Thanks to all for the responses. I think I am going to leave the bores
centered as they are and just bore them out the additional amount to
accomodate the new pistons. I have the wall thickness to safely work
with, so why muck with everything else by adding additional "X" factors.
Thanks again, as your comments were helpful in coming to a decision.
Dave
> -----Original Message-----
> From: sean murray [SMTP:snmurray@iol.ie]
> Sent: Tuesday, June 09, 1998 1:37 PM
> To: Dave Billings
> Cc: chapman-era-owner@autox.team.net
> Subject: Re: Shifting the bores on a Kent Ford block
>
> At 09:58 09/06/98 -0700, you wrote:
> >Ray (and all the listers):
>
> >But here is a question for you. If you think of the any shifting
> along
> >the line of the crank as fore/aft, and the other directions as side
> to
> >side, it would make sense that shifting a bore side to side .015"
> would
> >not affect anything with regard to the crank/rod relationship, since
> any
> >shifting is in the direction of normal movement of the parts anyway,
> >correct?
>
> I understand that the piston wrist pins are slightly offset from the
> crank/piston centre line as a rule, so that the change of side thrust
> does
> not coincide with the change of vertical thrust. That is why the
> pistons
> have a directional arrow on the crown to ensure this is to the correct
> side.
> Offsetting the bores sideways could increase or remove this effect,
> depending on which direction the change was made. I don't have
> figures on
> what is standard, but i think it could be checked out.
>
> hope this helps !
>
> Sean Murray
> Wexford
> Ireland
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