As far as DBW vs. DBC, its cheapest to stick with whatever your motor came with. Its individual preference in terms of what people like more though.
I'm not familiar with cams as I haven't made the commitment to cam my engine yet and haven't done the research, sorry. If you don't want to do the research to find what cam will be best for you or feel like you aren't smart enough GM does sell "hot cams" which are slightly souped up versions of the stock cams.
Brad, you probably won't see 460 at the tires because that was a dyno on a Corvette that only went through a manual trans and axle gears. You'll have more loss from the slushbox, t-case, deeper gearing, and tires. While generally accepted loss on those sports cars is around 25%, estimated on rock buggies can be upwards of 50%. Billavista posted his chassis dyno of his old engine which was suppossed ot be 250 at the flywheel on Pirate once. Through his buggy to the ground he was dynoing like 120 or something like that.
But Yes, you are getting the point. In that thread I linked he gives the exact specs on the custom grind cam that he used. If you do the exact same setup you should see similar results. If you shave the heads / block you should see a bit more at the flywheel than he had.
Just to iterate a bit more on the shaving issue, the stock LS3 / L92 heads have a lower static compression ratio than the stock 6.0 heads did. To get it back to where it should be you have to shave material off to reduce the compression chamber volume. If you do just the block or just the heads you screw with the alignment of the head bolt threads slightly. It is minimal but theoretically they will not line up properly anymore which may lead to uneven clamping force and / or stripping the threads. Thus, it is best to do both the block and heads an equal amount. That requires removing the engine though which is why that guy with the Corvette didn't do it.
And remember, you can't get the most out of your engine without paying someone to dyno-tune it with a wideband o2.
Finally, yes, this is all just internet / literature research on my part. (Which I do a lot of.) I plan on running my LS2 bone-stock for now and upgrading over time. I have also purchased HPTuners and my own wideband as building these engines is a hobby that I intend to get into long-term. I will tune my stock LS2 until I feel I've got the most out of it and know what I'm doing and then I will upgrade heads, cam, etc. Eventually I intend to buy or build an engine dyno. Basically, when my body is too beat up to keep wheeling I'll build these engines for fun, maybe make some money doing it.
J. J.
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