Dynatech Muffler Inserts

[Don]

Has anyone had any experience with the products offered by Dynatech to reduce the db level ?

Dynatech
POB 608
975 Hy-Rock Blvd
Boonville TN 47601

800-848-5850

www.dynatechheaders.com

Narration below was taken directly from the Dynatech web site and written by Dynatech.





Racing Mufflers : Insert Mufflers

PRODUCT: 72-32520
Vortex Cone 3in. - Stainless Steel
Sound Insurance!




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100% T-304 Stainless Steel Construction
Compact Size Fits All Racing Applications
Ultra Lightweight-Less Than 1/2 lb. each
Little or No Power Loss
Easy Bolt Installation
Insert Cones on 3", 3 1/2", 4", 4 1/2", 5"
Turn Down with Insert Cone in 3", 3 1/2", 4"
Let’s face it! Open exhaust racing is a thing of the past. Sound requirements, mandatory mufflers, or maximum dB levels are found in all forms of racing today. From Mini-Stocks to Outlaw Sprint Cars, reducing the sound level is becoming the norm. Today’s racers are spending thousands of dollars to go racing. The last thing they want to do is get put on the trailer for too much noise. The Vortex Insert Cone can help keep you on track.

How It Works: The Vortex Insert Cone, installed near the exit of the header collector or muffler outlet, provides a large friction area to reflect and dissipate sound energy, thus reducing the dB level. The open area of the cone is actually greater than the area of the collector or exhaust pipe, thus reducing a backpressure condition. Because no significant backpressure has been introduced, the engine is still able to use the scavenge ability of a good header to creat horsepower and torque. Dyno and track testing show significant noise reduction with little or no power loss.

[Bart Carter]

Originally posted by Don Dyno and track testing show significant noise reduction with little or no power loss.

If they could back up this statement, I would be a buyer.

[Don]

Reply received from Dynatech regarding db reduction and power loss:

Copy of e-mail:

Usually you can expect a 1 to 3 dB reduction in noise using the cone. The power loss is minimal if any. These are results taken from use of cones in many forms of racing. The power loss if any will usually be no more than 1%. Of coarse this will vary from system to system.

Thank You for your interest,
Greg @ Dynatech

[Bart Carter]

A 1 to 3 decible reduction.

Is that worth it?

[STEVE POTTS]

If a noise source is reduced by 10 decibles the human ear will perceived the noise level to be 1/2 as loud.