MasterDave

Went for a two hour ride yesterday and the side pipe noise has got to go. But I love the look. I decided to give my brainstorm idea a try. Couldn't hurt at this juncture, right? I have the 2.5" Sweet Thunders. I cut the back section of outer pipe (about 18") off leaving just the inner baffle showing. Then I drilled more 3/8 holes in the baffle and bent them down so exhaust would flow into the outer shell. I then wrapped the baffle with hi-temp (wood stove heat shield) glass fibers. I've used this before and it does not burn out. I sliced some 3" tubing in half, wrapped and then welded the system. Got one done yesterday, will finish the other side today. Heck of a lot of work just to keep the side pipes but no one has ever accused me of being normal, more like abbey-normal..........I'll snap a before and after pic today and post it here. Hope it works.

wmf62

i've often thought that maybe replacing the entire chambered section with a couple of glasspacks (one or two on each side) might work too; if the OD wasn't too large...
Bill

64tux

i've got glass packs in my hooker sidepipes and they sound loud enough to enjoy the deep sound but not loud enough that you can't hear the radio or talk. thats with the top down. little louder with top up. someday i'd like to see how it sounds with the glass pack out!!!!!!

Kensmith

I had a cross pipe added to my sidepipes and it helped a little. I sure would be interested in getting them a little more quiet. If you can, post some pics of what you did and maybe a video with sound of how they sound. I know there are a lot of guys interested in making our sidepipe cars a little quieter.

OverBudget

Dave,

I don't fully understand what you are doing, but I think it's cool when people get creative ideas. I wanted custom side pipes with no seams (like Hookers) or heat shield (like stock side pipes), so we put our muffler into a 4" pipe and welded it in on the backside so the entire front remained smooth after coating. It looks good, but it is a little loud (I don't have a radio because it probably wouldn't be practical hearing it).

One idea I had during my design phase, was to mount side pipes on the car, but to run an underbody exhaust system that 90'd after the muffler and went into the side pipe exit. That way you would have the side pipe look, the undercar exhaust sound, yet the side pipes would still look like they were working. I got laughed at by the forum when I suggested it though! :-)

Razzle

I've heard guys putting short glasspacks between the exhaust manifold and the sidepipes. It get's pretty hot that close to the engine, so periodic replacement's necessary. A small price to pay if it works. Personally, I never cared for the sound (noise) of Vette sidepipes. Nothing worse than just hearing 4 cylinders blubbering out the drivers window. It just sounds like the motor's not hitting on all 8

Patrick67

I had the original 40 year old sidepipes on my '67. Took them off and put on a set of Allens SS sidepipes. About a year later, I had had it with the noise and put the original pipes back on, that is the way they should sound...mellow. Sold the Allens sidepipes at Carlisle, took about 15 minutes. PT

Wilkinshc

I thought I would try these:

http://store.summitracing.com/egnsea...+115&y=13&x=29

I figured I would running the vortex cones plus the sts baffles. With the two, I hope it would be quiet enough to take on a long trip.

I am using the 4" hooker side pipes. I love the looks but I would like it quiet enough to enjoy a conversation with the passenger.

wmf62

actually, i like the idea...
Bill

wmf62

a crossover pipe would mellow the 'blubbering', it definitely changes the sound on an under-car exhaust...
Bill

sub006

kensmith,

Hint: The larger the diameter of your crosspipe (also called an H-pipe), the greater the sound reduction.

1-2-b-67L89

The original sidepipes sound the best IMO!
Gotta love that creative juice and sharing information

Dave9542

FWIW. A million years ago I had sidepipes removed but left cover, heat shield and bolted a cheater chrome end pipe onto the rear bracket of the shield so it looked like pipes were still functional. Sent exhaust through new set of pipes/glasspack out back under the valance lower edge. Couldn't be seen. Wonderful. I could have a conversation and hear radio and did not lose hearing in left ear. But now that its no longer driven, the pipes are functional again.
Different strokes.
Dave

Kensmith

Post how you like them when you get them. I saw them some time ago but never heard from anyone who has installed them.

Kensmith

I used same size pipe as the down tubes from the headers.

67-427ci

I used a 2" pipe for my crossover. It quieted down my big block quite a bit. My side pipes are Sweet Thunder 2 1/4". Even though it idles & cruises relatively quiet, when you go WOT it is plenty loud.
Roy

Donny Brass

that is how the exhaust runs on a AAR Cuda.........

MasterDave

Pfft, been there, done it. You can indeed stuff the small bullet glas-paks under and it will sound very nice. Unfortunately the back pressure was so great that my engine would not rev past 4000 rpm. Back to the dwg board...

MasterDave

Unfortunately I don't want my wife, grandkids, etc to toast a calf when getting in or out.

MasterDave

Done it, made zero difference. None.