Randy Nielsen

iTrader: (4)

I will take some pics of the piston-rod assemblies tomorrow.

F-2 Speedy

iTrader: (6)

I agree with Mike, looks like heat checking to me, a good std std GM fordged crank may be in order, and Randy we knew u pulled the bolt first.

mike tkach

iTrader: (3)

just fyi,gm bought the gen 5&6 cranks from scat.

ezstriper

couple of things...need to have a machine shop ck the crank for size/round and the rods as well, I have run into scat and other cranks that say factory balanced be totally crap and have a tuff time getting them to balance at all, can't imagine what they would be like run as is...backfiring had nothing to do with the bearing/vibration..good luck Rob

F-2 Speedy

iTrader: (6)

So a Kellog stamped crank is from Scat ?

sutphen 30

when you see that shade of gray,,they're all from china.
scat cranks are usually alright,a touch on the high side but have been way better than eagle.

F-2 Speedy

iTrader: (6)

Yes, Im aware of that, but it didnt answer my question

Randy Nielsen

iTrader: (4)

[ATTACH=CONFIG]527218[/ATTACH][ATTACH=CONFIG]527215[/ATTACH]

sutphen 30

[QUOTE=Randy Nielsen;4160844 The crank was replaced & short block built 5 yrs ago then stored until last yr then everything disassembled cleaned up & reassembled, dyno'd now this.[/QUOTE]

I must have missed this.from the markings on the bearings,this crank/bearing clearance is a miss.
do you remember measuring this crank and adjusting bearing clearance.

sutphen 30

yeah,I don't know that,,maybe RMbuilder can answer that