that they are both the same on each side. I'll PM you.
Here are some pics of the turn downs. It is nothing radical but will help a bit with the sound.
Arnaud
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01-10-2012, 09:28 AM
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CC Member
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Join Date: Sep 2009
Location: Hideaway, Texas,
TX
Cobra Make, Engine: Backdraft #318, 418 CI, 532 RWHP, Mass Flow Injected, TKO600-Road Race, BMW M3 Suspension, Race Springs (Wouldn't do it again, rough on the street).
Posts: 240
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Not Ranked
Other options. Took this strolling around at Laguna Seca one afternoon. No idea of the heritage or owner, but enough info on the side of the car to get you there I bet if you are interested.
__________________
Wayne Rogers in Hideaway, Texas
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01-10-2012, 11:43 AM
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CC Member
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Join Date: Dec 2000
Location: Livermore,
CA
Cobra Make, Engine: ERA #629, BBM Side Oiler Block, 482ci, Richmond 5 speed
Posts: 853
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Not Ranked
Quote:
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Also, the dust argument sounds good but has no traction.
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Hmm, I can't vouch for your experiences but they sure are contradictory to mine and anyone that has ever parked next to me in a dusty parking lot. |
01-10-2012, 12:39 PM
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CC Member
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Join Date: Feb 2006
Location: Thousand Oaks,
CA
Cobra Make, Engine: Classic Roadster
Posts: 1,369
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Not Ranked
My pipes are turned down slightly. I am aware that they do blow the dust and so I am careful not to rev the rpms up while next to other cars. A few weeks ago we cruised to lunch after our local toy drive and as I am backing into my parking space, which had an accumulation of leaves on the ground, my exhaust blew them like a leaf blower all over and into the CSX next to me. Oh boy did I feel bad. If I were to do it again I would turn them straight out. I hate being "That Guy".
John
Last edited by MaSnaka; 01-10-2012 at 12:40 PM..
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