350 Pistons in a 3.8 question.

[GrampaMike]

If you use 350 pistons in a 3.8 would the Compression ratio be higher as the CR rating for the 350 pistons is based on 59 cc heads while the 3.8 heads come in at 48 cc's? If my math serves me correctly, that would mean a 350 8.5 piston would produce appx. 10-1 CR with the smaller heads.
What other, if any, mods are necessary to get the 350 pistons to work in the 3.8?
TIA

 

[The Radius Kid]

Am I reading this right?
350= 4.000" bore.
3.8=3.800" bore.
Maybe you're thinking of putting them in a 4.1?

 

[GrampaMike]

Originally posted by The Radius Kid
Am I reading this right?
350= 4.000" bore.
3.8=3.800" bore.
Maybe you're thinking of putting them in a 4.1?

The Buick 350 is a square motor and has a 3.8 bore. It has the same bore aND STROKE AS THE 3.8, MINUS 2 Cylinders.

 

[The Radius Kid]

I'm showing in the Chilton's that the 350 Buick uses 3.800 bore x 3.850 stroke.
Maybe their version of a 307 is what you want?
Olds made a version of a 307 that was 3.800" bore x 3.385" stroke[close to the Buick V-6 dimensions].

 

[GrampaMike]

Originally posted by The Radius Kid
I'm showing in the Chilton's that the 350 Buick uses 3.800 bore x 3.850 stroke.
Maybe their version of a 307 is what you want?
Olds made a version of a 307 that was 3.800" bore x 3.385" stroke[close to the Buick V-6 dimensions].

I based my question on excerpts from the Ruggles and Banahl books which state that the 350 pistons can be used in the 3.8 I wish I could get my hands on bothbooks, but i understand the Ruggles one is quite difficult to come by.

 

[The Radius Kid]

I've got "Jim Ruggles Buick-Stage One V6 Performance Guide"?
I'm looking at page 21,picture 36 and I do see what he says.
The C/R does look like it would be higher with a piston with that dish,all else being equal.
Again I would ask about the relative pin heights due to the different strokes.
That would seem to dictate a different length rod,unless there's a difference in deck heights between the two engines that allows this?
I would guess there is.

 

[jastrckl]

What's wrong with our pistons for you to need to bother? Pistons and rods are probably the last things I'd bother with but what do I know.