To the OP
IMHO and it's just mine, now that we have some clear concise info and background we can offer up suggestions and advice.
Clearly anyone reading this thread understands how the nature of INTERNETADVICE works...someone asks a ? and if there isn't enough data we start WAG right off the hop!
So when we get info, those WAG usually are well....slightly off for the most part.
Lets look at this realistically, shall we.
It is said to be rain damage with a bore and hone to 0.030" on a 6.9" block.
How deep is the pit clearly you can "pick" it with a pick but realistically how deep is it. In you best WAG what is depth of that pit?
From what I can see, I'd say upwards of 0.010-0.020 deep but small in size.
Is this a RACE engine making max power for 500 miles? Nope it's a slow methodical engine that makes good power and is reliable.
Our engine speeds are not very high, and the piston speed as it travels in the bore at run speed isn't all that fast but quick enough to pass over that mark quickly enough to not warrant a large concern. Once the first ring passes there is a micro second before the 2nd and third rings pass.
Bottom line unless you intend to make BIG boost, or run this engine WOT it's likely NOT going to be a significant issue.
Best case, Sleeve that hole....
Or
Run it!
Choice is yours.
JM2CW
Al
IMHO and it's just mine, now that we have some clear concise info and background we can offer up suggestions and advice.
Clearly anyone reading this thread understands how the nature of INTERNETADVICE works...someone asks a ? and if there isn't enough data we start WAG right off the hop!
So when we get info, those WAG usually are well....slightly off for the most part.
Lets look at this realistically, shall we.
It is said to be rain damage with a bore and hone to 0.030" on a 6.9" block.
How deep is the pit clearly you can "pick" it with a pick but realistically how deep is it. In you best WAG what is depth of that pit?
From what I can see, I'd say upwards of 0.010-0.020 deep but small in size.
Is this a RACE engine making max power for 500 miles? Nope it's a slow methodical engine that makes good power and is reliable.
Our engine speeds are not very high, and the piston speed as it travels in the bore at run speed isn't all that fast but quick enough to pass over that mark quickly enough to not warrant a large concern. Once the first ring passes there is a micro second before the 2nd and third rings pass.
Bottom line unless you intend to make BIG boost, or run this engine WOT it's likely NOT going to be a significant issue.
Best case, Sleeve that hole....
Or
Run it!
Choice is yours.
JM2CW
Al