At 10:21 AM 08/29/01 -0700, Dick J wrote:
>I've been sitting here making good use of my
>lunch hour looking at SBD dimensions and have
>come up with a question. The weakling of all
>SBCs had to be the 262 that was made during the
>mid-seventies. It has a b/s of 3.671 X 3.1.
>Could the 262 block be bored enough and keep the
>3.1 crank be a good candidate to make a "D"
>motor?
>
>Dick J
Dick,
In my opinion, NO it is not a good candidate.
For small engines ("D" motors), the key
seems to be to rev high to make horsepower.
Large bore and short strokes are the wisdom of
the day to rev high.
Assuming you agree with the large bore, short stroke
argument (and I do), then starting with a
327 block (4" bore) and a 283 crank (3" stroke)
gives you 302 cu in. With a .020 or .030 bore to clean up
the block, you are at the top of the "D" class.
No matter what you do with the 262, you still have
the 3.1" crank and my 3.0" crank (or aftermarket 2.9"
crank) will have an inherent advantage every time.
My guess is that while the 262 can be made to work,
"for the same money" the 327/283 combo will run faster
every day. For a SBC "D" motor, the
stroke of 3.1" is too long.
Others, such as Keith will make the point that if you
go to 4.060 bore and 2.9ish stroke you get the best
option (but more money). My point is that you are going
up hill on the stroke length issue.
Just my thoughts
KEN
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