Another Exhaust Thread :)

[vex]

Originally Posted by jtbshaw

T, the RB mufflers are the best for the rotary IMO. I have been using them for years with fair success in accomplishing what you are trying to do......quiet without losing too much performance. I have had to modify a few RB pre-silencers to fit in limited areas and was able to see the internals, which is as Ted mentions...perforated and offset with a bunch of curly stainless noise suppression material.

Is this their normal/self branded mufflers or their universal mufflers they offer?

You may want to also consider a heavier wall thickness if you purchase tubing...this takes out a good bit of the "metallic" sound in the rotary exhaust.

On a different note, I will shoot you a PM soon about seeing if you can help me with a intake plenum design for a sidedraft Weber (DCOE).

Todd B.
(formerly of No Limit Industires in Alabama)

Sounds like a plan.

[jtbshaw]

Originally Posted by vex

Is this their normal/self branded mufflers or their universal mufflers they offer?.....

Sounds like a plan.

Their normal mufflers/pre-silencers that are included with their systems. I have never used one of their universal mufflers.

I am trying something a little different on the current system. I will be using a Vibrant stainless pre silencer to see if it holds up like the RB units. It costs about $100 less than the RB and stated that it was for higher temps than standard mufflers. I have a feeling that within the first few thousand miles, the sound deadening material (even though it is stainless similar to the RB) will be burned out and I will have a hollow resonator.

[TitaniumTT]

Originally Posted by RETed

This is exactly what we're going to do with our 20B project...

Magnaflow center 4" in, dual 3" out
...into...
twin 3" in / 3" out offset mufflers in the back

It should to pretty good noise suppression.


-Ted

Nice, that's my exact setup with a different sizes

Originally Posted by jtbshaw

Their normal mufflers/pre-silencers that are included with their systems. I have never used one of their universal mufflers.

I am trying something a little different on the current system. I will be using a Vibrant stainless pre silencer to see if it holds up like the RB units. It costs about $100 less than the RB and stated that it was for higher temps than standard mufflers. I have a feeling that within the first few thousand miles, the sound deadening material (even though it is stainless similar to the RB) will be burned out and I will have a hollow resonator.

I've used the vibrant tubing in my exhausts. Holds up quite well. Can't speak about their muffles though.