 
Main Menu
|
|
Nevada Classics
|
|
Advertise at CC
|
|
November 2025
|
| 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 |
|
|
|
|
|
|
|
|
CC Advertisers
|
|
03-21-2003, 04:06 PM
|
 |
CC Member
|
|
|
Join Date: May 2002
Location: Right in the middle of the beautiful Texas Hill Country - Boerne, Texas,
Posts: 681
|
|
Not Ranked
Can I open up the sidepipes?
Has anyone ever taken the "baffle'ing" out of their sidepipes and ran open pipes?!
just curious 
Blake
__________________
"They're lining up on both sides of the ocean..
and nobody's willing to compromise
in the search for the smoking gun..."
"Charlie Don't Surf!"
|
-
Advertising
03-21-2003, 05:17 PM
|
 |
CC Member
|
|
|
Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
|
|
Not Ranked
Very loud, draws a ton of attention, very cool.
__________________
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
|
03-21-2003, 05:46 PM
|
 |
(An All-Around Nice Guy)
|
|
|
Join Date: Aug 2000
Location: Camden,
SC
Cobra Make, Engine: Unique Motorcars (sold)
Posts: 1,582
|
|
Not Ranked
Mine are practically open. I can use a flashlight and a small mirror at the outlet end and clearly see the four collector tubes at the other end. Makes for a wonderful sound. Mine came this way from Unique.
Keith 
__________________
Keith
Former Unique owner.
|
03-21-2003, 06:11 PM
|
|
CC Member
|
|
|
Join Date: Nov 2000
Location: Menasha,
WI
Cobra Make, Engine: B+B 351w #112
Posts: 600
|
|
Not Ranked
I don't know what B+B uses for baffling in their side pipes. Mine seem to be getting louder the more I drive it. Jim
|
03-21-2003, 06:39 PM
|
 |
Administrator
|
|
|
Join Date: Jan 1999
Location: Duvall,
Wa
Cobra Make, Engine: KMP286, Shelby 482, Webers, 593HP
Posts: 4,162
|
|
Not Ranked
Mine are pretty much straight pipes although I use a dynomax bullet track only muffler (find them at Summit). Not much in the way of baffle, as there's nothing restricting flow. Loud and sound great.
|
03-21-2003, 07:10 PM
|
 |
Senior Club Cobra Member
|
|
|
Join Date: Nov 2001
Location: Kountze,
TX
Cobra Make, Engine: CMC, 351 Cleveland, Dual Quads, C6
Posts: 1,377
|
|
Not Ranked
I can take the baffles out of my sidepipes very easily. Real loud and obnoxious. Just the way it should be! 
__________________
David Shelton
Lone Star Gashole!
|
03-21-2003, 07:43 PM
|
 |
CC Member
|
|
|
Join Date: Apr 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 1,112
|
|
Not Ranked
I think there are two issues here. One is the baffling--it can be removed/replaced, etc. The other issue is the size of your collectors. A lot of them are around 2", which is really the restriction--not so much the baffles.
I had my pipes done. This consisted of cutting them open and opening the collector to 3", then put racing mufflers in and wow, what a difference. Sound is acceptable at idle (barely) and quite loud under throttle. Made a lot more power.
I highly recommend this place:
JBA Racing
__________________
Bill Malone
Gashole
CSX4786
Last edited by bmalone; 03-21-2003 at 07:46 PM..
|
03-21-2003, 07:49 PM
|
 |
CC Member
|
|
|
Join Date: Sep 2000
Location: Monett,
MO
Cobra Make, Engine: 2 Seat Roadster-by B&B, 460+ w/auto.
Posts: 437
|
|
Not Ranked
Blake, call Bryan and have Barry make you up a set of shorty's. Collector to turnout. No muffler in between.
