One was adams truck, other was buddies back east. It was a lbz that got built. i dont know who the pistons were but they were 18.5:1. i might have the pics of the bowls on my phone somewhere. he put 80% overs in there and had steve tuning it. we were going back and forth from there as it rattled like hell under certain conditions and steve was asking me if it could be an engine issue. i didnt put that engine together so we asked things like protrusion, p to w clearance, headgasket used, and other parts used. it took a lot of pilot injection work and timing, then sounded like it was pretty good. his thought was throttle should be snappier, better mpg, more power less boost, etc. the typical tune he had was 1400uS so fairly decent. There was some tweaks here and there as time went on but it all kinda fell back to the same things adam saw on fingers pistons. didnt clean up any more haze the 80's might have had, throttle felt the same, still have a little rattle here and there under very specific conditions that were hard to track, and power wise was till on the same track as lower 17:1 or 16.5:1 compression. mpg negligible. he did say it fired off in the cold really easy and might have reved quicker/easier but was hard to say.
i thought about going higher in your truck but just went standard 16.5:1 everyone runs.
fingers has a pretty good write in adams thread about higher compression pistons and why they dont work like guys think. see if i can find it.
