| before the silencer will produce a little bit of scavenging effect, especially with them dumping into a 4" cross section. But I think the biggest advantage with the setup is that the 4" cross section that each runner is dumping into is a significant decrease in flow restriction. The turbochargers are really only feeling an exhaust system of about 3-4 feet in length by doing this. Once the gases enter this 4" silencer they drop in velocity quite a bit, and then at the exit of the silencer, there are now two 3" pipes to carry the gases. The cross section of the exhaust pulse travels as such: ~3.5' @ 9.4 sqin
12" @ 12.6 sqin
~8' @ 18.8 sqin 9-12-18 is the cross section steps. The engine is really only feeling ~80% of the initial 3" single pipe, 15% of the silencer cross section, and then only about 5% of the remaining tube to the muffs. These are just approximations on the numbers but I feel they are pretty close to actual. As for producing exhaust products, that's Greg's department. :) I'm just dropping ideas out there for anyone who thinks it may be something they want. :)
Enthusiasts soon understand each other. --W. Irving.
Are you an enthusiast? If you are out to describe the truth, leave elegance to the
tailor.
Albert Einstein
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