Ron
__________________
Ron
Nonconformist. Can't handle a real job.
|
03-24-2003, 07:44 AM
|
|
CC Member
|
|
|
Join Date: May 2002
Location: Right in the middle of the beautiful Texas Hill Country - Boerne, Texas,
Posts: 681
|
|
Not Ranked
Ron,
I was just going to have the local welding shop open them up, remove whatever is in there, and re-weld them...
I started the motor with just the headers yesterday..man...drove down the driveway and back...lot's of "poppin", backfiring, etc...
is that normal??
blake
__________________
"They're lining up on both sides of the ocean..
and nobody's willing to compromise
in the search for the smoking gun..."
"Charlie Don't Surf!"
Last edited by Blake Olson; 03-24-2003 at 07:49 AM..
|
03-24-2003, 09:10 AM
|
|
CC Member
|
|
|
Join Date: May 2002
Location: San Diego,
CA
Cobra Make, Engine: SPF - 427 Stroker
Posts: 721
|
|
Not Ranked
Quote:
Originally posted by Blake Olson
I was just going to have the local welding shop open them up, remove whatever is in there, and re-weld them...
I started the motor with just the headers yesterday..man...drove down the driveway and back...lot's of "poppin", backfiring, etc...
is that normal??
blake
|
Blake - You do need a certain amount of backpressure otherwise you will have that backfiring and poping...And, you also get too much backpressure when you try and hollow out the pipes and make the exhaust run that far - it can actually cause you to drop hp...The "shorty" method Slow Dawg mentioned is usually the best solution - for the track...Doing it on the street might attract a little TOO much attention.
__________________
NEVER LIFT
|
03-24-2003, 09:16 AM
|
|
CC Member
|
|
|
Join Date: May 2002
Location: Right in the middle of the beautiful Texas Hill Country - Boerne, Texas,
Posts: 681
|
|
Not Ranked
Maybe I can have them take "some" out but leave some in!? Not even sure what's really in the pipes.
what's the "shorty" method?
blake
__________________
"They're lining up on both sides of the ocean..
and nobody's willing to compromise
in the search for the smoking gun..."
"Charlie Don't Surf!"
|
03-24-2003, 09:50 AM
|
|
CC Member
|
|
|
Join Date: Apr 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 1,112
|
|
Not Ranked
Blake, why not use racing mufflers inside the pipes? That and opening the collector to 3" gave me a signifigant improvement.
__________________
Bill Malone
Gashole
CSX4786
|
03-24-2003, 10:43 AM
|
|
CC Member
|
|
|
Join Date: Oct 2000
Location: Crystal Lake,
IL
Cobra Make, Engine: Everett-Morrison, 434 cid
Posts: 977
|
|
Not Ranked
I made my own sidepipes. I bought a cheap pair of 4" glass packs, cut them open and removed the core. Then I made my own cores by taking a piece of 3-1/2" pipe and milling slots in it that are 3/16" wide x 2" long. The slots run length-wise, all the way around and the full length of the core. I wrapped the core with stainless steel wool, slid the outer shell over it and rewelded. The more slots you mill in the core the quieter the pipe will be.
Performance is the same as 3-1/2" straight pipes. They are loud but the high pitch ringing is eliminated.
I made these because my carbs are all calibrated for open headers.
The standard straight core glass pack uses up to a 3" louvered core (in the 4" OD models) and I can't run them with out recalibrating my carb.
Scott
|
03-25-2003, 01:46 PM
|
|
CC Member
|
|
|
Join Date: May 2002
Location: Right in the middle of the beautiful Texas Hill Country - Boerne, Texas,
Posts: 681
|
|
Not Ranked
I went to go "inspect" the inside of the pipes just a few minutes ago...basically there is an insert with cut outs surrounded by fiberglass??
I think i will just take the fiberglass out...
what effect will this have?
thanks
blake
__________________
"They're lining up on both sides of the ocean..
and nobody's willing to compromise
in the search for the smoking gun..."
