[DeTomaso] Torque plates

[JDeRyke at aol.com]

In a message dated 11/8/07 9:17:11 AM, pantera at kommevalla.se writes:

> I'm going to make a pair of torque plates for using when honing 
> the cylinder bores. Anyone that have the correct measurements of the bolt patterns and 
> the cylinder bores?
> 
Some shops simply use a set of head gaskets for their pattern on a slab of 
steel plate. Note there are a couple of things to consider. First, we should use 
use ALUMINUM torque plates when working with alloy cylinder heads, as the 
stresses put into blocks are different than with iron heads. And if you're going 
to use studs in place of bolts, that also changes things.. Second, the 
originator of the idea- Smokey Yuinick- took iron Chevy cylinder heads and bored the 
cylinder holes clear through the combustion chambers to make the first torque 
plates. If you have trashed stock heads (2V or 4V), this could be used and 
would be cheaper, lighter and easier to move around the shop. Finally, Smokey 
also found that it was necessary to torque the main caps on, and with Chevy 
blocks, the oil pump attaching bolts, all of which twisted the bores measurably. 
In the POCA News of August '98, I wrote an article in which the actual bore 
readings with & without a torque plate were listed for one member's engine as 
they rebuilt it. Due to core-shifts in a 351-C, there are some very odd twists 
that can occur!   Good luck- J DeRyke


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