does anyone make high compression pistons for a 170

Pressure pulses out of the exhaust are what gets the turbo spinning at lower flows and improves the way in which it comes on; hence, short duration cams, etc. But it there has been so much change and progress in the last 15 year or so in impeller design and tricks that just getting the right turbo can make up for all of that. I went from the standard 14G to 16G to 16G Super on my 2.6L Mitsu, and the throttle response of the 16G Super was an amazing improvement; the blade design and trimming was quite different for the Super version. I would be curious to know what /6 turbos are being used...... I may have to peruse the slantsix.org forum on that. The 16G variants would work fine on the 170, at least on the flow and boost levels; you would have plenty.