Alright, I'm going to rant about my pet peeves for a minute:upset:

1) A centrifugal supercharger is a poor choice for a Honda, as it makes top end power only, as you have to spin the snot out of it for it to boost. So it's not conducive to a small displacement engine, as you still have little bottom end and you have to wait for the revs. That's why these are used on a lot of V8's as they already have the low end to spare.

2) A roots/positive displacement is a good match for a small displacement engine as it boosts the low end as well as the high end. Also, instant boost people. In cruising it's still spinning and making boost, it's just being bypassed, so the instant you hit the throttle, there's already boost waiting.

3) Turbo's are not free power! This drives me crazy, yes they are more efficient than superchargers, but they are by no means free. If you didn't have the compressor end of a turbo, do you really think you'd make the same horsepower with a big obstruction in your exhaust than without? Of course not! They lose power by blocking the exhaust, but more than make up for it by creating boost. Same thing with a supercharger, robs power from the belt, more than makes up for it with boost. Same idea, different efficiency is all.

4) Air/water intercoolers are much more efficient that air/air as Das Schmoo stated. Also, there are air/water intercoolers available for the jackson racing setup, and most have shown great results with it. It is very practical, you don't run ice daily, just when you're doing a drag race. And you don't use antifreeze, you use mainly water, as water has a higher heat capacity. Unless of course you're out in the dead of winter, then maybe you want a little more antifreeze.

5) A positive displacement supercharger usually sees a gas mileage increase when cruising. Of course in town with a lead foot, it'll go way down, but that is something particular to the driving style, not the forced induction.

6) No one setup is more reliable than the other, it all comes down to the individual. If you're some back woods bobo, halfassing it the whole way, it's not going to be reliable. If you're smart about it and use your whole ass, it'll be much less hassle.

You just need to figure out what you want. Autocrossing? Roots type supercharger is a good way to go, with the instant boost and all. Drag? Turbo is a better choice usually, easy to make alot of power, and you're on the gas continuously (well for those 10-17 seconds hehe). Only want a huge HP number? This is about the only place a centrifugal supercharger would be good, but it's just soo not for Hondas.

Personally, I'd go with a nice intercooled JRSC setup, aiming for 250whp max. I like the instant on (although I have owned and still love turbo cars), and would like to try something different. That's not to say a properly sized turbo kit couldn't make 250whp with almost no lag, but it's not instant either. But hey, I'm going H22 in my EH2, so what do I know! :thinking: Ooh, maybe I'll beat the tar out of my firewall and stuff a JRSC in there too!!! :crazyr: