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Message: [QUOTE="Gearhead, post: 8232, member: 503"] Doing this also adds to the negatives of the factory profile though. On a compound truck with drive close to boost, it isn't as big of a factor. The thing is that a 200k motor should have a cam reground anyway to get rid of pitting, so why not replace it with something better. The factory profile with just an LSA change and different centerlines would make more power than stock but on my stage 1 I took it a step further and balanced the airflow better since the intake ports will always flow less than the exhaust ports unless you purposely only port the intake runners. IMO you shouldn't do this because you could take advantage of the better flowing exhaust runners and delay the exhaust opening and convert more energy into driving the crankshaft instead of driving the turbo all other things being equal. Why do you think a 6 liter relies on a VGT turbo to make boost down low? The engineers did exactly what i'm talking about with lengthening the power stroke by holding off the exhaust opening as long as possible for maximum efficiency. [/QUOTE]

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