6.0 Vortec - So when did these get so cheap?

novaderrik wrote:

Ranger50 wrote:

Carro Atrezzi wrote: If you are going to boost the crap out of it, does the 6.0 buy you anything over a 5.3? I really don't see the extra 700cc making too much difference at the levels the Sloppy Mechanics are running.

Bore size is able to unshroud the valves a bit plus able to go bigger. But when you're cramming in 15+ psi... I don't think it matters.

the good heads also work with the big bore blocks: you can't put the LS7 heads on a 5.3, but you can put them on a 6.0.. i haven't looked up the prices on those heads lately, but when they first came out they were in the $500 range for a pair of them at any GM dealer, plus a couple hundred more for all the rocker arms and gaskets and what not..

CNC ported LS3 heads are in the $600 each range from GMPP. they need a 6.0's bore or larger.

I think the reason the 4.8 takes boost (from a turbo) so well is that the stroke and resulting maximum rod angles being much smaller are very conducive to much higher RPM's. Also the bore size is smaller making the pistons smaller and lighter and again this makes higher RPM's that much easier to obtain. All this is very Turbo friendly.

The larger bore and stroke motors (like the 6.0l) are not as good at surviving at high RPMS but with the added volume they become torque makers and as such I think would respond much better to supercharger applications where you get a much flatter torque and HP curve.

In short the big displacement motors will make a ton of power from 2K to 5.5 or 6K where as the 4.8 will make it starting at say 3.5K or 4K but you can spin it up to 7k or more.

There is no wrong answer here. It really comes down to what you want.