Toning down 4" exhaust

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03-10-2013, 07:11 AM

#51

kbracing96

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Quote:

Originally Posted by Jetn3

Hey KB, have you ever tried a helmholtz chamber/resonator on a straight pipe? In theory it would be like using a corsa muffler, right?

I want to run a straight pipe out back to hear turbine whistle but also want to quiet it down with the helmholtz chamber/resonator. Most mufflers kill turbine whistle.

I have not. The 3 trucks I've put them on (2 gas, 1 diesel) all had strait through mufflers.

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03-10-2013, 04:53 PM

#52

1FastBrick

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Quote:

Originally Posted by GMCtrk

For what it's worth, my turbo whistles big time thru the above muffler (straight thru) and the hellholes chamber

You can always add a whistle if you want to hear it whistle...

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03-10-2013, 06:57 PM

#53

1slow01Z71

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I forgot you had a lift Kyle, guess I know where Im hauling my truck if I decide to do a dmax swap

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03-10-2013, 07:49 PM

#54

BlackGMC

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Ahhhhh the foreskin muffler mod. Glad it is working for you

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03-10-2013, 08:49 PM

#55

GMCtrk

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Quote:

Originally Posted by Jetn3

I would LOVE to hear a sound clip of your exhaust. Is it that much better with the helmholtz chamber? Does that helmholtz quiet it down at idle too? That's kind of weird, my 3.5 magnaflow 12909 muffler killed my turbine whistle. But then again it wasn't the diesel style muffler.

The diesel muffler is straight through and wont kill any turbo whistle whatsoever. Borg Warner's are known to be loud though.

I'm not sure if the helmoltz did anything at idle, but my exhaust is significantly quieter while cruising on the highway. I'd say it's worthwhile.