"Charlie Don't Surf!"
|
03-25-2003, 01:58 PM
|
|
CC Member
|
|
|
Join Date: Jul 2002
Location: rocky river,
Oh
Cobra Make, Engine: Unique 289FIA / SA 351W / a truly glorious machine
Posts: 3,949
|
|
Not Ranked
Not to bring down the "wrath of God" on me, but on the flip side of this discussion-- How would you quiet them down a bit.?????
Last edited by casaleenie; 03-26-2003 at 07:01 AM..
|
03-25-2003, 02:04 PM
|
|
Senior Club Cobra Member
|
|
|
Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
|
|
Not Ranked
I "blew out" the baffles in the Excal by simply downshifting WAY to early and hitting high rpm with the engine. Worked great, all though I wasn't TRYING to downshift early,,,,, That corner at the end of the straight comes up REAL fast and sometimes I got "nervous", lol.
Wouldn't recommend this method to anyone with an FE.........
Ernie
|
03-25-2003, 02:05 PM
|
|
CC Member
|
|
|
Join Date: Jul 2002
Location: Portland, OR area,
OR
Cobra Make, Engine: Contemporary CCX33868 Sold. Just "playin' the boards now."
Posts: 634
|
|
Not Ranked
Blake,
My "mufflers" came from Butler Racing and were welded onto the short collector. The turnout is part of the muffler. If you want loud, they'll do it in spades. Calling them mufflers is almost a joke.
Butler put in a spiral wound core and nothing else. They were loud new, but never changed. With my compression, they had a nice bark at idle and would just about take your head off when the rpm's were up!
My engine was dynoed with them on the engine and it still made nearly 500hp.
Oh, btw, dogs don't like them at all! There is a high pitched resonance that they can hear and we can't.
Also, I never even had a cop look at me for the noise. Mostly they just grinned when they saw and heard the car.
Try the Butlers. I guarantee you'll like them.
Al
__________________
"If some is good, more is better.
And too much is just enough."
--Carroll Shelby
|
03-25-2003, 02:14 PM
|
|
CC Member
|
|
|
Join Date: May 2002
Location: Right in the middle of the beautiful Texas Hill Country - Boerne, Texas,
Posts: 681
|
|
Not Ranked
My question is,
do I need to remove the inner part of the pipe? it's a insert of sorts with nickle sized holes bent, to create turbulence I assume..or should I leave it in there and just remove the fibeglass surrounding it?!
blake
__________________
"They're lining up on both sides of the ocean..
and nobody's willing to compromise
in the search for the smoking gun..."
"Charlie Don't Surf!"
|
03-27-2003, 05:49 PM
|
|
Club Cobra Member
|
|
|
Join Date: Mar 2000
Location: Chino Hills,
CA
Cobra Make, Engine: B&B 408W, TKO 600, 9" 4-link Truetrac, 13" X 1 3/8" curved vane frt disks
Posts: 205
|
|
Not Ranked
scottj,
You put a 3.5" core inside a 4" pipe? Does that mean you only had 1/4" clearance to stuff the wool in? How may slots did you cut?
|
03-27-2003, 07:45 PM
|
|
CC Member
|
|
|
Join Date: Oct 2000
Location: Crystal Lake,
IL
Cobra Make, Engine: Everett-Morrison, 434 cid
Posts: 977
|
|
Not Ranked
DaveR,
Yes, yes, 91. Correction: not a 1/4", closer to .190
You can't believe it fits can you?
I cut 13 slots around the circumference by 7 slots lengthwise over 24". I wrapped the core with a fine stainless steel wool from a 12" wide roll and wrapped that with wire to hold it tight. Then I took a tapered style piston ring compressor for a 4" bore and turned a step in it on the lathe so it could be tightened securely on the end of the 4" pipe. Then the core could be shoved in without snagging on the outer pipe.
If you don't mind the look of a 5" pipe they could be allot quieter and still perform like an open pipe. Although a 3-1/2" core will never be "quiet".
Last edited by scottj; 03-27-2003 at 08:39 PM..
|
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 On
|
|
|
All times are GMT -7. The time now is 12:17 PM.
|
Linear Mode
