I did the hp upgrade on 032-e2d on my Cessna Cardinal, I used the RAM stc, it does not required the case work and the e2d shipped on the Cardinal already has the Fuel pump. The Cardinal requires an engine and electrical fuel pump. Being a certified Aircraft I had to get the STC for the engine from ram. It came with a just few parts, stanless steel oil line that changes the oil pressure pickup from the rear of the engine to the right front galley of the engine, a new tach, because it has a yellow line from 2650 to 2700 rpm. The Ram is restricted to 5 minutes at full power of 160 hp. Now that would only occur at sea level, because as you climb you start dropping the hp. And to answer the question about the extra 10 hp, It was very noticable in the Cardinal on climb out on takeoff, and that is where you use the full power. I believe that the cost for the stc from RAM was $250.00 paper work and parts. At the time I had the cylinders overhauled, I found that the high compression cylinders cost less then the low compression. So even on a certified aircraft at time of overhaul, it is very little cost for the extra hp. As far as the higher Octaine, I have contempleted the loss of ability to run car gas, something I had never done before the upgrade, because of the inconvience of it in xcountry flying. And now with all the ETOH in fuel i just pump the blue stuff. When it is outlawed and if there is nothing to replace 100ll then there will be a lot of other aircraft sitting on the ground. On your engine if it has the engine fuel pump then the only thing you will need to do is exchange out the piston, rings and I believe the pins are different, which at overhaul you are going to do anyways.
