I'm trying to find a spare b16 block to send to golden eagle to get resleeved so I can run some more boost. Is there a difference between the block between years other than maybe compression ratios? Will something like an obd1 b16 block for a 91 car work well with my obd2 b16a2 from my Si?

 

Same stuff man... since it's not like a head with several sensors etc, the OBD1 or 2 is not an issue for you. Any B16 block will do just fine.

 

I know the H22A1 from a 4th Gen Prelude and the H22A4 from a 5th Gen Preude blocks are way different. The cranks are different too, and the 4th gen is closed deck, while the A4 is open deck, anyways:

You'll have to find out if that applies to B16's.

Sorry I coulnd't help much.

 

Top! Everyone else agree with HybridKOOP?

 

not too sure... might want to check on the Crank Angle sensor... whether it's diff or not...

 

ALL b16a and B17A block castings are going to be the same.
only difference is in the external hardware and internals.