Blown 460 Stroker (Part 1)

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By Tim Meyer

This engine project will be a 514 stroker topped off with a Dyers 8-71 blower. We will be building this completely and running it on our dyno. Due date is mid-March where it will find its home in a jet boat

The first steps we take with any engine it stripping the block bare.  We then bake the block and caps in an oven at 700 degrees for 2-1/2 hours.  This process makes grease and paint turn to dust.  The block is then blasted with steel shot. This cleans the block and gives a nice cast look.  The baking and blasting helps a little in stress relieving also. After the block has been cleaned it is magnetically checked for cracks.

Pictured are the splayed caps that will be used in this project.  They are a flat bottom cap and require machining of the block to fit.  The next picture shows the machining process used to machine the block for the flat bottom cap.  We are install the 4-bolt caps on the center 3 only.  Once the block has been machined, the main studs are installed and the caps are prefitted.  At this point the block is then drilled and tap for the splayed bolts.  We align bore the main caps after all the studs and bolts are torqued in place.  We leave about .003"-.005" material for the final align hone.  Picture shows the process at this point.  As you can see the caps are much  larger, extending out to the oil pan rails.  The splayed bolts have a lot of material to be threaded into at this area.  The next step is to resurface the block.  We measure the block to confirm our starting point.  We will be shooting for a 10.300" deck eight. This block required .017"-.020" of machining.  The picture shows the difference in the end to end height.  Most block are off bank-to-bank and also end-to-end.

 Part two of this article will cover in-depth details of this article. You can view TMeyer Inc’s web site here.

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