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Turbo's are fun but not for everyone for everyday. Kinda like a chopper. You gotta enjoy em to put up with the drawbacks.

JLeather. Why custom pistons? Why not use flattops or stock and a big 77-78 chamber? or a thicker base gasket? Extra 40thou on the base drops my bike from 11 to 1 down to 9.5 to one. I know dish ppistons are better and all but hey it works.

Jleather have you looked into coatings? the new coatings you can bake in and oven yourslef. NOt your oven a oven. they can be a little nasty you know. So you bead blast teh chamber and top of piston and put on the heat rejecting coating and it keeps your temps down by not letting it soak out the chamber and piston. Ya forging are a little better and a little stronger. For heat mostly cuz they usually have thicker tops. As far as strength you should find out what stockers will take, you might be surpries. Plus a little prep goes a long way. One other thing you can do is run water injection. Helps a lot. I am running 7psi on pump witha compressor efficiency of about 68-70 so on a 70 degree day My intake air temp is gonna be about 195 without the water running. You can get up to around 300 or 320 but you gonna get in trouble up there. I got a spreadsheet you might be interested in. You put in motor size, air temp. pressure. turbo psi, efficiency, volumetric effieciency of cylinder head and some other stuff and it kicks out projected Hp and intake temp. email if you are interested in it.

Ok I have the spreadsheet in my stuff from my old job let me upload it. In a day or two. I just fudge teh VE numbers. I put in all the stock stuff and then move the VE till it says 50ish Hp. I think it is only like 70% or so if I am recalling correctly.