More Triad, advice sought Options

[John Kelly]

The used Triad I got recently had something banging around inside of it so I cut a window in it to find out what was in there. There were two pieces of tubing with small holes in them welded together as some kind of baffle. Nothing to direct flow through the bottom leg of the "T"... the 1-2 side goes directly at the 3-4 side and they fight for access to the next leg of their journey. I'm happy to hear that folks like these mufflers, and will probably use this one since the engine was tuned using it, but I would like some advice on making a baffle, or "Y", or combination of the two to fit in window before I weld it back up. Pictures attached.

Thanks, John www.ghiaspecialties.com

[JWest]

They don't fight, they share. Remember that the exhaust pulses occur at different times, so they take turns flowing though the pipe.

That's why one 700 CFM Holley 4 barrel carb and four 300 CFM Weber carbs are both correctly sized for an American V8 - every cylinder "sees" the whole 4 barrel while each cylinder only gets one of the Weber's barrels.

If you were to divide the pipe and the chamber before it, you would increase velocity, but lose some scavenging. So would it be an improvement? Can't tell without changing it and retuning to match.

While the flow transition could be improved at that point, it is probably not worth it as it is a large pipe and the flow has slowed and changed directions in that first chamber already.

The above points are simplified and we really don't know what's going on until flowing it, but the point is that is is not obvious what change to make and it is probably best to leave it alone.