Forged Piston to bore clearance?
You might want to have the owner of the machine shopp look at this thread. Might help if they are stand up kind of people.
This is why if i need machine work done I ask LOTS of questions about how back logged the shop is on work. If there isn't a two week wait I move on, good machine shops are always busy.
Whoever built that motor knew what they were doing, and they knew what catastrophic failure it would lead to. That's got to be a crime of some sort.
Callies stroker crank
Callies ls1 rods
Mahle -4cc forged pistons
Moly plasma rings
Clevite h chamferred bearings
Balancing
Torque plate hone
Assembly
This may seem unrelated, but how far do the pistons stick out of the bore?
The Best V8 Stories One Small Block at Time
Some more info on the parts-Callies compstar 4.0 stroke crank, Callies compstar h beam 6.125 rods, and the mahle pistons and rings.
The total was around $3200 for parts, labor, and machine work. Thanks for your help John.
Its a regular build, it just seems like they did not use the correct piston to bore clearance or the pistons themselves may have problems. If you send them off to mahle, then that will tell you right away.
Let us know what you find out.
I then built this car with the fresh 383 from Machine Tech.
https://ls1tech.com/forums/forced-in...me-tx2k12.html
It made 936rwhp on 19psi with a T4 PT88
Won TX2K12 street car class with a 9.20@155mph
Made #1 spot on the NM KOTS List.
Blew up a Comp Turbo....twice. lol
And did continual work on the street for 3 SEASONS STRAIGHT ALL ON THE SAME SHORTBLOCK NEVER CRACKED OPEN ONCE!!!!
Moral of the story....Trust no one to do something critical that you can do yourself. And if you can't do it yourself, TRUST BUT VERIFY THEIR WORK!!!!
Thank you and goodnight lol


