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Pipe Diameters largely effect the exhaust blow down event when the valve opens and the high pressure gases rush out of the cylinder. The pipe lengths primarily effect the RPM range of the power band. The steps primary effect is on the wave scavenging effect of the gases after blow down ends.
So...
I plug the stock LS3 specs into my engine simulation software and get this:
Primaries:
First Step off the head - 1.625" dia. by 11" long
Second Step - 1.75" dia. by 8" long
Third Step - 2" dia. by 8" long
Collector:
2.625" choke point tapering out to 3.5" over 18" in length
Simulator says this would make 410 rwhp.
Anyone wanna build these and dyno them to check my math? LOL!!!
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#5 - 2010 2SS/RS MN6 ABM #142-Silver Rallys-GFX / Med Titanium
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My previous Camaros:
#4 - 1994 Z/28 6M Black over Arctic White / Graphite-Red Inserts - traded
#3 - 1981 Z/28 Bright Blue Metallic / Black - sold
#2 - 1970.5 RS Mulsanne Blue / Blue - endo crashed it and parted it out
#1 - 1967 RS Butternut Yellow w/ Black Bumblebee Stripe-RPO D91 / Parchment-Black - sold
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