Didn't GM build an I6 4 valve motor for trucks at about 250 CID?
I know, weird idea....
Bryan
Dave Dahlgren wrote:
>a ford would a lot better choice if you want an E motor and it has to be a
>V-8.
>The lower deck height is more reasonable for the stroke to have to run to
>get down to 260 inches.
>Here is the problem
>with a 4.030 bore block has to be about the most common size ever built for
>a small bore engine you need a stroke of 2.54 or less to be legal engine
>size.
>the shortest Chevy rod that I am aware of is around 5.565 out of a 400
>Chevy. That still gives a rod ratio of 2.19 pretty long by most standards
>typical ratios are around 1.7. now with a standard Chevy block with a 9.025
>deck height the compression height of the piston comes out to be 2.190, or
>in other words heavy and unstable pistons. GM does make an aftermarket low
>deck block but the word rare to describe them is an understatement. next
>thing is the heads and intake manifold. They will have to be purpose built
>for this small an engine with this long a rod ratio.. Even with all that you
>still need to spin it pretty hard to make any power with that small an
>engine and torque with a 2.54 stroke and typical Chevy heads will be low to
>non existent..
>Or you could build a V-6 or get a used Busch GN v-6 that has all the R&D
>work done and makes around 550 hp until you are tired of pouring gas in the
>tank..
>Dave
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