I had a 418whp D16Z6 that I ran for about 6 years then sold it. The best the car ran was 11.8@130mph spinning thru 1st 2nd and 3rd gear. It was a stock block and crank running eagle rods and Arias pistons. This was in a heavy Civic SI model. My new setup should make around 475whp with my new turbo and manifold.
I have since then had several stock D16 engines with arp head bolts that ran mid 12's @ 120mph.
You can make great HP with them with very little money. Plus they all can get great FE.
A good site to check out is
D-Series.org - Your Ultimate D-Series Resource
I'm rrussell on there and have a couple stickeys. Feel free to pm with any questions.