Quiet muffler choices

bbab3 said
I called Walker's technical service line this morning and asked about the flow numbers for the Quiet flow 3 mufflers. He told me that they don't have those numbers listed with the spec's for that line of mufflers. But, that they typically flow 290-320 SCFM.

Good call on making the phone call. That is enough cfm for a good hot rod. (Twin mufflers of course.)

After talking to him more about my concern ....
suggested using their Bullet muffler 24215 as a resonator upstream of a Super Turbo muffler. The Bullet is short glass pack, removes the drone associated to the Turbos.

This is accurate. I have done that myself. The sound does change a tiny bit. The glass pack gives a flat (Bugs Bunny, Elmore) fudd fudd fudd sound. The longer the glass pack, the more quite it will be.

The link above Auto Exhaust Science, discusses the formula of HP X 2.2 = flow. If my motor makes 350hp it needs 770SCFM of flow. So it will need more flow than what the Quiet Flow 3's will give.

A 350 hp engine needs 770 cfm. Check!
Dual Quite Flows will indeed be short of cfm flow. However!
The power will lack once the flow limits of the muffler(s) occurs & will be noticed (if at all) on the top end. The low end to mid rpm power levels will feel good and be good. It depends on where and/or when the engine is moving more air than the mufflers can handle. This is an interesting and variable point I think, depending on the engines build and C.I.D.

Things that make you go;
Hmmmmmm
(Arsenio Hall, LOL!)
:lol: