Keith, this is the stuff I really dig, personal accounts of engine
internals, thanks much for sharing that
Are you sure that the other pistons have no sign
of that hairline cracking near the area of where the
pin tower blends in with the underside of the dome??
Also if you look real close in that area, can you see
any signs of a rainbow effect there, presumably from heat
that presumably play apart in the hairline crack formation?
Doing the freshening bit myself right now, its all
very intriguing to me.
Trying to put the pieces of the puzzle together is a blast.
I especially love when folks run something because
of various reasons, and thereby have there own data
that shows something that held together when others would
have said that wont work.
Keith Turk wrote:
> Since I had the Cast Iron D motor outta the car I decided to spin it apart
> this morning and see what I needed for Rings and bearings.... and see if
> anything else had any issues.... Well y'all might recall we lost a couple of
> Valve seats at the World of speed and then stuck these Dart 230's on without
> freshing up the bottome end...( kinda hard to do in a motel parking lot...
> less your Joe Amo ... then anything is fair game to include line honing with
> a broom stick and 600gt sand paper) ( Joe that oughta get your parking lot
> rebuild story rolling )
>
> Anyway the only Piston that had any issues at all was #2 which is the one
> that lost the vavle seats.... I wasn't afraid of the little divets on top of
> the piston they had a right to be there.... but that top ring sticking kinda
> worried me a bit..... On further inspection there is a Hair line crack on
> the underside of the dome right by the top of the pin boss....
>
> Okay now for the test of common sense..... did I buy 10 pistons? like a
> good little boy? ahhhh NOPE.... I was playing a pretty fair member of the
> "we tight club" so now I get to order 4.... seems to be Ross's minimum
> order....
>
> All and All.... pretty fair deal.... spun this motor to 8950 a couple of
> times... and Brad just spun it to 8400 at the last meet.... all with what I
> can only assume was a Crack that resulted from the Valves seats coming out
> Three Races ago.... Hmmm 200mph with a cracked piston... not a bad deal....
> Since it didn't come apart!!!
>
> Lesson Learned..... Lesson Passed along.... ORDER 10 ....
>
> Keith ( bearings looked like BRAND new )
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