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LinkBack | Thread Tools | Display Modes |
October 21st, 2006, 03:31 PM
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stage I & II differences
What are some of the differences besides the 6 bolts for the heads? any difference in the strengths of the different blocks?
__________________
87 Stage2 in the works!     
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October 21st, 2006, 06:35 PM
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The Stage 1 and Stage 2 (offcenter) use the exact same raw castings. The Stage 1 was machined just like a production block and had cast iron 2 bolt main caps. The stage 2's were machined with the oil galleries just outboard of the lifters so the lifter could be left dry.
The lower half of the Stage 2 block was machined for 4 bolt center caps, and the boss at #1 main was machined to accept the oil pump pickup. There was never an On-center version of a stage 1 block to the best of my knowledge. A Stage 1 block is a very strong piece. Much better than any 109 block. If you were to add 4 bolt center caps and bush the lifter galleries, the stage 1 block would become a stage 2 block (with a couple of oiling differences)
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October 28th, 2006, 10:04 AM
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Stage I to Stage II Block
And drill the top of the block for the 6 bolt heads.
__________________
Jon T. Evans
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