Honda, Higher compression = better mpg?

[serialk11r]

Originally Posted by IWantHX

I dont think the engine NEEDS rebuilding, just wanting to do it for knowledge and to know I have a fresh engine, but wondering if higher compression pistons (can be had from other oem d16's for pretty cheap) can help with both low throttle cruising mpgs and for a little more passing power

In this range, yes, increased compression ratio will help those. The difference will be slight, but it'll be there. If it's not expensive and you're rebuilding the engine anyways I'd just do it. The stuff I was talking about applies when you go over 13:1 or something like that.

By the way do you have adjustable cam lifters or whatever? Maybe a fuel economy regrind while you're at it ("Atkinson cycle" slightly increased intake duration)? Deltacam quoted me ~175 dollars for a weld + grind job, if you have lash adjustment or whatever then it would be less.