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Jason wrote: >>So my question is how did VW lower the compression on the 1500S. Were they domed-dished, flat or flat-dished 83.5mm pistions?<< Dave Hall tells me that he has a parts book that indicates flat top pistons for the M240 lower compression 1500S as opposed to domed pistons for the standard 1500S or recessed pistons for the M240 low compression 1500N (thanks Dave). The engine numbers section on Dave's site says that an engine number including the letter N indicates a low compression 1500S (M240), so I'm sure that's the engine I have. I'm still a little confused, though, because my parts book definitely calls this M249 and the metal tag bolted to my case reads M-249 90-oktan. Scott 62 343, 65 361 ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org