Mufflers & Shroud Advice Needed

[Ratnest]

Because of being snowed/iced in..I'm making good progress on the 66 C10. When the weather permits I will trailer Ratnest to the muffler shop. I could sure use some good advice on what mufflers to get. I want a good throaty sound but do not want to hear a lot of noise inside the cab. I think the mufflers will be positioned about a foot or so behind the cab. Any suggestions?

Also, I've scoured the local vintage junk yard and cannot find a shroud that's worth using. I've reconditioned the stock radiator and will be running a 18" flex-fan. LMC sells the original shroud for $160...which is way too costly for me. Maybe I should just have one made at the local sheet metal shop. Again, some advice would be appreciated.

 

[Rich 5150 69]

Ratnest its all a matter of personal choice, my preferance here`s the flow master sound bites on youtube, remember tailpipes make a big differance.
The shroud if you can find a used one is quite nice piece.
http://www.youtube.com/watch?v=YlGqSd7QjWQ

 

[Lakeroadster]

Full Length Tailpipes

The key to keeping noise out of the cab is full length tailpipes. I have glass packs on my truck which are loud. But inside the truck it is fine. The tailpipes exit out the back at the far edge of the rear fenders.

I ran the exhaust in a non-conventional manner, on the outside of the frame rails.

http://www.youtube.com/watch?v=NjXdq3TC9eM&list=UUHxXaiy5M5Y5LzeJZU7cBxA

Hope that helps.

John

 

[Ratnest]

Ratnest its all a matter of personal choice, my preferance here`s the flow master sound bites on youtube, remember tailpipes make a big differance.
The shroud if you can find a used one is quite nice piece.
http://www.youtube.com/watch?v=YlGqSd7QjWQ

Thanks...I listened to the flowmaster tests, and honestly, I didn't care for any of the sounds. I want a deeper tone. The test motor, a SBC 406, is much more powerful than my SBC 260 HP will be and the test sounds on the web site probably won't match those of my motor.

 

[Ratnest]

Hey Lakeroadster....I viewed and listened to your video. That's more like the sound I want. SO...I guess you think I should put the cherry bombs under the cab with longer pipes. Is that right? Will my plan to put them behind the cab with shorter tail pipes that exit under the bumper cause me more noise in the cab? Thanks.

 

[Lakeroadster]

Hey Lakeroadster....I viewed and listened to your video. That's more like the sound I want. SO...I guess you think I should put the cherry bombs under the cab with longer pipes. Is that right? Will my plan to put them behind the cab with shorter tail pipes that exit under the bumper cause me more noise in the cab? Thanks.

For a given muffler, the longer the tailpipe the quieter the exhaust tone.

I am running long tube headers, 4" diameter glass packs: 2-1/2" in & out x 23" case length x 28" O.A.L., no "x" or "h" pipe and 2-1/2" dia, tail pipes. Depending on where you locate the mufflers you could install longer ones and you could install an "x" or "h" pipe. All of these changes will affect the exhaust note and volume.

I bought the mufflers from Jeg's, their P/N 289-24214: http://www.jegs.com/webapp/wcs/stor...e=90&Ne=1+2+3+13+1147708&searchTerm=289-24214

 

[Ratnest]

Looked at the muffler...it might work for me. I just layed under Ratnest and studied it for a while. I'm using GM ram-horn headers that center dump and angle back. I could route the exhaust pipes down, under the cab, and back with long tail pipes outside the frame rail. I'll run this by the exhaust dude (as well as a picture of your setup) and see what he thinks. Thanks again.

 

[Ratnest]

Took Ratnest to the muffler shop this morning. I used Lakeroadster's layout with a couple minor modifications. Here is one "before" and three "after" shots. The glasspacks are 24" with 2 1/4" pipes and should sound fine. Special thanks to Lakeroadster.

 

[Lakeroadster]

Awesome Jim, looks like a top notch job, glad it worked out for ya! Be sure to let us know if you like the exhaust sound.

 

[Ratnest]

Awesome Jim, looks like a top notch job, glad it worked out for ya! Be sure to let us know if you like the exhaust sound.

I'll crank the 66 in a couple weeks or so and will let you know how it sounds.