Boring/Honing cylinder block

[racemo]

Gentlemen,

I'm about to take my T block 0.020" oversize. In my work we bore engines using a torque plate to represent head installation stresses on the casting. Is that commonly done with the T block?

I'm not looking forward to making a plate for this 4 banger.

Your thoughts please.. Thanks...

 

[Kohnke Rebabbitting]

Gentlemen,

I'm about to take my T block 0.020" oversize. In my work we bore engines using a torque plate to represent head installation stresses on the casting. Is that commonly done with the T block?

I'm not looking forward to making a plate for this 4 banger.

Your thoughts please.. Thanks...

No, not for a Model T, A, or B. Herm.

 

[FRANK PKNY]

My friend bores racing engines with a special high speed hone. It's much more accurate, I am told. He keeps on miking the bore as he goes . They come out nearly perfect every time,much better than boring. It leaves a good surface to seat the rings.

 

[van Dyck]

Torque plates make a significant difference in diminishing upper bore distortion (cylinder head bolts torqued to specifications) where the threaded holes are in close proximity to the cylinder bores, such as found on the small block Chev engine. On a low RPM model T engine, the difference in ring sealing would be negligible.

 

[J and M Machine]

As everyone is in agreement that the torque plates are reserved for high horsepower engines.
Here is an example of the 427 engine with the torque plate.

However Racemo; Since you mention that you bore blocks.
It is important for the cylinder finish and to check the size of the pistons when final honing the block. You also need to be aware of the piston to wall clearance depending on which brand of pistons you have.

We use the 518 stones on the Sunnen cv616 hone and get the best results.
http://www.jandm-machine.com/cylinderHoning.html