[Ecky]

I have a Honda B18B1 motor in my Del Sol, which has a stock C/R of 9.2:1. I have a set of pistons laying around that would raise the C/R to 10.8:1.

From what I've read, I would stand a good chance of being able to run 89 octane safely at that compression (though we have 93 available). I'm not likely to do this any time soon, but do you suppose next time I pull my motor apart, it would be worth installing these high compression pistons? Would the potential need for higher octane fuel outweigh the efficiency gains? The cost difference between grades of fuel here isn't very large, often as little as 15 or even 10 cents.


Thanks!