Mayf,
I think that if the piston and rod weights are the same throughout the
engine, balance would be good and performance might change about the amount
that a cylinder a couple of percent low on compression might cause. And then
one might put a slightly higher compression piston in the smaller bore and
have no performance degradation at all.
Skip
----- Original Message -----
From: "Larry Mayfield" <drmayf@mayfco.com>
To: <land-speed@autox.team.net>
Sent: Monday, August 08, 2011 18:04
Subject: [Land-speed] Sleeving a motor.. for the stay at home racer
motorheads
> Any number of times people have told me to sleeve my motor down to a size
> that would permit it to be within the D class displacement constraints.
> My current motor is a ford 5.0 with a standard 0.030 over bore. Seems
> like that would be an acceptable size, but just isn't so! That bore puts
> the motor at 3067.133 cubic inches displacement. Just a measly 0.134 cubic
> inches out of class. Almost as if i was supposed to be that way, lol..
> but who would do such a thing...
> In any case I sat here and wondered about sleeving two cylinders, one on
> each bank. That made me think I don't know squat about sleeving and the
> effects. So, would it be better to do one on each side and on teh same
> crank throw or on different crank throws still on opposite sides. One in
> front one in back? In the middle of the crank? How would these positions
> affect crank harmonics? What about the balance aspect of it. Seems that
> if on a different throw then balance would be unsymetrical.
>
> No, not planning on doing this but it is a curiousity to me, something I
> would like to hear thoughts about. Or is it, in reality, picking fly poop
> out of the pepper and makes no difference at all.
>
> On a separate note, I need some 4.03 diameter ford 289 pistons. Forged...
> gota get a motor together for the orange car.
>
> mayf
>
>
> --
> ______________________________
> drmayf
> Worlds Fastest Sunbeam, period.
> 204.913 mph flying mile
> 210.779 mph exit speed
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