So the issue isn't so much the motor as it is human error then. It seems there are a lot of boost 6.2's on tech. I can see hard to tune ECM causing issues.

 

I think I'm gonna just build a 383 Stroker motor out of a 5.3 and build it for boost and install a D1 or maybe a Turbo don't know yet

 

tray to get a 6.0 youll get the best of two worlds

more displacemnet than the 5.3 and ready big bore , and youll start with a solid Iron block , i just cant trust almnium blocks as DD for anything over 15lbs

thats just me , I might be wrong but thats just me.

i bought an LY6 for the same reason insted of building my alumnium 5.3 to 383 after spining the bearing

also took the 6.0 for the obviously better flowing heads

the LY6 comes at 9.6:1 CR

as for having a good rotating, the stock GM crank holds its on , some went 1200hp on F bodys on the LS1tech and most guys saythe never had a problem staying arround 800hp so all you really need is new rods and pistons with balancing the crank shaft and get some SS valves , i think youll hit 18 PSI no problem

I never built a turbo motor but thats what i have been reading and seeing ppl do

thats what i plan on doing too

 

This is a iron block 5.3