Okay, most of the posts I've ever done on here are for answering questions, not asking. I've searched for a bit, but cannot find anything definitive on the subject. I have a 96 Tracker with the 16v engine. I've really been looking into the turbocharging threads, because it seems like the cheapest, most straightforward plan as far as moderate hp gains, minimal actual modifications, etc. Anyways, this last Friday I get a wild hair and figure it's a good idea to know that the platform I'm going to be modifying from is solid, so I go to do a compression test, make sure everything is within spec. Let's just say I was a little disturbed by my findings!
Cylinder 1: 150 psi (dry)
Cylinder 2: 130 psi (dry)
Cylinder 3: 160 psi (dry)
Cylinder 4: 60 psi (dry), 90 psi (wet)
From what I have read, around 180psi is what you should see, if my sources are correct:)
My Tracker has 198,000 miles on it, and smokes on start-up. I figured that it needed valve stem seals, and that compression would be a little low, but cylinder 4 really suprised me. It just had a new head gasket before I bought it 2 years ago.
Now, what I'm basically toying with is honing/deglazing the cylinders, and putting new rings in it. However, in light of the fact that I'd like to turbocharge it someday, I'm now kind of at a fork in the road. Keep it stock, or upgrade now while I'm already in there?
So my questions are these:
I've seen and read that Honda d16 tuners are using Vitara pistons to lower compression on their engines. Are the aftermarket pistons labeled "Vitara Honda Turbo d16"...etc. basically the same piston that I have, or is it a different piston? On eBay there are some by Nippon (never heard of them, but...

that come with the pistons, pins, and rings. They say their forged and all that good stuff, so I wondered if they would be a good alternative to stockies.
Second, with the previously mentioned pistons, they are advertiesed as "low compression, 8.5:1 pistons." I know that's for the d16. For mine, will it still be stock compression? Or close to it? Higher? Lower?
Third, if they work, do I need to use OEM Tracker rings, or will the supplied rings work in my 16v?
And lastly, if these pistons are okay to use in my 16v, can I (or more importantly, would you recommend) run these pistons without turbocharging it right away? My concern is that if it does lower compression, that it wouldn't run well enough for everyday driving. Wildgoody, i know you've been down this road just from reading all the threads, but I'm sure there's a lot more people that have some info too. I'd really appreciate it. Here's a link for the pistons from eBay:
http://cgi.ebay.com/ebaymotors/CIVIC-VITARA-TURBO-PISTONS-D16-SI-RINGS-ZC-D16Y-CRX-/150606170595?pt=Motors_Car_Truck_Parts_Accessories&hash=item2310d3c9e3 Again, I'd really appreciate any and all comments on this!