KB pistons mopar 383 ci
#4
I have ran them, Good piston's watch RPM's though, crack skirts :!: :!: Don't know how a piston could put coolant in the cylinder :? :? But i guess anything can happen :!: :!:
''JUST MY TWO CENT'S WORTH''
''JUST MY TWO CENT'S WORTH''
#5
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
I think what he meant was that he blew a head gasket and it took out the piston in short order.
Which, if it hydro locked, I think I'd rather have it eat a piston than bend a rod. But that's just me.
Which, if it hydro locked, I think I'd rather have it eat a piston than bend a rod. But that's just me.
#8
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
One thing that no one mentioned is that with hyperutectic pistons you must have .030 ring end gap on the top ring, that is recommended by KB and other manufactures, if you donot and run in the 7,000 rpm range you will pull the top off the pistons. I've seen this on 3 different occasions.
Zip.
Zip.
#9
Junior Member
APPRENTICE
Join Date: Aug 2003
Posts: 15
kb pistons
just make sure you have 6.5 times the bore as your top ring gap And the skirt to cylnder wall clearance must be titer than normal cast or forged pistons to prevent rocking. All the heat is kept on the top of the piston. They will work to 7200 no problem but must be set up properly. cyclnder must be honed to the piston clearnce recommeded by kb and ring gap filled to there spec.or ring end gaps will but an pop the top ring land