Quote:
Originally Posted by Tony H
Checked cyl wall thickness at 90deg intervals in 3 places. There was a great variation of thickness-from over .300" to 1 spot at .185". I will probably bore a nominal amount like .25mm or .010" and keep as much wall as I can.
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Quote:
Originally Posted by Tony H
In case anyone is following this-another possible issue before I order pistons is the distance of the ring package from the piston crown due to possible interference from notches in the cylinder wall to clear the intake valve since i'm using 5.6 heads. With the 4.5 bore the 5.6 intake valve just touches the cylinder wall. I don't think the minor bore increase will provide the needed .060" clearance, so notches are imminent. I have calculated the 5.6 bore of 96.5 provides about .080" more of clearance on each side.
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Tony,
Even if you were to increase the bore to 93.5mm the wall thickness would still be .125+". Valve clearance would be >.030", which seems quite sufficient from a clearance standpoint, if not from a flow standpoint.