I need to be baffled!

pcoghlan · #1 (**permalink**) 06-20-2005, 09:27 AM

I need to quieten down the side pipes on my Lonestar. Is there an economically viable way of doing this or am I going to end up spending enough that I might as well simply buy a new set?

i.e. is there a way to insert baffles?

Paul

Ron61 · #2 (**permalink**) 06-20-2005, 09:38 AM

Paul,

I am not sure where they got them but some of the people around here got baffles that you can insert from one to six sets of in each pipe. They just took the side pipes off and inserted them from the end that the collector feeds into. I think they drilled small screw holes in the bottom or backside of the pipes where they won't show and and used screws to ancor them so they won't rattle. The more you put in the quiter, but also the more power you lose as it will choke the exhaust down some.

Ron

pcoghlan · #3 (**permalink**) 06-20-2005, 10:06 AM

Thats absolutely what I am after, perfect.

So, does anyone know where I can get these?

Paul

shaps · #4 (**permalink**) 06-20-2005, 10:26 AM

Supertrapp (from summit racing)

elgecko · #5 (**permalink**) 06-20-2005, 10:34 AM

I have a set of these that I'm going to try.
Check out:
http://www.carchemistry.com/ccinserts.html
Dave
elgecko

pcoghlan · #6 (**permalink**) 06-20-2005, 02:26 PM

shaps, to be honest I dont think that would look great on the end of the side pipes and anyway the end of the pipes are slanted so I dont think they would even fit.

elgecko, let me know what sort of reduction in noice you see. Will they fit into the side pipes? The end of my pipes angle away from the car slightly at the end, effectively creating a bend which I dont know if they could get around?

cobrashoch · #7 (**permalink**) 06-20-2005, 07:25 PM

O.K. - You might try this cheap way to silence pipes and I think you will be amazed. It does require a trip to the hardware store and some simple fab work and a few brains.

Cut a piece of flex tubing about 4 or 6 inches long that's the closest diameter to the inside diameter of your side pipes. Buy some stainless steel screen to fab up end caps on both ends of the flex pipe, then fill the trap up with stainless steel pot scrubber pads.
The last set I made had a 2 3/8" pipe that went through the middle of the trap surrounded by the pads. You can tune the sound that you want by varying the number of pads that you use by cutting the trap shorter or longer, and the optional diameter of the short piece of pipe inside will give you your performance and some sound. The flex pipe will wiggle and bend around the exit of the side pipe up into the side pipe where you can screw it into the pipe with a couple of stainless screws. The last set I made was a little longer where I attached 2 handles on the flex pipe that also suported the center pipe, and the handles made it a snap to pull them out. That way you can reach up there and wiggle the traps in or out according to the current noise level that you want. Pretty simple really and it requires 6 or 8 pads per side. Later,,,,,,,,,,,,,,,,,,,,,,,,,,,
cobrashock

cobrashoch · #8 (**permalink**) 06-26-2005, 06:04 PM

vettestr · #9 (**permalink**) 06-26-2005, 07:28 PM

Just another idea. The measurements of the sidepipes should accept a good old cherry bomb muffler. The outer diameter of muffler is about 3 3/8 inches with the ID at 2 1/2. Weld an adapter to center and seal each end agianst the ID of the side pipe. Think of a big washer for a mental picture. Washer would be just under 4 OD with center hole at 2 1/2 welded to each end of the cherry bomb that is 28 inch long.

cobra427mnsi · #10 (**permalink**) 06-26-2005, 08:31 PM

Paul

check out this web site. http://www.spiralturbobaffles.com/
I just returned from DVSF V. This guy had a demo set up. He also donated a set of these pipes for the auction. I won the auction. It will take me a few weeks to make everything fit etc. So, I don't know how they sound yet. However, a couple of guys I talked to had them and liked them.

Paul

Mr.Fixit · #11 (**permalink**) 06-26-2005, 10:25 PM

Just cut out the bulging center section of the sidepipes and weld in a replacement center section that is baffled better. You gotta find one with the right diameter however.

wtm442 · #12 (**permalink**) 06-27-2005, 05:05 AM

quote

I need to quieten down the side pipes on my Lonestar. Is there an economically viable way of doing this or am I going to end up spending enough that I might as well simply buy a new set?

Unquote

Why do you NEED to make them quiet?

Don't want to wake the neighbors? Make sure you take them for a ride sometime.

It's too loud for your sensitive ears? Buy some earplugs.

Getting stopped by the law? Make the suggested changes or tell them its stock and pray a lot.

Sounds like there are NO mufflers at all? Guess you do not like the sounds of an open headered race car.

Great thread - mine sounds OK to me, but I always get comments about the loud exhaust noise from people (not my neighbors), but they are probably used to absolute quiet inside their luxomobile with premium sound system.

Just my 2 cents worth. Hope the fix makes them sound really mello, and sounding sweet to all that hear them.

Don · #13 (**permalink**) 06-27-2005, 05:37 AM

Paul, the approach I used for rebuilding the side pipes : Combination of CC Discs ( 3 ) , spiral muffler and the Vortex Cone.

Prior to taking this approach, had contacted a number of muffler manufacturers for a " quiet " Cobra style/size muffler, none had the alternative I was looking for.

CR Side Pipe Rebuild

jarendall · #14 (**permalink**) 06-28-2005, 12:55 AM

I tried the stainless steel cones or vortexs from Jegs, they seem to help a little, if I turn my radio all the way up with the top on the car I can hear a little music, most cobras are not quiet.

jarendall

jarendall · #15 (**permalink**) 06-28-2005, 01:02 AM

Jegs also has the baffle inserts, they are normally used in a header collector and not in a side pipe, don't know if they will work

jcl79383 · #16 (**permalink**) 06-30-2005, 05:11 AM

Paul. Keep me posted on your install. This is a simple way to "fix" a problem with the Cobra sidepipes. The cones, disks, and other spiral set ups just don't work as good as the STS Baffles. Although, there are different "mousetraps" for different people. Just depends on what you want.

Cole Cacciavillani in Leamington has run the baffles for several years in his 66 Vette..............

Anyway, keep me posted on your results. Any questions e-mail me.

Thanks, JIM LAUGHLIN / Spiral Turbo Specialties

solly · #17 (**permalink**) 07-06-2005, 10:36 PM

Here is an interesting solution suggested by the Porsche Club due to really stringent noise levels at Lime Rock last year.

This is my 360 Challenge with advanced noise suppression acquired in the canned goods aisle of a local deli. I did this after I got black flagged for noise. Amazingly, it worked perfectly. Only later did we discover that heat buildup melted one of my oil cooler lines.

Anyway, sold that car and am now the proud owner of a Superformance Daytona coupe which has real and very loud side pipes. No way will they pass at some of the tracks. I tried the Vortex cone mufflers, but they only quieted things down a little (I just shoved them up the tailpipe and tack welded them). I too need some real sound reduction, but don't want to lose too much hp in back pressure. The Brillo pads seem like a good short term solution, but what kind of hose do you use so it won't melt? And how about back pressure?

If anyone finds a simple easy slip-in solution (my side pipes have turnouts, so it needs to be something flexible), please post it here.