have you tried Holden 6 cylinder pistons?
simon
-----Original Message-----
From: David Kernberger <dkern@napanet.net>
To: mgv8glen@bellatlantic.net <mgv8glen@bellatlantic.net>
Cc: buick-rover-v8@autox.team.net <buick-rover-v8@autox.team.net>;
mgb-v8@autox.team.net <mgb-v8@autox.team.net>
Date: Saturday, April 24, 1999 1:55 PM
Subject: Re: More questions, would you believe
>4/22/99
>
>Glenn,
>
> Thanks for your candid reply. That's exactly what I asked for so I
>had it coming. The Buick 300 rods are not a good choice apparently. So
>maybe back to the drawing board????.
>
> The other statement you make regarding low compression ratio you do
>not substantiate with numbers. What do you calculate the ratio to be?????
>My estimate was done using Baker's 289 recipe as a starting point. Do you
>lack faith in his numbers? I have Peter Kent's compression ratio spread
>sheet but have not yet had the chance to push these numbers through it. By
>my figures, this combination gives .003" greater piston height at TDC, than
>Baker's 289 recipe, but the smaller displacement reduces the C.R. from his
>10.38 to about 8.89. The .600" shorter stroke (compared to Baker's 289) is
>almost exactly compensated for by the .303" longer rod. So----where did I
>mess up??? I really want to know!!! Precise factual information has been
>very difficult to come by in my experience so far.
>
> It happens there are a number of reasons I am choosing this block,
>crank, head, cam, and carburetion combination which are not really open to
>change, so I need to limit the discussion to these parameters. The only
>unsolved part of the equation is the correct piston and rod combination. A
>maximum CR of about 9.00:1 is what I seek. I have 2 sets of Rover Rods,
>many Olds F-85 rods, and 1 set of small block Chevy rods, but I have not
>found any pistons with the correct compression height and bore size to
>match these other components. Can you supply the correct combination? For
>Rover rods, I think the compression height would need to be about
>1.880",flat top, or equivalent in dome or dish.
>
> Apparently even Chrysler rods of some sort have been used in these
>engines, though I do not yet know which ones. Also I have often wondered
>whether anyone has used any other Buick rods, or any G.M. v6 rods, some of
>which use the same big end bearings as the Rover/Special/F-85 ones. My
>main reason for reboring is that I need new pistons anyhow so I might as
>well pick up the 2 cubic inches that result from the recommended maximum of
>.020" overbore.
>
> So------if you feel like making any more candid replies, they will
>certainly be welcome.
>
> Any feedback from others is also welcome.
>
>Cheers,
>
>David Kernberger
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