When I get my jdm gsr, It will be the complete swap kit from hmotorsonline, the b18c-sir-G...(thanks HAN)...Can I use a turbo kit built for a USDM (b18c1)GSR? Or will I need an engine specific kit? (I'm asking this because of the different compression ratios from US and Japanese GSR's.......USDM=10:1.....JDM=10.6:1

 

a b18c1 turbo kit will work, you just have to tune it differently for the higher cr.

 

Speaking of tuning, how about the hondata ecu (s200b) for the same car, (95 hatch -not-si w/jdm gsr swap (b18c sir iii))? When I have it tuned, will I need to order a different hondata unit?

 

Order it for whatever ecu your running. A simple search through here www.hondata.com will answer your questions.