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Re: What's a Torque Plate?

To: "Mark J. Bradakis" <mjb@autox.team.net>, fot@autox.team.net
Subject: Re: What's a Torque Plate?
From: elliottd <elliott@videotron.ca>
Date: Tue, 24 Feb 2004 20:01:40 -0500
Like they used to say on Rowan and Martin, "Veerrrry interesting !"  Besides
the holes for the studs to torque the "torque plate" down, are there any
other holes in the plate to facilitate the honing operation ?  Or is this
done fron the sump side ?

Don Elliott, 1958 TR3A

----- Original Message ----- 
From: "Mark J. Bradakis" <mjb@autox.team.net>
To: <fot@autox.team.net>
Sent: Tuesday, February 24, 2004 6:14 PM
Subject: Re: What's a Torque Plate?


> > Can someone explain to me the purpose of a torque plate?
>
> A torque plate is a big chunk of metal that approximates a cylinder
> head.  basically, when a head is torqued down on a block the stresses
> are such that the bores are a slightly different shape comparedto the
> shape when they block is not bolted to a head.  A torque plate is used
> so that the block is stressed similar to having the head bolted on, so
> boring results in a more accurately round cylinder with the head in
> place, which is the condition where you want it to be round.  Well,
> unless you have elliptical pistons.
>
> In short
>
> No torque plate:    bore is round with no head, not round with head.
> With torque plate:  bore is round with head, not round with no head.
>
> mjb.

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