Help - Boring Plate Design

[66200i6]

I have a question that will help me decide how big to make the boreholes in my Boring/Honing Plate. My thought is that the size should be based on the maximum size overbore these blocks can have (.02, .03, .04, .06, ect.).

As an example, with the stock bore of 3.68 a max overbore of .06 would be what? A total of 3.74 dia bore?

Thanks, Ric.

 

[twentyover]

I'd go bigger than that- maybe 1/8 over for a max overbore of .060-you're not sacrificing anything, and it will make it easier for the machinist to clear the boring equipmet.

Didn't a member in Anaheim have a torque plate for a 200/205? He'd probably be the nest perdon to ask about clearance

 

[CZLN6]

Howdy ric:

The head gasket bore on all aftermarket composite gaskets is 3.81". I would go at least that big and possibly a little larger. This will not be an exact replica of a head in place as a head will have wedged chambers. For that extra inth of accuracy, torque the main caps, engine mounts and water pump into place also. Bore the least amount necessary to maintain cylinder wall integrity, rigidity and strength.

You can reuse the head gasket that your used if it is not damaged in the process. Check its compressed thickness and record for figuring an accurate CR.

I'd also ask your machinist what his needs are to get his boring and honing machines safely in place with the torque plate in place.

Let us know how it all works out.

Adios, David