Classic Chambered Exhaust

[Dwight]

old thread but I'll update my post from 08.

Lainhart stops the shows when he drives up. Sounds just like a Cobra should.
That 487 thumps. The ground shakes. I love it. Everybody loves it.

Mine, quiet at cruise speed but mak'in more ponies.
My 354 is putting 402 to the rear wheel. I belive the Classic pipe help to make that kind of horsepower.

I install a pair of Classic's on Hodge's Cobra last fall. He has a KC 408 stroker, 525 hp.

Quiet at low rpms but when you push the go pedal, your gone and they hear you. Quiet enough at cruise speed that you can easily talk. Best of everything.

I think when you go with a longer side pipe, it's quieter. When you go with the larger inside diameter you gain hp and it is louder.
I recommend the longest pipe you can put on it with the 3" I.D.

Dwight

[Rare Iron]

Originally Posted by RET_COP

Ron It doesn't make sense. Louvers facing toward the engine "shear" off exhaust and direct it into the outer chamber vs. the reverse direction and a smooth movement of gasses over the louver. Just the word Shear makes me cringe. I'll take the smooth way over the "shear" way any day. It's like putting a vane on the intake valve guide in the runner. It goes in the direction of smooth flow. I can't imagine it any other way

Lou, it does not make a big difference turning the louvers one way vs. the other in flow. Going OVER the louvers (with the grain) is about 4 dBA's louder. I recommend going against the grain & INTO the louvers. None of the Cobra guys have used the 3.5" OD chambered Powersticks with the crimps in the outer body! They look different (they look very "industrial") & they sound MEAN! Much more mean than with the smooth 4" body. The crimps in the outer body create sound wave anomalies that really TUNE the exhaust note.