Main Menu
|
Nevada Classics
|
Advertise at CC
|
S |
M |
T |
W |
T |
F |
S |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
|
|
|
|
|
CC Advertisers
|
|
16Likes
03-30-2017, 11:56 AM
|
CC Member
|
|
|
Join Date: Dec 2015
Posts: 1,442
|
|
Not Ranked
The Flowmasters will be here today. I hope to have them welded up next week.
I'll post some DB readings as well.
BTW Summit has them on sale.
|
03-30-2017, 01:36 PM
|
CC Member
|
|
|
Join Date: Oct 2013
Cobra Make, Engine: Backdraft #1333, Smeding 427
Posts: 93
|
|
Not Ranked
Burns Stainless
Mark at Breeze suggested that his pipes, which are not fitted for a Backdraft anyway but I could cut my pipes, won't reduce the sound level as much as I would like.
I also contacted Burns Stainless. Their race mufflers could be a great solution, but still researching.
Burns Stainless LLC - Ultra-Light Mufflers ~ 2-Stage
|
03-30-2017, 04:51 PM
|
CC Member
|
|
|
Join Date: May 2015
Location: Mokena,
IL
Cobra Make, Engine: Backdraft SBF-302
Posts: 325
|
|
Not Ranked
^^^
isn't it hard to sleep at night, knowing your Cobra is being choked?
mine will be on soon, need driving weather.
|
04-23-2017, 10:26 AM
|
Registered User
|
|
|
Join Date: Mar 2017
Cobra Make, Engine:
Posts: 2
|
|
Not Ranked
Side pipes
I have an early build with slide in side pipes, not the newer flange. they are muffled.I would consider a trade if you are still looking.I am looking for more db's
|
04-23-2017, 11:27 AM
|
CC Member
|
|
|
Join Date: May 2015
Location: Mokena,
IL
Cobra Make, Engine: Backdraft SBF-302
Posts: 325
|
|
Not Ranked
The 30" Flowmasters aren't your answer
They sound quiet in the garage at start up
In the tunnels at WOT, you're not passing any Db test.
|
04-24-2017, 02:10 PM
|
CC Member
|
|
|
Join Date: Jun 2016
Location: Basel,
Bas
Cobra Make, Engine: Hawk 289 USRRC, 302 Ford
Posts: 42
|
|
Not Ranked
Quote:
Originally Posted by Ozzie Goat
They sound quiet in the garage at start up
In the tunnels at WOT, you're not passing any Db test.
|
This is perfect as the DB test will not happen in a tunnel nor at wot
|
05-27-2017, 04:43 PM
|
|
CC Member
|
|
|
Join Date: Sep 2006
Location: Highland,
MI
Cobra Make, Engine:
Posts: 221
|
|
Not Ranked
Quote:
Originally Posted by spdbrake
The Flowmasters will be here today. I hope to have them welded up next week.
I'll post some DB readings as well.
BTW Summit has them on sale.
|
Well - what were your results?
|
05-27-2017, 04:44 PM
|
|
CC Member
|
|
|
Join Date: Sep 2006
Location: Highland,
MI
Cobra Make, Engine:
Posts: 221
|
|
Not Ranked
Quote:
Originally Posted by spdbrake
|
Not to mention the major backlash when the exhaust hits the "wall" at the inlet!
|
05-27-2017, 05:33 PM
|
CC Member
|
|
|
Join Date: Dec 2015
Posts: 1,442
|
|
Not Ranked
Not installed yet. I finally finished up the polishing the new mufflers last week.
Although I'm still considering White ceramic coating once they're all done.
(Not too fond of the bling bling with the stainless system.)
|
05-27-2017, 05:36 PM
|
|
CC Member
|
|
|
Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
|
|
Not Ranked
My Gilmore 304 highly polished Stainless Steel kit.
The Gilmore Kit-
Firefly teamed up with the Stainless Works team and is now proud to offer the Gilmore side pipe kit. This kit is 100% polished 304 stainless steel and has long legged 2-inch primary tubes to enable you to trim to fit your car. The kit includes the primaries to the turnout and will be available in 3 muffler configurations, from 2 inch to a 3 inch internal bore mufflers. All pieces are shown in the pictures.
