As the title says, what is the max bore that you can have on an A15? My engine's going to need new rings, and has a pretty decent ridge, so i figured it may be about time to just have a fresh bore and hone. I want to increase the displacement as much as possible while it's apart since I've been looking at quad carb setups and forced induction.

Next question is, would I benefit any with a larger bore, or am i pretty much at peak power with 1.5L?

Also heard about CA18DET pistons and rods possibly fitting an A15, meaning maybe it can be boored to 1.8L?

Thanks in advance.


Also, in a semi-unrelated note, I LOVE the A-series engines. Believe it or not, my engine is actually down to an average of 50PSI of compression (tested on multiple testers to confirm accuracy) and still runs like a champ. It smokes, which is why I'm going ahead with the rings since I just rebuilt the head.