Ya you want low compression and thick cylinder walls. You don't want to run a 13 to 1 compression if your are boosting/super charging or bore it out a hole lot (at least on street gas). I have a few friends running turbos with .020 over sized pistons no problems yet. Thy are running block guards too. I have done some reading your can go further over sized but that would be risky if your are boosting/super charging more of a naturally aspirated power adder.

Jackson? Thy seam ok I have never worked on one. The only problem I see is you can not cool your intake temp comparable to a centrifugal super charger. Lets say you use a water to air inter cooler and a Jackson supercharger, you would cool your charge a little then compress it and re heat it. If you use a centrifugal super charger you compress your air heat it then cool it in the inter cooler.

You see what I'm saying an inter cooler cools hotter air better then colder air because the water you use is around ambient temperature If the air you are cooling is at ambient temperature and your water is at ambient temperature you will not get much of a cooling affect but if your air is at 180 degrees and your water is at 80 you get more of a cooling affect. So basically the air entering your engine with a centrifugal super charger should be cooler in theory.

This all is shit talking if you are using ice water but do you want to fill your car with ice water every day? I have also done some reading that centrifugal super chargers run a bit cooler and a bit more efficient then a screw/roots/lysholm whatever the Jackson is. The only draw back is thy have to run very fast and are not a liner compressor meaning every revolting dose not equal more boost because thy need a lot of speed to even start boost onset.

I'm sure i have raised some feather of some people hear. So if any one wants to post their ideas on superchargers go ahead no affiance taken. I may be way wrong all of my stamens are based of what I have read I do not have a lot of hands on with super chargers.

Whatinthe if you want to learn more go to a local book store and take a peak in the auto section theirs is a lot of good books out their on turbos, super chargers, tuning you name it. In the end I prefer a turbo but this is another place and another time the debate on what one is better will never end.