I have been toying around with an idea for a new motor for my Sunbeam.
But it would require a destroked crank to meet the displacement goals. I
have been searching around for such cranks and they are pretty rare.
Some are apparently used in a Nascar class somewhere which has a
displacement limit. I know about off set grinding to either stroke or
destroke abit. But, even with a brand new crank, I would not be able to
get there. So, my question... I know cranks can be welded up and
reground. But how much can that be used? If I wanted to take a crank
down with a stroke difference of say 1/2 inch? That seems like a LOT,
lol, as it would require a 1/4 inch or more of buildup on the inside of
the rod throw. Even if I started with a 289 ford crank it would
still be a lot. And is that even doable with a cast crank? I would
expect it to be ok on a forged steel or billet crank, though.
I'd like some responses from folk who have actually had something like
this done. Suggestions of changing motor blocks etc are not what I am
looking for.
And I am just fiddling around now. The Sunbeam may never run again as a
race car..and that would no doubt please a LOT of people, lol...
mayf
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