[jessrayo]

Originally Posted by Turbo_RORO

I think the next question we need to ask now is how much power can the block handle? Without 6 bolt heads, or sleeves etc. Has anyone had a block failure due to power production?

I had LME build me a complete forged motor for my 2016 on twin turbos after the stock piston rings broke. I spent a lot of time talking to Bryan about what limitations they have found with these engines. This is all after putting 5 different engines in my 2013 ZL1, 3 failures over 1000 whp....

I was assured that the design of the new LT engine block has eliminated the problems I had on my LS engines with blowing head gaskets and lifting heads. He said they have several motors out running over 1500 whp without a 6 bolt head or any O-rings or other stuff we had to do on the old LS. His comments reflect what others have said earlier in this post in that they are finding main bearing failures at super high power levels. My current engine has a LT4 block specifically because that block has larger main bearing supports. The other things that can be done on any LT to improve bearing life are better main bolts and upgrading the crankshaft. Many times crankshaft flex is what ultimately destroys the bearings. They say the stock crank is good for 1000whp, over that.... I upgraded mine.

Running a supercharger off the front of the engine puts a lot more load on crankshaft. It's just the way it works. It is ultimately why I gave up on running compound boost, if you put 5 pounds of turbo boosted air pressure into the supercharger and then compress that to 18 or 20 pounds it puts a huge load on that supercharger....heat, belt slip, bearing load......just doesn't work well.

But heads should be fine on the LT motors from what I've been told.