installed the welded diff and tested it out!

swapped out the rears today, welded junkyard open diff, vs stock gov lock

it was pretty bad, i jacked up the rear and put it in neutral, i could spin one wheel and the other would not spin at all, or if it would spin i could offer just a little resistance and the clutch would spin, they were both totally worn out from the mileage and i bet the hp i was throwing at it was not helping at all

fired it up, and went to go fill the tank and beat it up!

she hit 212k on the way home and it feels like i picked up 200hp now that the power is getting to the equally all the time.

broke the fresh 5.3 already

ok, so i took it right to the dyno friday, black friday, and hit it with 20lbs and she made 40rwhp extra, 640rwhp...


so i proceeded to top out the boost controller again around 26psi and it came up, and stumbled and laid over. i let out and knew i broke a piston or two again.
rods are strait. 
piston 3 had the lower ringland broken in half...
im at a loss here haha what do you guys think.


3 and 7 are broken the others are fine. used headgasket is fine also. pistons dont even have any marks in them showing detonation or anything.