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A little bored given the crappy weather, and mindful of the mileage my 205's original engine is racking up, I was thinking of building up a higher compression 8 valve lump for my 205, 1.9 with 1.6 pistons, and am wondering what the limitations of the standard top end is, and would standard bottom end parts work as a budget build without grenading given the 8 valve tends to produce its power at lower rpm? the questions I have are as follows: at what point does the head need work, would I benefit significantly from doing so at a fairly low level of tune? IIRC I do have a lightly tickled 8 valve head in the shed already, the exhaust ports have been smoothed up a bit I am thinking as with most pug engines and going from what I have seen of Sandy's engine builds is that the valves are plenty big enough (though I'm off to read this topic again shortly... http://forum.205gtidrivers.com/index.php?showtopic=31290&st=0 ) a quick working from memory of dish and chamber volumes indicate that I'll be around 10.8-1 with an unskimmed head, no doubt the head I have has been skimmed in the past. what is the max lift for std valve gear? I take it that RPM is more a bottom end concern given the tappets are solid as standard. for the bottom end, I am thinking as mentioned of some XU5JA pistons as they have a smaller dish and bump the compression, some standard 1.9 rods checked for weight discrepancies. I do have an XUD9TE crank to hand which is reputed to be forged steel. I have an XU7 block to hand, and an XU7 oil pump, as well as XU9j4 10J4RS and XU10J4 oil pumps. Camshafts, not sure what I could use, may depend on limitations of standard valve train, IIRC I do still have a PTS max Torque cam if it has not rusted away in the garage