Originally posted by Just_Blue:
You guys make it seem like the VG engine needs backpressure. I don't know if I agree with you on that, but I plan on making my exhaust piping 2.5" from the headers to mufflers to a 3" (or 4") single outlet (cats removed). With an intake and pulley, I'm guessing that I'll hopefully get 300 hp at the crank.
What I'm more curious to know is what some of you predict will happen if I go with this exhaust setup.
I think that's too much exhaust. Keep in mind an LS1 powered car comes from the factory with 2.75" exhaust which can easily support 400hp. V8 Mustangs come from the factory with 2.25" I believe. My 475 crank hp car has 3" all the way back.
Yeah, you might have good peak numbers with the exhaust you're planning on running, but you'll notice a definite lag driving around town.
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