A special thanks to the SW team for their efforts in helping make this a realit
Muffler can be changed out for your DB of choice.
3" muffler - Most performance at the cost of some increase in sound
2-1/2" muffler - A step in the middle
2" muffler - Close to stock in sound with improved performance
Firefly Stainless Steel performance pipes have been designed
__________________
Regards,
Kevin
|
05-27-2017, 05:51 PM
|
|
CC Member
|
|
|
Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,307
|
|
Not Ranked
Some photo's. The collector is not reduced to rob HP.
(I'll have to reduce my pixel count to attach more photo's)
Here's my original thread link in 2009.
I have polished stainless pipes as a kit.
__________________
Regards,
Kevin
Last edited by FUNFER2; 05-27-2017 at 06:11 PM..
|
06-01-2017, 12:11 PM
|
CC Member
|
|
|
Join Date: May 2014
Location: Tavares,
FL
Cobra Make, Engine: Backdraft #832
Posts: 227
|
|
Not Ranked
Side Exhause
I talked to Firefly about a year ago and was told by them they only produce exhaust for the Superformance cars. Sure wish they would make them for the Backdraft cars as what you get from them is very poor quality. I know I have a set from them.
|
06-01-2017, 12:39 PM
|
CC Member
|
|
|
Join Date: Dec 2015
Posts: 1,442
|
|
Not Ranked
Got my DB meter in this week.
New SS collector hardware arriving today from www.McMaster.com
Just waiting on the Welder to have time to come do it.
I need to do some baselines this weekend based on what the OP had experienced at Laguna Seca. Meter is located 50ft from the race line of the track per this video.
https://www.youtube.com/watch?v=lkZYVj89fA0
|
06-28-2017, 07:50 PM
|
CC Member
|
|
|
Join Date: Dec 2015
Posts: 1,442
|
|
Not Ranked
Finally got the Flowmasters welded up yesterday.
Had to have the BDR pipes expanded a fat 1/8" for the diameter difference.
The casings stay pretty cool and you can lay your hand on em but we'll see once I hit the highway.
They are quieter for sure and I'll post some DB numbers this weekend.
|
07-05-2017, 05:23 PM
|
CC Member
|
|
|
Join Date: Dec 2015
Posts: 1,442
|
|
Not Ranked
Finally got all the DB readings.
Since the OP was having issues with passing Laguna Seca's DB limits I measured using the track distance listed on their website.
All taken at 50ft distance perpendicular to the side of the car.
Stock BDR exhaust: Idle 82DB, WOT 4500 102DB
Flowmaster 30" slimlines Idle 72.5DB, WOT 4500 97.9db
|
07-06-2017, 02:46 AM
|
CC Member
|
|
|
Join Date: Jun 2016
Location: Basel,
Bas
Cobra Make, Engine: Hawk 289 USRRC, 302 Ford
Posts: 42
|
|
Not Ranked
I also just finished my new sidepipes, including a 200 cell race cat and the 30'' Slimelines.
Cobra sounds still very good, but no earplugs needed any more...way to go!
|
07-06-2017, 04:50 PM
|
|
CC Member
|
|
|
Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,908
|
|
Not Ranked
Quote:
Originally Posted by spdbrake
Finally got all the DB readings.
Since the OP was having issues with passing Laguna Seca's DB limits I measured using the track distance listed on their website.
All taken at 50ft distance perpendicular to the side of the car.
Stock BDR exhaust: Idle 82DB, WOT 4500 102DB
Flowmaster 30" slimlines Idle 72.5DB, WOT 4500 97.9db
|
Those are huge reductions in sound levels. Impressive. Any hit on power?
__________________
Brian
|
07-06-2017, 05:12 PM
|
CC Member
|
|
|
Join Date: Dec 2015
Posts: 1,442
|
|
Not Ranked
|
07-06-2017, 05:45 PM
|
|
CC Member
|
|
|
Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,908
|
|
Not Ranked
Quote:
Originally Posted by spdbrake
|
Butt Dyno? I'll put that on my Christmas Wish List.
Less noise, better tone (??) and more power. Win / win / win.
__________________
Brian
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -7. The time now is 06:22 PM.
Links monetized by VigLink
|